Chapter Questions
Natural gas is composed primarily of(a) methane(b) $\mathrm{n}$-butane(c) $\mathrm{n}$-octane(d) a mixture of alkanes
Alkanes mainly undergo reactions having(a) free radical reaction(b) ionic elimination(c) electrophillic addition(d) heat/photochemical substitution
Carbon black, which is used in making printer's ink is obtained by the decomposition of(a) acetylene(b) benzene(c) carbon tetrahedral(d) methane
Addition of HCN to ethyne in the presence of $\mathrm{Ba}(\mathrm{CN})_{2}$ as a catalyst gives(a) vinyl cyanide(b) ethyl cyanide(c) 1,1 -dicyanoethane(d) divinyl cyanide
The reagent used for the following conversion, $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH} \longrightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}$ isa) $\mathrm{LiAlH}_{4}$b) amalgamated zinc and concerntrated $\mathrm{HCl}$c) red phosphorus and concentrated HId) soda lime
Acetylene reacts with acetic acid in presence of $\mathrm{Hg}$ ions at room temperature to give(a) ethyl acetate(b) acetaldehyde(c) vinyl acetate(d) methyl acetate
Which of the following is used for the conversion of 2-hexyne into trans-2-hexane?(a) $\mathrm{H}_{2} / \mathrm{Pd} / \mathrm{BaSO}_{4}$(b) $\mathrm{H}_{2}, \mathrm{PtO}_{2}$(c) $\mathrm{NaBH}_{4}$(d) $\mathrm{Li}-\mathrm{NH}_{3} / \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$
The addition of $\mathrm{HCl}$ to $3,3,3$-trichloropropene give:(a) $\mathrm{Cl}_{3} \mathrm{CCH}_{2} \mathrm{CH}_{2} \mathrm{Cl}$(b) $\mathrm{Cl}_{2} \mathrm{CHCH}(\mathrm{Cl}) \mathrm{CH}_{2} \mathrm{Cl}$(c) $\mathrm{Cl}_{2} \mathrm{CHCH}_{2} \mathrm{CHCl}_{2}$(d) $\mathrm{Cl}_{3} \mathrm{CCH}_{2} \mathrm{CH}_{2} \mathrm{Cl}=960 \quad$ Page
Which one of the following has the minimum heat of hydrogenation per mole?(a) 1-butene(b) trans-2-butene(c) cis-2-butene(d) 1,3 -butadiene
Isopropyl bromide on Wurtz reaction gives(a) hexane(b) propane(c) 2,3 -dimethyl butane(d) neo-hexane
The product formed by acid catalysed hydration of 2-phenyl propene is(a) 3-phenyl-2-propanol(b) 1-phenyl-2-propanol(c) 2-phenyl-2-propanol(d) 2-phenyl-1-propanol
Reactivity of chlorine and bromine towards methane at $275^{\circ} \mathrm{C}$ differs by a factor nearly(a) $10^{3}$(b) $10^{4}$(c) $10^{2}$(d) $>10^{5}$
Among the following compounds, the strongest acid is(a) $\mathrm{HC} \equiv \mathrm{CH}$(b) $\mathrm{C}_{6} \mathrm{H}_{6}$(c) $\mathrm{C}_{2} \mathrm{H}_{6}$(d) $\mathrm{CH}_{3} \mathrm{OH}$
Antidote of Lewsite is(a) 3, 3 -dimercaptopropan-1-ol(b) 2 -mercaptopropan-1, 3 -diol(c) 2,3 -dimercaptopropan-1-ol(d) 2,2 -dimercaptopropan-1-ol
Acetylene and HCHO react in the presence of copper acetylide catalyst to form(a) 2-butyne-1, 4 -diol(b) but-2-yne-1, 2 -diol(c) but-1-yne-1, 4 -diol(d) none of these
The intermediate product formed during the addition of $\mathrm{HCl}$ to propene in presence of peroxide is(a) $\mathrm{CH}_{3} \mathrm{CHCH}_{2} \mathrm{Cl}$(b) $\mathrm{CH}_{3} \mathrm{CHCH}_{3}$(c) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2}$(d) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2}$
Which will have smallest heat of hydrogenation per mole?(a) cis-2-butene(b) trans-2-butene(c) 1,3 -butadiene(d) 1 -butene
When cyclohexane is poured on water, it floats because(a) cyclohexane is in boat form(b) cyclohexane is in chair form(c) cyclohexane is in crown form(d) cyclohexane is less dense than water
vBoth methane and ethane can be prepared in one ste by the reaction of(a) $\mathrm{C}_{2} \mathrm{H}_{4}$(b) $\mathrm{CH}_{3} \mathrm{Br}$(c) $\mathrm{CH}_{3} \mathrm{OH}$(d) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$
P. Here the major product is(a)<smiles>CC(C)C1=CCCCC1Br</smiles>(b)(c)<smiles>CC(Br)C1(Br)CCCCC1</smiles>(d)<smiles>CC(CBr)C1=CCCCC1</smiles>
Which one of these is not compatible with arenes?(a) greater stability(b) resonance(c) delocalization of $\pi$-electrons(d) electrophillic addition
$\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CMgCl}$ on reaction with $\mathrm{D}_{2} \mathrm{O}$ produces(a) $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CD}$(b) $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{OD}$(c) $\left(\mathrm{CD}_{3}\right)_{3} \mathrm{CD}$(d) $\left(\mathrm{CD}_{3}\right)_{3} \mathrm{OD}$
The treatment of benzene with isobutene in the presence of sulphuric acid gives(a) isobutyl benzene(b) n-butyl benzene(c) tert-butyl benzene(d) cumene
Addition of water to acetylene compounds is catalysed by ........... and ...........(a) $\mathrm{Ba}^{+2}$ salt and $\mathrm{HgSO}_{4}$(b) $\mathrm{Hg}^{+2}$ salt and conc. acid(c) $\mathrm{Hg}^{+2}$ salt and dil. acid(d) $\mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{+}$
Toluene on oxidation with chromyl chloride produces(a) benzaldehyde(b) benzoic acid(c) acetophenone(d) benzyl alcohol
On the addition of $\mathrm{HBr}$ to propene in the absence of peroxides, the first step involves the addition of(a) $\mathrm{H}^{+}$(b) $\mathrm{Br}^{-}$(c) $\dot{H}$(d) $\mathrm{Br}$
When ethyl bromide and $\mathrm{n}$-propyl bromide is allowed to react with sodium, in ether, they form(a) mixture of four alkanes(b) mixture of three alkanes(c) mixture of two alkanes(d) single alkane
Which of the following is a free radical substitution reaction?(a)<smiles>Cc1ccccc1</smiles>(b)(c)(d) both (b) and (c)
The reaction conditions leading to provide the bestyield of $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}$ are(a) $\mathrm{C}_{2} \mathrm{H}_{6}($ excess $)+\mathrm{Cl}_{2}$ uv ligh(b) $\mathrm{C}_{2} \mathrm{H}_{6}+\mathrm{Cl}_{2} \stackrel{\text { dark, room temperature }}{\longrightarrow}$(c) $\mathrm{C}_{2} \mathrm{H}_{6}+\mathrm{Cl}_{2}($ excess $) \stackrel{\text { uv ligh }}{\longrightarrow}$(d) $\mathrm{C}_{2} \mathrm{H}_{6}+\mathrm{Cl}_{2} \stackrel{\text { uv ligh }}{\longrightarrow}$
Octane number of gasoline can be increased by the addition of BTX. BTX stands for(a) Butane, TEL, xylene(b) Butane, tetramethyl lead, xylene(c) Benzene, toluene, xylene(d) Benzene, TEL, xylene
Which of the following alkane can be prepared large amounts by Wurtz reaction?(a) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2}$(b)<smiles>CCC</smiles><smiles>CCCC(C)C</smiles>(c) $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCH}_{2} \mathrm{CH}_{3}$(d) $\mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3}$
The highest boiling point is expected for(a) iso-octane(b) $\mathrm{n}$-octane(c) $2,2,3,3$-tetramethyl butane(d) $\mathrm{n}$-butane
In which reaction, the product from antiMarkovnikov's rule is observed?(a) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2} \stackrel{\mathrm{HCl}}{\mathrm{H}}$(b) $\mathrm{ClCH}=\mathrm{CH}_{2} \stackrel{{ }_{2} \mathrm{HCl}}{\longrightarrow}$(c) $\mathrm{CH}_{3} \mathrm{OCH}=\mathrm{CH}_{2} \stackrel{\mathrm{HCl}}{\longrightarrow}$(d) None of these
Acidic hydrogen is present in(a) ethyne(b) ethene(c) benzene
Which is not a product when<smiles>O=C1C(O)CCC(O)C1O</smiles> is treated with HIO $_{4}$ ?(a) $\mathrm{HCOOH}$(b) $\mathrm{H}_{2} \mathrm{O}$(c) $\mathrm{HCHO}$(d) $\mathrm{CO}_{2}$
Anti-Markovnikov's addition of $\mathrm{HBr}$ is not observed in(a) propene(b) but-1-ene(c) but-2-ene(d) pent-3-ene
Which of th incorrect statement regarding oxymercuration-demercuration?(a) here rearrangement takes place(b) in the second step demercuration occurs that is, $\mathrm{NaBH}_{4}$ reduces $-\mathrm{HgOAc}_{2}$ group to hydrogen(c) the net reaction is addition of water according to Markovnikov's rule(d) In the first step oxymercuration occurs, that is, water and $\mathrm{Hg}(\mathrm{OAc})_{2}$ add to double bond
Baeyer's reagent is(a) acidified permanganate solution(b) alkaline permanganate solution(c) neutral permanganate solution(d) aqueous bromine solution
$\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2} \stackrel{\mathrm{NBS}}{\mathrm{HOBr}}$(a)<smiles>BrCC(Br)CBr</smiles>(b)(c)<smiles>OCC(Br)CBr</smiles>(d)<smiles>OCC(O)CBr</smiles>
The compound with the highest boiling point is(a) n-pentane(b) 2-methyl butane(c) 2,2 -dimethyl propane(d) n-hexane
Which of the following will not give an alkene when treated with $\mathrm{Ph}_{3} \mathrm{P}=\mathrm{CH}_{2} ?$(a) $\mathrm{R}_{2} \mathrm{C}=\mathrm{C}=\mathrm{O}$(b) $\mathrm{RNCO}$(c) RNC(d) $\mathrm{R}_{2} \mathrm{C}=\mathrm{NR}$
Which of the following will show geometrical isomerism?(a) 2-methyl butene(b) propene(c) vinyl chloride(d) but-2-ene
In the given reaction $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3} \stackrel{\mathrm{Na} / \mathrm{NH}_{3}(\mathrm{I})}{\longrightarrow}[\mathrm{X}]$ will be(a) butane(b) trans-2-butene(c) cic-2_hutene(d)
Propyne $\frac{\mathrm{HgSO}_{4}}{\mathrm{Hg}_{7} \mathrm{SO}_{4}} \rightarrow \mathrm{A} .$ Compound $\mathrm{A}$ is(a) 2-propanal(b) propane(c) propene(d) 2 -propanone
In the given reaction (P) will be(a) 2-butanol(b) 2-butene(c) 1 -butene(d) 1 -butanol
Which hydrocarbon has the highest octane number?(a) methane(b) ethane(c) iso-octane(d) triptane
In the reaction sequence (A) will be<smiles>CC1=CCCC1</smiles>(a) 1 -bromo-2- ethyl cyclopentane(b) 1 -bromo-1-methyl cyclopentane(c) 1 -bromo-5-methyl cyclopentane(d) 5 -bromo-1-methyl cyclopentane
Which of the following gives propyne on hydrolysis?(a) $\mathrm{Al}_{4} \mathrm{C}_{3}$(b) $\mathrm{Mg}_{2} \mathrm{C}_{3}$(c) $\mathrm{B}_{4} \mathrm{C}$(d) $\mathrm{L} \mathrm{a}_{4} \mathrm{C}_{3}$
Which among the following reagents converts cyclohexene into trans diol?(a) Baeyer reagent(b) $\mathrm{OsO}_{4}$(c) $\mathrm{I}_{2} / \mathrm{CH}_{3} \mathrm{COOAg}$ (wet)(d) $\mathrm{I}_{2} / \mathrm{CH}_{3} \mathrm{COOAg}$ (dry)
The product formed on reaction of HBr with propene is(a) 1 -bromoproapne(b) 2 -bromopropane(c) 3 -bromopropane(d) no reaction occurs
Molecular weight of an unknown compound $[\mathrm{A}]$ is82. Compound [A] will be(a) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$(b) $\mathrm{CH}_{2}=\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}$(c)<smiles>CC1=CCCC1</smiles>(d) all of these
There is free rotation about the carbon-carbon \sigma-bond in ethane. This means that the energy difference between the staggered and eclipsed conformers is(a) $3 \mathrm{~kJ} \mathrm{~mol}^{-1}$(b) $23 \mathrm{~kJ} \mathrm{~mol}^{-1}$(c) $13 \mathrm{~kJ} \mathrm{~mol}^{-1}$(d) $17 \mathrm{~kJ} \mathrm{~mol}^{-1}$
Potassium salt of 2,3 -dimethyl maleic acid on electrolysis gives(a) ethyene(b) propyne(c) 2 -butyne(d) 1 -butyne
vWhich of the following shows acidic character?(a) $\mathrm{CH}_{3}-\mathrm{CH}_{3}$(b) $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH}$(c) $\mathrm{CH}=\mathrm{CH}_{2}$(d) $\mathrm{CH}_{1} \equiv \mathrm{C}-\mathrm{CH}_{3}$
Which among the following alkyne will give an aldehyde on hydroboration oxidation reaction?(a) $\mathrm{CH} \equiv \mathrm{CH}$(b) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H}$(c) $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H}$(d) all of these
Which of the reagents on reaction with cyclohexanol gives best yield of cyclohexene?(a) conc. $\mathrm{H}_{3} \mathrm{PO}_{4}$(b) conc. $\mathrm{HCl}$(c) conc. $\mathrm{HBr}$(d) conc. $\mathrm{HCl}$ with $\mathrm{ZnCl}_{2}$
Reductive ozonolysis of the alkene, $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{C}=\mathrm{CH}_{2}$ will give(a) only $\mathrm{CO}_{2}$(b) only $\mathrm{CH}_{2} \mathrm{O}$(c) only $\mathrm{CH}_{3}-\mathrm{CHO}$(d) mixture of $\mathrm{CH}_{3} \mathrm{CHO}, \mathrm{HCHO}$ and $\mathrm{CO}_{2}$
In the preparation of alkene from alcohol using $\mathrm{Al}_{2} \mathrm{O}_{3}$, which is the most effective factor?(a) porosity of $\mathrm{Al}_{2} \mathrm{O}_{3}$(b) temperature(c) surface area of $\mathrm{Al}_{2} \mathrm{O}_{3}$(d) concentration
Which has the maximum boiling point as well as melting point out of the following:<smiles>CCCCC</smiles><smiles>CCC(C)C</smiles><smiles>CC(C)(C)C</smiles>(1)(2)(3)(a) 1 in both the cases(b) 1,2(c) 1,3(d) 2,1
<smiles>C1=CCCCC1</smiles><smiles>COC1CCC(=C2CCCCC2)CC1</smiles>In the above reaction, A will be(a) t-BuOK(b) alcoholic KOH(c) $\mathrm{Et}_{3} \mathrm{~N}$(d) conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$
$\mathrm{R}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{CCl}_{4} \stackrel{\text { Peroxide }}{\longrightarrow} \mathrm{A}$. Here, $\mathrm{A}$ is(a)<smiles>[R]C(Cl)CC(Cl)(Cl)Cl</smiles>(b)(c) both are correct(d) reaction does not take place
Benzyl chloride $\left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{Cl}\right)$ can be prepared from toluene by chlorination with(1) $\mathrm{SO}_{2} \mathrm{Cl}_{2}$(2) $\mathrm{SOCl}_{2}$(3) $\mathrm{Cl}_{2}$(4) $\mathrm{NaOCl}$(a) 1 and 2(b) 1 and 4(c) 2 and 3(d) 4
In the given reaction, $\mathrm{C}_{7} \mathrm{H}_{8} \stackrel{3 \mathrm{Cl} \Delta}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Br}_{2} / \mathrm{Fe}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{ZnHCI}}{\longrightarrow} \mathrm{C}$The compound $\mathrm{C}$ is(a) o-bromotoluene(b) m-bromotoluene(c) p-bromotoluene(d) 3-bromo-2, 2,6 -trichlorotoluene
To $0.037 \mathrm{~g}$ of an alcohol, $\mathrm{R}-\mathrm{OH}$ was added to $\mathrm{CH}_{3} \mathrm{Mgl}$ and the gas evolved measured $11.2 \mathrm{~cm}^{3}$ at STP. What is the molecular mass of $\mathrm{R}-\mathrm{OH} ?$(a) 46(b) 60(c) 74(d) 88
The product formed is(a) 1,2 -dichloroethane(b) 3-chloropropene(c) 1-chloro-2-iodopropane(d) 1 -iodo-2-chloropropane
In which of the following compounds, the weight percentage of $\mathrm{C}$ and $\mathrm{H}$ are 80 and 20 respectively?(a) $\mathrm{C}_{2} \mathrm{H}_{6}$(b) $\mathrm{CH}_{4}$(c) $\mathrm{C}_{6} \mathrm{H}_{6}$(d) $\mathrm{C}_{2} \mathrm{H}_{3}$
The relative rates of hydrogenation is in the order of(a) $\mathrm{R}_{2} \mathrm{C}=\mathrm{CHR}>\mathrm{RCH}=\mathrm{CHR}>\mathrm{RCH}=\mathrm{CH}_{2}>\mathrm{CH}_{2}=\mathrm{CH}_{2}$(b) $\mathrm{CH}_{2}=\mathrm{CH}_{2}>\mathrm{RCH}=\mathrm{CH}_{2}>\mathrm{RCH}=\mathrm{CHR}>\mathrm{R}_{2} \mathrm{C}=\mathrm{CHR}$(c) $\mathrm{RCH}=\mathrm{CHR}>\mathrm{R}_{2} \mathrm{C}=\mathrm{CHR}>\mathrm{RCH}=\mathrm{CH}_{2}>\mathrm{CH}_{2}=\mathrm{CH}_{2}$(d) $\mathrm{R}_{2} \mathrm{C}=\mathrm{CHR}>\mathrm{CH}_{2}=\mathrm{CH}_{2}>\mathrm{RCH}=\mathrm{CHR}>\mathrm{RCH}^{2}=\mathrm{CH}_{2}$
$\mathrm{CHCOONa} \stackrel{\text { Electolysis }}{\longrightarrow}[\mathrm{A}] \frac{\mathrm{L}_{2}}{\text { liquid } \mathrm{NH}_{\mathrm{I}}}[\mathrm{B}]$Here, [B] is(a) $\mathrm{CH} \equiv \mathrm{CH}$(b) $\mathrm{NaC} \equiv \mathrm{CNa}$(c) $\mathrm{I}-\mathrm{C} \equiv \mathrm{C}-\mathrm{I}$(d) $\mathrm{IC} \equiv \mathrm{CNa}$
In the reaction of phenol with $\mathrm{CHCl}_{3}$ and aqueous $\mathrm{NaOH}$ at $70^{\circ} \mathrm{C}(343 \mathrm{~K})$, the electrophile attacking the ring is(a) $\mathrm{CHCl}_{3}$(b) $\mathrm{CHCl}_{2}$(c) $\mathrm{CCl}_{2}$(d) $\mathrm{COCl}_{2}^{*}$
$\mathrm{C}-\mathrm{C}-\mathrm{C} \equiv \mathrm{C} \stackrel{\angle \mathrm{A}}{\mathrm{B}}>\mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{C}$Here, $[\mathrm{A}]$ and $[\mathrm{B}]$ are(a) alc. $\mathrm{KOH}$ and $\mathrm{NaNH}_{2}$(b) $\mathrm{NaNH}_{2}$ and Lindlar catalyst(c) $\mathrm{NaNH}_{2}$ and alcoholic $\mathrm{KOH}$(d) Lindlar catalyst and $\mathrm{NaNH}_{2}$
Benzene reacts with $\mathrm{CH}_{3} \mathrm{COCl}$ in the presence of anhydrous $\mathrm{AlCl}_{3}$ to give(a) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{3}$(b) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{Cl}$(c) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}_{2} \mathrm{Cl}$(d) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{3}$
In this reaction $\mathrm{A}$ is<smiles>CC=C(C)CC</smiles>(a)<smiles>CCC(C)(O)C(C)Cl</smiles>(b)(c)<smiles>CCC(C)(Cl)C(C)O</smiles>(d)<smiles>CCC(C)(O)CCl</smiles>
$\mathrm{CH} \equiv \mathrm{CH}+2 \mathrm{HCHO} \stackrel{\mathrm{CH}_{2} \circ}{\longrightarrow} \mathrm{X}$ is(a) $\mathrm{HOH}_{2} \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2} \mathrm{OH}$(b) $\mathrm{HOH}_{2} \mathrm{C}-\mathrm{C}=\mathrm{C}-\mathrm{CH}_{3} \mathrm{OCH}_{3}$(c) both are true(d) none
What will be the product in the following reaction?<smiles>C=C1CCCCC1</smiles> NBS(a)<smiles>CC1CCCCC1Br</smiles>(b)<smiles>CC1CCC(Br)CC1</smiles>
Which is most easily dehydrohalogenated?<smiles>CC(C)(C)C</smiles><smiles>ClC1C=CC=CC1Cl</smiles><smiles>ClC1C=CCC=C1</smiles><smiles>ClC1=CCC=CC1</smiles>II(a) I(b) II(c) III(d) cannot be determined
Which of the following compounds does not dissolve in concentrated $\mathrm{H}_{2} \mathrm{SO}_{4}$ even on warming?(a) aniline(b) benzene(c) ethylene(d) hexane
When propyne is treated with aqueous $\mathrm{H}_{2} \mathrm{SO}_{4}$ in presence of $\mathrm{HgSO}_{4}$ the major product is(a) acetone(b) propanol(c) propanal(d) propyl hydrogen sulphate
$\mathrm{R}-\mathrm{C} \equiv \mathrm{C}-\mathrm{R} \frac{\mathrm{H}_{2}}{\mathrm{Limll}}$(a)<smiles>[R]C=C([R])C</smiles>(b)<smiles>[R]C=C([R])C</smiles>(c) both (a) and (b)(d) $\mathrm{R}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{R}$
Which is the decreasing order of strength of bases$\mathrm{OH}^{-}, \mathrm{NH}_{2}^{-}, \mathrm{HC} \equiv \mathrm{C}^{-}$and $\mathrm{CH}_{3} \mathrm{CH}_{2}^{-} ?$(a) $\mathrm{CH}_{3} \mathrm{CH}_{2}^{->} \mathrm{NH}_{2}^{->} \mathrm{HC}=\mathrm{C}^{-}>\mathrm{OH}^{-}$(b) $\mathrm{HC} \equiv \mathrm{C}^{-}>\mathrm{CH}_{3} \mathrm{CH}_{2}^{-}>\mathrm{NH}_{2}^{-}>\mathrm{OH}^{-}$(c) $\mathrm{OH}^{-}>\mathrm{NH}_{2}^{-}>\mathrm{HC}=\mathrm{C}^{-}>\mathrm{CH}_{3} \mathrm{CH}_{2}^{-}$(d) $\mathrm{NH}_{2}^{-}>\mathrm{HC}=\mathrm{C}^{-}>\mathrm{OH}^{-}>\mathrm{CH}_{3} \mathrm{CH}_{2}^{-}$
$\mathrm{N}$ (isomeric products)$\mathrm{CH}_{5} \mathrm{H}_{11} \mathrm{Cl} \frac{\text { Fractional }}{\text { distillation }}-\mathrm{M}$ (isomeric products)(a) 6,6(b) 6,4(c) 4,4(d) 3,3
$\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{NOCl} \longrightarrow \mathrm{P}$. Identify $\mathrm{P}$(a)<smiles>CC(Cl)C[N+](=O)[O-]</smiles>(b)(c)<smiles>CCCCl</smiles>(d)<smiles>O=[N+]([O-])CCCl</smiles>
$\mathrm{Ph}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3} \stackrel{\mathrm{Hg}_{1}^{-3} \mathrm{H}^{\prime}}{\longrightarrow} \mathrm{A}$. Here, $\mathrm{A}$ is(a)<smiles>CCC(=O)c1ccccc1</smiles>(b)<smiles>CC(=O)Cc1ccccc1</smiles>(c)<smiles>CCC(O)c1ccccc1</smiles>(d)<smiles>CC(O)Cc1ccccc1</smiles>
Identify the products of the following reaction, $\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{3} \stackrel{\text { (i) } \mathrm{O}_{3}}$ (ii) hydrolysis $?+?$(a) $\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{CO}_{2}$(b) $\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{HOOC} \cdot \mathrm{CH}_{2} \mathrm{CH}_{3}$(c) $\mathrm{CH}_{3} \mathrm{CHO}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}$(d) $\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{CH}_{3} \mathrm{COCH}_{3}$
Consider the following reaction, $\mathrm{Br} \longrightarrow \mathrm{X}+\mathrm{HBr}$<smiles>*C(C)CC(C)C</smiles> Identify the structure of the major product $\mathrm{X}$(a)<smiles>*C(C)C(C)C</smiles>(b)<smiles>*C(C)C(C)C</smiles>(c)<smiles>*C(C)C(C)C</smiles>(d)
Wurtz reaction of methyl iodide yields an organic compound $\mathrm{X} .$ Which one of he following reactions also yields X?(a) $\mathrm{CHCl}_{3} \stackrel{\mathrm{Ag} \text { powder, } \Delta}{\longrightarrow}$(b) $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}+\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{ONa} \longrightarrow$(c) $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}+\mathrm{LiAlH}_{4} \longrightarrow$(d) $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}+\mathrm{Mg}$ Dry ether
Identify the reagent from the following list which can easily distinguish between 1 -butyne and 2 -butyne?(a) bromine, $\mathrm{CCl}_{4}$(b) $\mathrm{H}_{2}$, Lindlar catalyst(c) dilute $\mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{HgSO}_{4}$(d) ammonical coprocess chloride
The reaction of propene with HOCl proceeds via the addition of(a) $\mathrm{H}^{+}$in the first step(b) $\mathrm{Cl}^{+}$in the first step(c) $\mathrm{OH}$ - in the first step(d) $\mathrm{Cl}^{+}$and $\mathrm{OH}^{-}$in a single step
Hydrogenation of the above compound in the presence of poisoned palladium catalyst gives(a) optically active compound(b) an optically inactive compound(c) a racemic mixture(d) a diastereomeric mixture
The reaction of HBr within the presence of peroxide will give<smiles>C=C(C)C</smiles>(a)<smiles>CC(C)(C)C</smiles>(b) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}$(c)<smiles>CC(C)C</smiles> $\mathrm{Br}$(d)<smiles>CCC(C)C</smiles>
Which of the following alkenes will react fastest with $\mathrm{H}_{2}$ under catalytic condition?(a)(b)<smiles>[R]C([R])=C([R])C</smiles>(c)(d)
Propyne and propene can be distinguished by(a) conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$(b) $\mathrm{Br}_{2}$ in $\mathrm{CCl}_{4}$(c) diluted $\mathrm{H}_{2} \mathrm{SO}_{4}$(d) $\mathrm{AgNO}_{3}$ in ammonia
The product(s) obtained via oxymercuration $\left(\mathrm{HgSO}_{4}\right.$ $+\mathrm{H}_{2} \mathrm{SO}_{4}$ ) of but-1-yne would give(a)<smiles>CC(C)=O</smiles>(b) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2}-\mathrm{CHO}$(c) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}+\mathrm{HCHO}$(d) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{HCOOH}$
The reaction of<smiles>CC=Cc1ccc(O)cc1</smiles> with HBr gives(a)<smiles>CC(Br)Cc1ccc(O)cc1</smiles>(b)<smiles>CCC(Br)c1ccc(O)cc1</smiles><smiles>CC(Br)Cc1ccc(Br)cc1</smiles>(c)(d)<smiles>CCC(Br)c1ccc(Br)cc1</smiles>
Ethene and ethyne can be distinguished by(a) $\mathrm{Br}_{2}$ water(b) $\mathrm{KMnO}_{4}$ solution(c) cuprous chloride solution(d) any of the above
2,3 -dimethyl hexane contains .... tertiary .... secondary and ..... primary carbon atoms, respectively.(a) $2,4,3$(b) $3,2,4$(c) $4,3,2$(d) $2,2,4$
Which among the following will give a precipitate with ammonical silver nitrate?(a) 2 -butene(b) 2 -butyne(c) chlorobenzene(d) 3 -methyl-1-butyne
Which of the following sequence of reagents can be used for the conversion of $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{CH}_{3}$ into $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}=\mathrm{CH}_{2} ?$(a) $\mathrm{SOCl}_{2} ; \mathrm{H}_{2} \mathrm{O}$(b) $\mathrm{SO}_{2} \mathrm{Cl}_{2} ;$ alc. $\mathrm{KOH}$(c) $\mathrm{Cl}_{2} / \mathrm{hv} ; \mathrm{H}_{2} \mathrm{O}$(d) $\mathrm{SOCl}_{2} ;$ alc. $\mathrm{KOH}$
An alkene on reductive ozonolysis gives two molecules of $\mathrm{CH}_{2}(\mathrm{CHO})_{2} .$ The alkene is(a) 2,4 -hexadiene(b) 1,3 -cyclohexadiene(c) 1,4 -cyclohexadiene(d) 1 -methyl-1, 3 -cyclopentadiene
\mathrm{\{} 6 r o m i d e ~ i s ~ c o n v e r t e d ~ i n t o ~ e t h a n e ~ b y ~ h e a t i n g ~ i t ~ i n ~ a n ~ether medium with(a) $\mathrm{Al}$(b) $\mathrm{Zn}$(c) $\mathrm{Na}$(d) $\mathrm{Cu}$
In the solvolysis of 3 -methyl-3-bromohexane, which of the following statements is not correct?(a) it involves carbocation intermediate(b) the intermediate involves sp $^{2}$ carbon(c) polar solvents accelerates the reaction(d) it involves inversion of configuration
Which one of the following compounds would have the highest heat of hydrogenation?(a) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$(b) $\mathrm{H}_{3} \mathrm{C}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}$(c) $\mathrm{H}_{3} \mathrm{C}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}$(d) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}$
When 2 -methyl butan-1-ol is dehydrated to give an alkene, the preferred product is(a) but-1-ene(b) but-2-ene(c) 2 -methyl but-1-ene
A hydrocarbon of molecular formula, $\mathrm{C}_{8} \mathrm{H}_{18}$ gives only one monochloro derivative. The hydrocarbon is(a) 2 -methyl heptane(b) octane(c) $2,2,3,3$-tetramethyl butane(d) $2,2,4$-trimethyl pentane
Chloroethane reacts with magnesium in dry ether to form $\mathrm{X}$. When $\mathrm{X}$ is hydrolyzed, a carbon compound $\mathrm{Y}$ and $Z$ are formed. Which of the following is $Y ?$(a) $\mathrm{C}_{2} \mathrm{H}_{4}$(b) $\mathrm{C}_{2} \mathrm{H}_{2}$(c) $\mathrm{C}_{2} \mathrm{H}_{6}$(d) $\mathrm{C}_{6} \mathrm{H}_{6}$
Which one of the following compound yields only one product on monobromination?(a) neopentane(b) aniline(c) phenol(d) toluene
vA hydrocarbon of molecular formula $\mathrm{C}_{7} \mathrm{H}_{12}$ on catalytic hydrogenation over platinum gives $\mathrm{C}_{7} \mathrm{H}_{16} .$ The parent hydrocarbon adds bromine and also reacts with $\left[\mathrm{Ag}\left(\mathrm{NH}_{3}\right)_{2}\right] \mathrm{OH}$ to give a precipitate. The parent hydrocarbon is(a) $\left(\mathrm{CH}_{2}\right)_{3} \mathrm{CCH}_{2} \mathrm{C} \equiv \mathrm{CH}$(b) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{2} \mathrm{CH}=\mathrm{CH}_{2}$(c) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CHCH}\left(\mathrm{CH}_{3}\right)_{2}$(d) $\mathrm{CH}_{2} \mathrm{CH}^{2}=\mathrm{CHCH}=\mathrm{CHCH}_{2}$
In order to obtain trans $\mathrm{Me}-\mathrm{CH}=$ CH-Me from $\mathrm{MeC}=\mathrm{CMe}$, the reagent(s) to be used would includes(a) $\mathrm{LiAlH}_{4}$ in $\mathrm{EtO}_{2}$(b) $\mathrm{H}_{2} / \mathrm{Pd}, \mathrm{BaSO}_{4}$(c) $\mathrm{H}_{2}^{2} / \mathrm{Pd}, \mathrm{Pb}(\mathrm{OAc})_{2}$(d) sodium in liquid ammonia or sodium in $\mathrm{EtOH}$
Cold and dil. $\mathrm{KMnO}_{4}$ combines with but-2-yne to form(a) butane-1, 3 -diol(b) butane-2, 3 -diol(c) butane-2, 3 -dione(d) butan-2-one
A hydrocarbon $\mathrm{C}_{6} \mathrm{H}_{12}$ decolourizes bromine solution and yields n-hexane on hydrogenation. On oxidation with $\mathrm{KMnO}_{4}$ it forms two different monobasic acids of the type RCOOH. The compound is(a) hex-2-ene(b) hex-3-ene(c) cyclohexene(d) hex-1-ene
The most reactive species among the followin towards sulphonation is(a) toluene(b) nitrobenzene(c) 1,3 -dimethyl benzene(d) chlorobenzene
$18 \mathrm{C}-\mathrm{H}$ and $7 \mathrm{C}-\mathrm{C}$ sigma bonds are present in(a) n-heptane(b) cyclohexane(c) 3,3 -dimethyl pentane(d) $2,2,3$-trimethyl pentane
Match the following:List I List II(Petroleum fractions) $\quad$ (Approximate composition)1. gasoline(i) $\mathrm{C}_{10}$ to $\mathrm{C}_{15}$2. kerosene(ii) $\mathrm{C}_{6}$ to $\mathrm{C}_{8}$3. lubricating oil(iii) $\mathrm{C}_{30}$ to $\mathrm{C}_{40}$4. pitch and asphalt(iv) $\mathrm{C}_{17}$ to $\mathrm{C}_{20}$The correct matching is:1$\begin{array}{lll}2 & 3 & 4\end{array}$(a) (ii)(i)(iii)(iv)(b) (i)(iii)(iv)(ii)(c) (i)(ii)(iv)(iii)(d) (ii)(i)(iv)(iii)
Which one of the following is aromatic in nature?(a)<smiles>OC1CCCCC1</smiles>(b)<smiles>O=C1CCCCC1</smiles>(c)(d)<smiles>C1CCCCC1</smiles>
Cyclooctatetraene is not aromatic. The most important reason for this is that(a) it is a planar molecule(b) it has eight $\pi$-electrons(c) its structure cannot be described by more than the canonical forms(d) its structure is not that of regular octagon
Which of the following reactions will yield 2 2-dibromopropane?(a) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHBr}+\mathrm{HBr} \longrightarrow$(b) $\mathrm{HC} \equiv \mathrm{CH}+2 \mathrm{HBr} \longrightarrow$(c) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HBr} \longrightarrow$(d) $\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CH}+2 \mathrm{HBr} \longrightarrow$
Toluene reacts with methyl chloride in presence of anhydrous aluminium chloride to form mainly m-xylene. This is because(a) $\mathrm{CH}_{3}-$ group has $+\mathrm{I}$ effect(b) $\mathrm{CH}_{3}-$ group is meta directing(c) m-xylene is thermodynamically most stable of the other xylenes(d) hyperconjugation effect of $\mathrm{CH}_{1}-$ group
Match the following:List I List II1. benzene(i) phosgene2. ethylene(ii) silver mirror3. acetaldehyde(iii) mustard gas4. chloroform(iv) $(4 \mathrm{n}+2) \pi$-electrons(v) carbylamineThe correct matching is:$1 \quad 2$$3 \quad 4$(a) (iv)(iii) (i)(ii)(b) (iv)(iii) (ii)(i)(c) (iii)(iv)(ii)(i)(d) (ii) (i)(iv)(iii)
Ozonolysis of 2,3 -dimethyl-1-butene followed by reduction with zinc and water gives(a) methanoic acid and 3-methyl-2-butanone(b) methanal and 3 -methyl-2-butanone(c) methanal and 2-methyl-3-butanone(d) methanoic acid and 2-methyl-3-butanone
when treated with two equivalents $\mathrm{Na}$ in dry ether gives(a)<smiles>BrC1CCCC1</smiles>(b)<smiles>ClC1CCCC1</smiles>(c)(d)<smiles>C1CC1</smiles>
The number of structural and configurational isomers of a bromo compound, $\mathrm{C}_{5} \mathrm{H}_{9} \mathrm{Br}$, formed by the addition of HBr to 2 -pentyne respectively are(a) 1 and 2(b) 2 and 4(c) 4 and 2(d) 2 and 1
Compare the $\mathrm{C}-\mathrm{H}$ bond lengths of the following hydrocarbons:1. $\mathrm{CH}_{3}-\mathrm{CH}_{3}$2. $\mathrm{CH}_{2}=\mathrm{CH}_{2}$3. $\mathrm{CH} \equiv \mathrm{CH}$The decreasing order of $\mathrm{C}-\mathrm{H}$ bond lengths is $\begin{array}{ll}\text { (a) } 3,2,1 & \text { (b) } 1,23\end{array}$(c) $2,1,3$
A hydrocarbon $\mathrm{C}_{6} \mathrm{H}_{10}$ does not react with ammonical solution of $\mathrm{Cu}^{+}$ions; it adsorbs $2 \mathrm{~mol}$ of hydrogen on catalytic hydrogenation to give 2 -methylpentane. The hydrocarbon adds one molecule of water on treatment with $\mathrm{Hg}^{2+} / \mathrm{H}_{2} \mathrm{SO}_{4}$. The structure of given compound is(a) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$(b) $\mathrm{H}_{3} \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2}$(c)<smiles>C=C=CC(=C)C</smiles>(d) $\mathrm{HC}=\mathrm{C}-\mathrm{CH}_{2}-\mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2}$
Among the following compounds which has more than one type of hybridization for carbon atom?I. $\mathrm{CH}_{3} \cdot \mathrm{CH}_{2} \cdot \mathrm{CH}_{2} \cdot \mathrm{CH}_{3}$II. $\mathrm{CH}_{3} \cdot \mathrm{CH}^{2}=\mathrm{CH}^{2} \cdot \mathrm{CH}_{3}$III. $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{CH}$IV. $\mathrm{CH}_{2}=\mathrm{CH}_{2}$(a) II only(b) II and III(c) I and III(d) III and IV
Match the following:List I List II1. ethane(i) 2 sp carbons2. ethylene(ii) $6 \mathrm{sp}^{2}$ carbons3. acetylene(iii) $2 \mathrm{sp}^{3}$ carbons4. benzene(iv) $2 s p^{2}$ carbons(v) $1 \mathrm{sp}$ and $1 \mathrm{sp}^{2}$ carbons
In the following sequence of reactions, what is $\mathrm{D}$ ?<smiles>Cc1ccccc1</smiles>(a) primary amine(b) an amide(c) phenyl isocyante(d) a chain lengthened hydrocarbon
Among the following, the anti-aromatic compound(s) s/are1)(2)<smiles>[C+]1C=CC=C1</smiles>(3)<smiles>c1ccccc1</smiles>(4)<smiles>C1=CC1</smiles>(a) 1,2 and 3(b) 2,3 and 4(c) 1 and 4
In the following reaction:$\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHC} \equiv \mathrm{CH} \stackrel{\text { Step } 1}{\longrightarrow}$Which of the following sets of reagents can be used for step I and step II?Step I Step II(1) $\mathrm{HBr}$ HBr and peroxide(2) HBr and peroxide HBr(3) $\mathrm{Br}_{2}$$\mathrm{HBr}$(4) $\mathrm{Br}_{2}$HBr and peroxideSelect the correct answer using the codes given below:(a) 1 alone(b) 1 and 2(c) 1,2 and 3(d) 1,2 and 4
In the following sequence of reactions the end product $P$ is$\mathrm{C}_{2} \mathrm{H}_{5}$(a)<smiles>C=Cc1ccc(Cl)cc1</smiles>(b)<smiles>ClC=C(Cl)c1ccccc1</smiles>(c)<smiles>ClC=Cc1ccccc1</smiles>(d)<smiles>C=Cc1cccc(Cl)c1</smiles>
The heat of hydrogenation of benzene is $50 \mathrm{kcal} /$ mol. The resonance energy of benzene is $36 \mathrm{kcal} /$ mol. The heat of hydrogenation of cyclohexene is approximately(a) $9 \mathrm{kcal} / \mathrm{mol}$(b) $19 \mathrm{kcal} / \mathrm{mol}$(c) $29 \mathrm{kcal} / \mathrm{mol}$(d) $27 \mathrm{kcal} / \mathrm{mol}$
The heat of hydrogenation of benzene is $51 \mathrm{kcal} / \mathrm{mol}$ and its resonance energy is $36 \mathrm{kcal} / \mathrm{mol}$. Then the heats of hydrogenation of cyclohexadiene and cyclohexene are respectively(a) $58 \mathrm{kcal}, 29 \mathrm{kcal}$(b) $28 \mathrm{kcal}, 59 \mathrm{kcal}$(c) $58 \mathrm{kcal}, 49 \mathrm{kcal}$(d) $29 \mathrm{kcal}, 48 \mathrm{kcal}$
Consider the following compounds:1. $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CHCl}-\mathrm{CH}_{3}$2. $\mathrm{CH}_{2}=\mathrm{CH}^{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{Cl}$3. $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{Cl}$These compounds are dehydrohalogenated by treatment with a strong base under identical conditions. The correct sequence of the increasing order of reactivity of these compounds in the given reaction is(a) $3,1,2$(b) $3,2,1$(c) $1,2,3$(d) $2,1,3$
Consider the following compounds:1. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}$2. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_{3}$3. $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}$These compounds are dehydrated by treatment with sulphuric acid. The correct sequence of increasing order of the reactivity of these three compounds towards dehydration is(a) $1,3,2$(b) $1,2,3$(c) $2,1,3$(d) $3,1,2$
Match the following:List I List II (Reagent) $\quad$ (Electrophiles)1. $\mathrm{Cl}_{2}+\mathrm{AlCl}_{3}$(i) $\mathrm{NO}_{2}$2. $\mathrm{HNO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}$(ii) $\mathrm{Cl}_{\cdots}$.. $\mathrm{Cl} \ldots \mathrm{AlCl}_{3}$ or $\mathrm{Cl}^{+}$3. $\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}$(iii) $\mathrm{SO}_{3} \mathrm{H}$ (or $\left.\mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{SO}_{3}\right)$4. $\mathrm{Br}_{2}+\mathrm{Fe}$(iv) $\mathrm{SO}_{3}$(v) Br... Br...FeBr $_{3}$ or $\mathrm{Br}^{+}$
Consider the following sequence of reactions and decide the end product $\mathrm{Y}$.<smiles>CC1=C(C)CCC1</smiles>(a)<smiles>CC1(C)CCCC1(C)O</smiles>(b)<smiles>CC(=O)C1=C(C)CC1</smiles>(c)<smiles>CC1=CC(=O)CCC1</smiles>(d) $\mathrm{CH}_{3} \mathrm{COCH}, \mathrm{CH}, \mathrm{CH}_{2} \mathrm{COCH}_{3}$
Place the following compounds in the decreasing order of their relative reactivity with electrophile $\left(\mathrm{E}^{+}\right)$.1. p-nitrochlorobenzene2. 2, 4 -dinitrochlorobenzene3. chlorobenzene(a) $3>1>2$(b) $1>2>3$(c) $2>1>3$(d) $3>2>1$
Consider the given statements about the molecule $\left(\mathrm{H}_{3} \mathrm{C}\right)_{2} \mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{C}=\mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2}$1. three carbons are sp $^{3}$ hybridized2, three carbons are sp $^{2}$ hybridized3. two carbons are sp hybridized Of these statements(a) 1 and 2 are correct(b) 1 and 3 are correct(c) 2 and 3 are correct(d) all are correct
Which one of the following would, on ozonolysis, yields $\mathrm{CH}_{3} \mathrm{COCH}_{3}$ and $\mathrm{CH}_{2}(\mathrm{CHO})_{2}$ in the ratio $1: 1 ?$(a) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$(b) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$(c) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$(d) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{C}\left(\mathrm{CH}_{3}\right)=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}-$$\mathrm{CH}_{3}$
Viscosity coefficients of some liquids are given below:Liquid $\eta$ in millipoise at $30^{\circ} \mathrm{C}$$\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{CH}_{3}$$2.11$$\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{CH}_{3}$$2.89$$\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{5} \mathrm{CH}_{3}$$3.68$The order of viscosity coefficient of the liquids(1) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$(2)<smiles>CCC(C)CC</smiles>(3)<smiles>CC(C)C(C)C</smiles>(a) $1>2>3$(b) $1<2<3$(c) $1>2=3$(d) remains same
The products formed when bromocylohexane and sodium propynide are heated together are(a) cyclohexene(b) 2 - cyclohexyl propyne(c) propyne(d) $1-$ cyclohexyl propene
In the given compounds.(I) $\mathrm{Ph}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{F}$(II)<smiles>CC(C)(Br)c1ccccc1</smiles>(III) $\mathrm{Ph}-\mathrm{CD}_{2}-\mathrm{CD}_{2}-\mathrm{F}$Which of the following option (s) is/are correct?(a) Compound (I) or compound (III) $\frac{\mathrm{OH}^{-} / \Delta}{\mathrm{D}_{2} \mathrm{O}}$Same products(b) Compound (II) $\frac{\mathrm{KOH}}{\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{OH}} \rightarrow($ an alkene)(c) Compound (I) $\frac{\mathrm{OH}^{-}}{\mathrm{D}_{2} \mathrm{O}^{-}} \rightarrow \mathrm{Ph}-\mathrm{Cd}=\mathrm{CH}_{2} .$(major product)(I) $\frac{\mathrm{RO}^{-}}{\mathrm{D}_{2} \mathrm{O}} \rightarrow(\mathrm{A}) \frac{\mathrm{O}_{3}}{\left(\mathrm{CH}_{3}\right)_{i} \mathrm{~S}} \rightarrow(\mathrm{B})+(\mathrm{C})$(d) Compound$\frac{\mathrm{OH} / \mathrm{H}_{2} \mathrm{O}}{\text { Conc. }}$
In the given compounds.(I) $\mathrm{Ph}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{F}$(II)(III) $\mathrm{Ph}-\mathrm{CD}_{2}-\mathrm{CD}_{2}-\mathrm{F}$Which of the following option (s) is/are correct?(a) Compound (I) or compound (III) $\frac{\mathrm{OH}^{-/ \Delta}}{\mathrm{D}_{2} \mathrm{O}}$Same products(b) Compound (II) $\frac{\mathrm{KOH}}{\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{OH}} \rightarrow$ (an alkene)(c) Compound (I) $\frac{\mathrm{OH}^{-}}{\mathrm{D}_{2} \mathrm{O}^{-}} \rightarrow \mathrm{Ph}-\mathrm{Cd}=\mathrm{CH}_{2}$.(major product)(d) Compound (I) $\frac{\mathrm{RO}^{-}}{\mathrm{D}_{4} \mathrm{O}} \rightarrow(\mathrm{A}) \frac{\mathrm{O}_{3}}{\left(\mathrm{CH}_{3}\right)_{\mathrm{i}} \mathrm{S}} \rightarrow(\mathrm{B})+(\mathrm{C})$
${ }^{4} \mathrm{X}^{\prime}$ is(a)<smiles>C1CC2CCC12</smiles>(b)(c)(d)
Predict the product of given reaction(a)(b)(c)(d) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$
Number of stereoisomeric products are written against each reaction. Find the correct match (es).(a)<smiles>CC1=CCCCC1</smiles>(b)<smiles>CC=CC</smiles>(c)<smiles>CC=CC</smiles>(d) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{C}_{2} \mathrm{H}_{5}$$\frac{\mathrm{H}_{2}}{\mathrm{Ni}}-3$(cis- trans)
The correct reactions are(a) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HBr} \rightarrow$$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br}$(b) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HCl} \rightarrow$$\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{Cl})-\mathrm{CH}_{3}$(c) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HI} \stackrel{\text { peroxide }}{\longrightarrow}$$\mathrm{CH}_{3}-\mathrm{CHI}^{2}-\mathrm{CH}_{3}$(d) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HBr} \stackrel{\text { penxide }}{\longrightarrow}$$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br}$
Choose the correct statement(s):$\underline{\text { Ozonolysis }}{\longrightarrow}$ A<smiles>CC1=CCCCC1</smiles>(A) $\underline{\text { dil } \mathrm{OH}^{-}} \rightarrow \mathrm{B}$(B) Oxidation $\longrightarrow$ C(C)(D)(a) (A) is 2-ketoheptanal(b) $(\mathrm{B})$ is<smiles>CC(=O)C1CCCC1O</smiles><smiles>CC(=O)C1CCCC1=O</smiles>(c) $(\mathrm{C})$ is(d) (D) can be open chain structure while(E) is a close ring structure
For which of the following given compounds degree of unsaturation is $-3$ ?(a)<smiles>C=CC=CC</smiles>(b)(c)<smiles>C=CC1=CCC1</smiles>(d)
In which of the following cas e (s), the heat of hydration is correctly shown ?(a)<smiles>CC=CC</smiles><smiles>CC=CCC</smiles>$>\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CH}_{2}$(b)(c)<smiles>C=C1CCC(C)CC1</smiles><smiles>CC1=CCC(C)CC1</smiles><smiles>CC1=C(C)CCCC1</smiles>
Which of the following statement is/are correct?a) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}+\mathrm{H}_{2} \stackrel{N i}{\longrightarrow}$ product; the rate of reac-tion is $\mathrm{k}_{1}$. $\mathrm{HC} \equiv \mathrm{CH}+\mathrm{H}_{2} \stackrel{\mathrm{Ni}}{\longrightarrow}$ product; the rate of reactionis $\mathrm{k}_{2}$.Then $\mathrm{k}_{2}>\mathrm{k}_{1}$b) Dehydration of alcohol is equally facilitated in acid as in basic medium.c) The trans stereoisomer is formed when cyclohexene is brominated in presence of $\mathrm{CCl}_{4}$.d)<smiles>ClC(Cl)CC1(Br)CCCC1</smiles>
Which of the following reagent (s) is/are used in the following chemical reaction? $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2} \longrightarrow \mathrm{CH}_{2}-\mathrm{CO}-\mathrm{CO}-\mathrm{CH}_{2} \mathrm{CH}_{3}$(a) Reductive ozonolysis(b) $1 \% \mathrm{HgSO}_{4}$ dil. $\mathrm{H}_{2} \mathrm{SO}_{4}$(c) Cold aq. Dilute alkaline $\mathrm{KMnO}_{4}$(d) Reaction with $\mathrm{Br}_{2}-\mathrm{H}_{2} \mathrm{O}$
In which of the following case(s), the product contains a cyclopentene ring? (Consider the major product).(a)<smiles>C=C1CCCC1</smiles><smiles>CC(C)(C)C</smiles>(b)<smiles>BrCC1CCC1</smiles><smiles>CC(C)O</smiles>(c)<smiles>OC1CCCC1</smiles><smiles>BrCC1CCC1</smiles> (d) $\quad \frac{\mathrm{KOH}}{\text { alcohol }}$
$4-$ hexadiyne $\left(\mathrm{C}_{6} \mathrm{H}_{6}\right)$ is allowed to react with $\mathrm{Li}$n $\mathrm{NH}_{3}($ liq $)$. The product obtained is treated with 1 equivalent of $\mathrm{Br}_{2}$ in $\mathrm{CCl}_{4}$. Which of the following constitutional isomers are possible products?(a)<smiles>CC=CC(Br)C(C)Br</smiles>(b)<smiles>CC(Br)C=CC(C)Br</smiles>(c)<smiles>CCCC=CC(C)Br</smiles>(d)<smiles>CCC=CC(Br)CBr</smiles>
The structure of compound (B) is(a) $\mathrm{n}-\mathrm{C}_{5} \mathrm{H}_{11}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Cl}$(b) $\mathrm{n}-\mathrm{C}_{5} \mathrm{H}_{11}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}$(c)(d)
The product (C) in the reaction sequence will be(a) $\mathrm{n}-\mathrm{C}_{5} \mathrm{H}_{11}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{C}_{10} \mathrm{H}_{21}-\mathrm{n}$(b) $\mathrm{n}-\mathrm{C}_{5} \mathrm{H}_{11}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{C}_{10} \mathrm{H}_{21}-\mathrm{n}$(c)(d) $\mathrm{n}-\mathrm{C}_{5} \mathrm{H}_{11}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}(\mathrm{OH}) \mathrm{C}_{10} \mathrm{H}_{21}-\mathrm{n}$
The correct structure of compound (E) will be(a)(b)(c)(d)
$\mathrm{CH} \equiv \mathrm{CH}+\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{OH} \stackrel{\mathrm{HgSO}_{4}}{-\mathrm{Y}} \stackrel{\mathrm{H}_{2} \mathrm{O}}{\longrightarrow \mathrm{X}}$$\mathrm{X}$ is(a) $\mathrm{CH}_{3} \mathrm{OH}$(b) $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$(c) $\mathrm{CH}_{3} \mathrm{CHO}+\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$(d) $\mathrm{CH}_{2}=\mathrm{CHOH}^{2}$
Which of the following statements is not true?(a) Acetylene is used in the preparation of butadiene.(b) Butyne $-1$ gives red precipitate with ammoniacal cuprous chloride but Butyne $-2$ will not(c) The number of sigma and pi- bonds in 1 - butene $-3$ - yne are 8 and 4 respectively(d) Propene when heated with chlorine at $500^{\circ} \mathrm{C}$ forms $\mathrm{CH}_{2} \mathrm{ClCH}=\mathrm{CH}_{2}$.
Which of the following statements is not true ?(a) Acetylene is used in the preparation of butadiene.(b) Butyne $-1$ gives red precipitate with ammoniacal cuprous chloride but Butyne $-2$ will not(c) The number of sigma and pi- bonds in 1 - butene $-3$ - yne are 8 and 4 respectively(d) Propene when heated with chlorine at $500^{\circ} \mathrm{C}$ forms $\mathrm{CH}_{2} \mathrm{ClCH}=\mathrm{CH}_{2}$.
Which of the following reactions will yield 2 , 2- dibromopropane?(a) $\mathrm{CH} \equiv \mathrm{CH}+2 \mathrm{HBr} \longrightarrow$(b) $\mathrm{H}_{2} \mathrm{CC} \equiv \mathrm{CH}+2 \mathrm{HBr} \longrightarrow$(c) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HBr} \longrightarrow$(d) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHBr}+\mathrm{HBr} \longrightarrow$
Which one of the following reactions gives a ary alcohol?(a) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\text { peroxide }}{\mathrm{HBr}} \stackrel{\mathrm{H}_{2} \mathrm{O}, \mathrm{OH}^{-}}{\longrightarrow}$(b) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\text { (i) } \mathrm{BH}_{3}(\mathrm{THF})}{\text { (ii) } \mathrm{H}_{2} \mathrm{O}_{2}, \mathrm{OH}^{-}}$(c) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\mathrm{H}_{2} \mathrm{SO}_{4}}{\mathrm{H}_{2} \mathrm{O}}$(d) $\underbrace{\mathrm{CH}_{2}-\mathrm{CH}_{2}}_{\mathrm{O}} \frac{\text { (i) } \mathrm{CH}_{3} \mathrm{MgBr}}{\text { (ii) } \mathrm{H}_{1} \mathrm{O}^{+}}$
Identify the product of the following reaction.<smiles>CC(C)C=CCO</smiles> Product(a)<smiles>CC(C)C(C)O</smiles>(b) $\mathrm{CH}_{3}-\mathrm{CH}\left(\mathrm{CH}_{3}\right)-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{OH}$(c)<smiles>C=CC(C)(C)O</smiles>(d)<smiles>CCC(C)(C)O</smiles>
Match the followingColumn-I(a)<smiles>Cc1ccccc1C</smiles>(b)<smiles>C=CC=CO</smiles>(c)(d) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\mathrm{KMnO}_{4}}{110^{\circ} \mathrm{C}}$Column-II(p) $\mathrm{CH}_{3}-\mathrm{CO}$$-\mathrm{CHO}$(q)(r) $\mathrm{CH}_{3}-\mathrm{CO}$$-\mathrm{CO}-\mathrm{CH}_{3} \ldots$(s)<smiles>COC(=O)O</smiles>(t) HCHO
Column-I(a)<smiles>C#CC1CCCCCC1</smiles>(b)(c) $\mathrm{HC} \equiv \mathrm{CH} \diamond \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{C}$$\equiv \mathrm{CH}$(d) $\mathrm{HC} \equiv \mathrm{CH} \diamond \mathrm{CH} \equiv \mathrm{C}-\mathrm{C}$$\equiv \mathrm{CH}$Column-II -(p) $\mathrm{Cu}_{2} \mathrm{Cl}_{2} /$ $\mathrm{CH}_{3} \mathrm{OH} /$Pyridine / Air(q) $\mathrm{NH}_{4} \mathrm{Cl}$$-\mathrm{Cu}_{2} \mathrm{Cl}_{2}$(r) Red hot $\mathrm{Fe}$(s) $\mathrm{Ni}(\mathrm{CN})_{2}$
$$\begin{aligned}&\text { Match the following }\\&\begin{array}{ll}\hline \text { Column-I } & \text { Column-II } \\\hline \text { (a) Hydrocarboration of } & \text { (p) Primary alcohol } \\\text { simplest unsaturated } & \\\text { hydrocarbon followed } & \\\text { by } \mathrm{H}^{+} . & \\\text {(b) } \text { Red P/HI reduces. } & \text { (q) Alkane } \\\text { (c) Reductive ozonlysis } & \text { (r) Aldehyde } \\\text { (d) Pyrolysis of xanthate } & \text { (s) Alkene } \\& \text { (t) Reaction has syn } \\\text { stereochemistry } \\\hline\end{array}\end{aligned}$$
Column-I(a) Benzene(b) Neopentane(c) Buta $-1,3$ - diene(d) $2,2,3,3$ - Tetramethyl butaneColumn-II(p) Forms only one mono chloro derivative(q) Aromatic(r) Has only $\mathrm{sp}^{2}$ hybridised carbon atoms(s) Undergoes 1,2 and 1,4 -addition(t) Does not show resonance
How many isomeric products are obtained on com-<smiles>C=C1CCCC(=C)C1</smiles> plete catalytic hydrogenation of
2 - chlorobutane is treated with alcoholic $\mathrm{KOH}$ Number of alkenes formed is
$\mathrm{CH}_{3}-\mathrm{CH}_{2} \mathrm{Na}+\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br} \longrightarrow$ Numberof hydrogen atoms attached to $\mathrm{sp}^{2}$ carbon in the product is
$0-$ Xylene is methylated to get trimethyl benzene. The number of possible isomers is
Find the total number of monochlorinated products formed from the pure reactant given below :<smiles>C=CC(C)C</smiles>$\left(*-{ }^{14} \mathrm{C}\right.$-atom $)$
$\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3} \stackrel{\mathrm{HBr}}{\rightarrow}$ product $(\mathrm{s})$Number of products possible in the above reaction is
Give the number of carbon atoms present in the ring formed in compound (C).
The number of monochloro derivatives that of the following, the number of compounds that can react with Tollen's reagent is
Of the following reagents the number of them wh will react with $\mathrm{CH}_{3} \mathrm{MgBr}$ to give $\mathrm{CH}_{4}$ is$\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}, \mathrm{CH}_{3} \mathrm{SH}, \mathrm{CH}_{3} \mathrm{NH}_{2}, \mathrm{RC} \equiv \mathrm{CR}, \mathrm{HCHO}$$\mathrm{RC} \equiv \mathrm{CH}$
Total number of monochlorination products that can be obtained on treating 1 - butene with $\mathrm{Cl}_{2}$ in presence of light is
In an experimental determination of active hydrogens in an organic compound $(\mathrm{Z}), 0.450 \mathrm{~g}$ of compound $(\mathrm{Z})$ was treated with excess of $\mathrm{CH}_{3} \mathrm{MgBr}$ when $224 \mathrm{ml}$ of $\mathrm{CH}_{4}$ was evolved at NTP. Compound (Z) has molar mass equal to $90 \mathrm{~g}$ per mole. How many active hydrogens are present per molecule of the compound $(Z) ?$
The number of possible enantiomeric pairs that can be produced during monochlorination of $2-$ methyl butane is
On vigorous oxidation by permanganate solution, $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CHCH}_{2} \mathrm{CHO}$ gives[2002](a) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CO}$ and $\mathrm{OHCCH}_{2} \mathrm{CHO}$(b)<smiles>CC(O)C(O)CC=O</smiles>(c) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CO}$ and $\mathrm{OHCCH}_{2} \mathrm{COOH}$(d) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CO}$ and $\mathrm{CH}_{3} \mathrm{COOH}$
Acetylene reacts with hypochlorous acid to form $[2002]$(a) $\mathrm{Cl}_{2} \mathrm{CHCHO}$(b) $\mathrm{ClCH}_{2} \mathrm{COOH}$(c) $\mathrm{CH}_{3} \mathrm{COCl}$(d) $\mathrm{ClCH}_{2} \mathrm{CHO}$
Acetylene does not react with $\quad[\mathbf{2 0 0 2}]$(a) $\mathrm{Na}$(b) ammonical $\mathrm{AgNO}_{3}$(c) $\mathrm{HCl}$(d) $\mathrm{NaOH}$
On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. This alkane could be [2003](a) propane(b) pentane(c) isopentane(d) neopentane
Which one of the following has the minimum boiling point?(a) $\mathrm{n}$-butane(b) 1 -butyne(c) 1 -butene(d) iso-butene
Acid catalysed hydration of alkenes except ethene leads to the formation of(a) primary alcohol(b) secondary or tertiary alcohol(c) mixture of primary and secondary alcohols(d) mixture of secondary and tertiary alcohols
Elimination of bromine from 2-bromobutane results in the formation of(a) equimolar mixture of 1 and 2 -butene(b) predominantly 2-butene(c) predominantly 1 -butene(d) predominantly 2-butyne
Reaction of one molecule of $\mathrm{HBr}$ with one molecule of 1,3 -butadiene at $40^{\circ} \mathrm{C}$ gives predominantly [2005](a) 3-bromobutene under kinetically controlled conditions(b) 1-bromo-2-butene under thermodynamically controlled conditions(c) 3-bromobutene under thermodynamically controlled conditions(d) 1-bromo-2-butene under kinetically controlled conditions.
HBr reacts with $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{OCH}_{3}$ under anhydrous conditions at room temperature to give $\quad$ [2006](a) $\mathrm{CH}_{3} \mathrm{CHO}$ and $\mathrm{CH}_{3} \mathrm{Br}$(b) $\mathrm{BrCH}_{2} \mathrm{CHO}$ and $\mathrm{CH}_{3} \mathrm{OH}$(c) $\mathrm{BrCH}_{2}-\mathrm{CH}_{2}-\mathrm{OCH}_{3}$(d) $\mathrm{H}_{3} \mathrm{C}-\mathrm{CHBr}-\mathrm{OCH}_{3}$
The structure of the compound that gives a tribromo derivative on treatment with bromine water is [2006](a)<smiles>Cc1cccc(O)c1</smiles>(b)<smiles>OCc1ccccc1</smiles>(c)<smiles>Cc1ccccc1O</smiles>(d)<smiles>Cc1ccc(O)cc1</smiles>
The reaction of toluene with $\mathrm{Cl}_{2}$ in presence of $\mathrm{FeCl}_{3}$ gives predominantly: $\quad[\mathbf{2 0 0 7}]$(a) benzyl chloride(b) 0 - and p-chlorotoluene(c) m-chlorotoluene(d) benzoyl chloride
The compound formed as a result of oxidation of ethyl benzene by $\mathrm{KMnO}_{4}$ is:[2007](a) acetophenone(b) benzoic acid(c) benzyl alcohol(d) benzophenone
Which of the following reactions will yield 2,2 dibromopropane? $\quad$ [2007](a) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHBr}+\mathrm{HBr} \longrightarrow$(b) $\mathrm{CH} \equiv \mathrm{CH}+2 \mathrm{HBr} \longrightarrow$(c) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HBr} \longrightarrow$(d) $\mathrm{CH}_{3}-\mathrm{C}=\mathrm{CH}+2 \mathrm{HBr} \longrightarrow$
The treatment of $\mathrm{CH}_{3} \mathrm{MgX}$ with $\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{C}-\mathrm{H}$ pro-duces(a) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}$(b) $\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}$(c)<smiles>CC=CC</smiles>(d) $\mathrm{CH}_{4}$
Toluene in nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotized and then heated with cuprous bromide. The reaction mixture so formed contains $\quad$ [2008](a) Mixture of o-and p-bromotoluenes(b) Mixture of o- and p-dibromobenzenes(c) Mixture of o- and p-bromoanilines(d) Mixture of o- and m-bromotoluenes
In the following sequence of reactions, the alkene affords the compound 'B'$\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3} \stackrel{\mathrm{O}_{3}}{\longrightarrow}$ (A) $\stackrel{\mathrm{H}_{2} \mathrm{O}}{\mathrm{Zn}}$ (B)The compound (B) is(a) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}$(b) $\mathrm{CH}_{3} \mathrm{COCH}_{3}$(c) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{3}$(d) $\mathrm{CH}_{3} \mathrm{CHO}$
The hydrocarbon which can react with sodium in liquid ammonia is(a) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$(b) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CH}$(c) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3}$(d) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{3}$
In electrophile, $\mathrm{E}^{\oplus}$ attacks the benzene ring to generate the intermediate $\sigma$-complex. Of the following, which $\sigma$-complex is of lowest energy? $\quad[\mathbf{2 0 0 8}]$(a)(b)<smiles>FC(F)(F)c1ccccc1</smiles>(c)<smiles>O=[N+]([O-])c1ccccc1F</smiles>(d)<smiles>O=[N+]([O-])c1cccc(F)c1</smiles>
The alkene that exhibits geometrical isomerism is: [2009](a) 2-methyl propene(b) 2 -butene(c) 2 -methyl-2-butene(d) propene
One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molcular mass of 44u. The alkene is(a) Propene(b) 1 -butene(c) 2 -butene(d) ethane
The main product of the following reaction is$\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{CH}(\mathrm{OH}) \mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2} \stackrel{\text { conc. } \mathrm{H}_{2} \mathrm{SO}_{4}}{\longrightarrow}$ ? [2010](a)<smiles>CC=CC(C)C</smiles>(b)<smiles>CC(C)=CCc1ccccc1</smiles>(c)<smiles>CC(C)C=Cc1ccccc1</smiles>(d)<smiles>CCCC(Cl)(Cl)Cl</smiles>
Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of(a) a vinyl group(b) an isopropyl group(c) an acetylenic triple bond(d) two ethylenic double bonds
2-Hexyne gives trans $-2$-Hexene on treatment with [2012](a) $\mathrm{Pd} / \mathrm{BaSO}_{4}$(b) $\mathrm{Li} / \mathrm{NH}_{3}$(c) $\mathrm{Pt} / \mathrm{H}_{2}$(d) $\mathrm{LiAlH}_{4}$
Which branched chain isomer of the hydrocarbon with molecular mass 72 u gives only one isomer of mono substituted alkyl halide?(a) Isohexane(b) Neopentane(c) Tertiary butyl chloride(d) Neohexane
A gaseous hydrocarbon given upon combustion $0.72 \mathrm{~g}$ of water and $3.08 \mathrm{~g}$ of $\mathrm{CO}_{2}$. The empirical formula of the hydrocarbon is(a) $\mathrm{C}_{6} \mathrm{H}_{5}$(b) $\mathrm{C}_{7} \mathrm{H}_{8}$(c) $\mathrm{C}_{2} \mathrm{H}_{4}$(d) $\mathrm{C}_{3} \mathrm{H}_{4}$
The major organic compound formed by the reaction of $1,1,1$-trichloroethane with silver powder is:(a) 2-Butyne(b) 2-Butene(c) Acetylene(d) Ethene
Which compound would give 5 -keto-2-methyl hexanal upon ozonolysis? $[\mathbf{2 0 1 5}]$(a)<smiles>CC1CCCC1C</smiles>(b)<smiles>CC1CCC(C)C1</smiles>(c)<smiles>CC1CCC(C)C1</smiles>(d)<smiles>CC1CCCC1C</smiles>