Section 1
JEE (Main) Exercises
Amino acid having no chiral centre is(A) Valine(B) Alanine(C) Glycine(D)Proline
Camphor and napthalene can be purified by1(A) Recrystallisation(B) Fractional distillation(C) Filtration(D) Sublimation
The pollutants which come directly in the air from sources are called primary pollutants. Primary pollutants aresometimes converted into secondary pollutants. Which of the following belongs to secondary air pollutants?(A) $\mathrm{CO}$(B) Hydrocarbon(C) Peroxyacetyl nitrate(D) $\mathrm{NO}$
$p K_{a}$ values for Alanine is $2.3$ and 9.7. Alanine would exist as a cation at pH equal to(A) $2.3$(B) 6(C) $9.7$(D) 12
Isoelectric point of Alanine is 6 . At which pH maximum concentration of zwitter ion of alanine will be present?(A) $\mathrm{pH}>6$(B) $\mathrm{pH}<6$(C) $\mathrm{pH}=6$(D) $\mathrm{pH}=7$
Mixture of anthracene and benzoic acid can be separated by(A) Fractional distillation(B) Sublimation(C) Chromatography(D) Filtration
Among the following, which is not a synthetic polymer?(A) Polythene(B) Buna-S(C) Cellulose(D) Nylon-6,6
Structure of glycine at $\mathrm{pH}=10.5$ is(A)(B)(C)(D) $\mathrm{CH}_{2}-\mathrm{COO}^{-}$ $\mathrm{NH}_{2}$
Glycine and Alanine can form how many sequence (primary structure) of Tripepetides?(A) 2(B) 6(C) 8(D) 4
Isoelectric point of Aspartic acid is(A) 2(B) 5(C) 3(D) $6.5$
The compound is/are(A) Aldohexose(B) Furanose(C) Pyranose(D) Both (A) and (C)
Glycerol is added to soap because it functions as(A) Afiller(B) To increase lathering(C) To prevent rapid drying(D) To make soap granules
In solution, glucose exists in how many isomeric forms?(A) Two(B) Sixteen(C) Three(D) Four
The most stable isomers of glucose is(A) Aldehydic form(B) $\alpha$-form(C) Keto form(D) $\beta$-form
The principle involved in paper chromatography is(A) Adsorption(B) Partition(C) Solubility(D) Volatility
Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the componentsof photochemical smog, identify it.(A) $\mathrm{NO}_{2}$(B) $\mathrm{O}_{3}$(C) $\mathrm{SO}_{2}$(D) Unsaturated hydrocarbon
The acid not present in acid rain is(A) Peroxyacetylnitrate(B) $\mathrm{H}_{2} \mathrm{CO}_{3}$(C) $\mathrm{HNO}_{3}$(D) $\mathrm{H}_{2} \mathrm{SO}_{4}$
Specific rotation of equilibrium mixture of the three forms of glucose is(A) $52.2^{\circ}$(B) $112^{\circ}$(C) $19.5^{\circ}$(D) $-90^{\circ}$
Which of the following polymers of glucose is stored by animals?(A) Cellulose(B) Amylose(C) Amylopectin(D) Glycogen
Which is a non-reducing sugar?(A) Lactose(B) Cellulose(C) Maltose(D) Sucrose
Glucose reacts with acetic anhydride to form(A) Mono acetate(B) Tetra acetate(C) Penta acetate(D) Hexa acetate
Which of the following is not a semisynthetic polymer?(A) cis-polyisoprene(B) Cellulose nitrate(C) Cellulose acetate(D) Vulcanised rubber
In the given reaction, value of $n$ isGlucose $+$ n Phenylhydrazine $\longrightarrow$ Osazone(A) Three(B) Two(C) One(D) Four
The consequences of global warming may be(A) Increase in average temperature of the earth(B) Melting of Himalayan Glaciers(C) Increased biochemical oxygen demand(D) All of these
At which carbon the following sugars are epimers of each other?(A) $\mathrm{C}-1$(B) $\mathrm{C}-2$(C) $\mathrm{C}-3$(D) $\mathrm{C}-4$
The incorrect statement is(A) Galactose and glucose are epimers(B) Glucose and mannose are anomers(C) Glucose and fructose both can show mutarotation(D) $\alpha$-D-Glucopyranose and $\beta$-D-Glucopyranose both are stereoisomers
Invert sugar is (A) Sucrose(B) Fructose(C) Glucose(D) Equimolar mixture of glucose and fructose
Which one of the following carbohydrates will show mutarotation? (A) Sucrose(B) Starch(C) Cellulose(D)Maltose
Select the biodegradable polymer.(A) Buna-S(C) PHBV(B) Nylon-2-Nylon-6 (D) Both (B) and (C)
Number of chiral centre in pyranose form of glucose is(A) 4(B) 6(C) 5(D) 3
Butyne-1 and butyne-2 can be distinguished by(A) $\mathrm{Br}_{2} / \mathrm{H}_{2} \mathrm{O}$(B) $\mathrm{NaOH}$(C) $\mathrm{Cu}_{2} \mathrm{Cl}_{2} / \mathrm{NH}_{4} \mathrm{OH}$(D) $\mathrm{H}_{2}-\mathrm{Pt}$
The commercial name of polyacrylonitrile is(A) Dacron(B) Orlon (acrolin)(C) $\mathrm{PVC}$(D) Bakelite
Prussian blue obtained in detection of nitrogen is(A) $\mathrm{Na}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$(B) $\mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}$(C) $\mathrm{Na}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NOS}\right]$(D) $\mathrm{Na}_{2}[\mathrm{Fe}(\mathrm{SCN})]$
Positive Tollen's test is not shown by
Yellow crystal of $\mathrm{CHI}_{3}$ is obtained using iodoform test by(A) $\mathrm{CH}_{3}-\mathrm{CH}_{2} \mathrm{OH}$(B) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{O}$(C) $\mathrm{CH}_{3}-\mathrm{C}-\mathrm{CH}_{2}-\mathrm{C}-\mathrm{CH}_{3}$(D) All of these
During determination of degree of alcohol by Victor Mayer test, red colour is obtained by(A) $3^{\circ}$ alcohol(B) $1^{\circ}$ alcohol(C) $2^{\circ}$ alcohol(D) All of these
The compounds which on treatment with dilute HNO $_{3}$ never gives ethyne as a product.(A) $\mathrm{CaC}_{2}$(B) $\mathrm{Ag}_{2} \mathrm{C}_{2}$(C) $\mathrm{Cu}_{2} \mathrm{C}_{2}$(D) $\mathrm{Be}_{2} \mathrm{C}$
Which compound never show positive iodoform test?(A) Lactic acid(B) Acetophenone(C) Benzophenone(D) Pyruvic acid
Monomer of nylon-66 is
Choose the correct option.(A) Invertase involvesDecomposition of urea into $\mathrm{NH}_{3}$ and $\mathrm{CO}_{2}$(B) Maltase involves Hydrolysis of cane sugar(C) Urease involves Hydrolysis of maltose into glucose(D) Zymase involves Conversion of glucose into ethyl alcohol
The Hinsberg test of a compound, $\mathrm{C}_{5} \mathrm{H}_{14} \mathrm{~N}_{2}$ produces a solid that is insoluble in $10 \%$ aq. $\mathrm{NaOH}$. This solid derivative dissolves in $10 \%$ aqueous sulphuric acid. Which of the following would best describe these facts?(A) $\mathrm{NH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{~N}\left(\mathrm{CH}_{3}\right)_{2}$(B) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NCH}_{2} \mathrm{CH}_{2} \mathrm{NHCH}_{3}$(C) $\mathrm{NH}_{2} \mathrm{CH}_{2} \mathrm{C}\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}$(D) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NCH}_{2} \mathrm{~N}\left(\mathrm{CH}_{3}\right)_{2}$
Which of the following statements is not true about classical smog?(A) Its main components are produced by the action of sunlight on emissions of automobiles.(B) Produced in cold and humid climate(C) It contains compounds of reducing nature(D) It contains smoke, fog and sulphur dioxide
Which of the following are used as antacids?(A) Aluminium and magnesium hydroxide(C) Metal hydroxides(B) $\mathrm{NaHCO}_{3}$(D) All of these
Which of the following is/are belongs to non-narcotic analgesic?(A) Morphine(B) Aspirin(C) Paracetamol(D) Both (B) and (C)
Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be(A) rich in dissolved oxygen(B) poor in dissolved oxygen(C) highly polluted(D) not suitable for aquatic life
Which of the following does not belong to broad spectrum antibiotics?(A) Penicilin G(B)Ampicilin(C) Amoxycillin(D) Chloramphenicol
Bithionol is added to soaps to impart properties of(A) Antipyretic(B) Antibiotic(C) Analgesic(D) Antiseptic
Which of the following statements is wrong?(A) Ozone is not responsible for green house effect.(B) Ozone can oxidise sulphur dioxide present in the atmosphere to sulphur trioxide.(C) Ozone hole is thinning of ozone layer present in stratosphere.(D) Ozone is produced in upper stratosphere by the action of UV rays on oxygen.
DNA and RNA contain four bases each. Which of the following bases is not present in RNA?(A) Adenine(B) Uracil(C) Thymine(D) Cytosine
Which of the following is used for weak antiseptic for eyes?(A) Iodoform(B) Tincture of iodine(C) Boric acid in dil. solution(D) Bithional
Which of the following is not disinfectant?(A) $0.2 \%$ of phenol(C) Chlorine in $0.2$ to $0.4 \mathrm{ppm}$(B) $\mathrm{SO}_{2}$ in very low concentration(D) $1 \%$ of phenol
Dettol is made of(A) Furacine(B) Chloroxylenol(C) Terpineol(D) Both (B) and (C)
Choose the incorrect option.(A) Iodoform is used as antispetic(B) 2 - $3 \%$ of iodine in alcohol water is known as tincture of iodine(C) Furacine is used as antispetic(D) Terpineol contains one chlorine
Which of the following statements is not true about low density polythene?(A) Tough(B) Hard(C) Poor conductor of electricity(D) Highly branched structure
Which of the following antihistamine does not affect secretion of acid?(A) Cimetidine(B) Ranitidine(C) Terfenadine(D) Histamine
Which of the following is not in class of tranquilizer called barbiturates?(A) Veronal(B) Amytal(C) Equanil(D) Luminal
Which of the following has highest and lowest value of sweetness respectively?(A) Aspartame, Alitame(B) Saccharin, Sucrolose(C) Alitame, Aspartame(D) Sucrolose, Alitame
Which of the following artificial sweetner contains chlorine?(A) Aspartame(B) Sucrolose(C) Saccharin(D) Alitame
Which of the following gases is not a green house gas?(A) $\mathrm{CO}$(B) $\mathrm{O}_{3}$(C) $\mathrm{CH}_{4}$(D) $\mathrm{H}_{2} \mathrm{O}$ vapour