Inorganic Chemistry for Jee mains and Advanced

Dr OP Tandon

Chapter 19

Environmental Chemistry - all with Video Answers

Educators

Chapter Questions

Problem 1

Biosphere includes:
(a) Hydrosphere only $\square$
(b) lithosphere only
(c) atmosphere only
$\square$ (d) all of these

Narayan Hari

Narayan Hari

Numerade Educator

Problem 2

Which one is not the correct statement? Pollution means:
(a) the presence of anything in the environment in excess of the required limit
(b) anything put into the environment which was not there in its natural state.
(c) direct or indirect changes in one or more components of the ecosystem which are not harmful to living organisms
(d) international release of any chemical substance in the environment with harmful effects

Narayan Hari

Numerade Educator

Problem 3

Which one is not a chemical pollutant?
(a) Noise
(b) Pesticides
(c) Liquid wastes
(d) Solid wastes

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Numerade Educator

Problem 4

Which is the main air pollutant?
(a) $\mathrm{CO}_{2}$
(b) $\mathrm{CO}$
(c) $\mathrm{N}_{2}$
(d) $S$

Narayan Hari

Numerade Educator

Problem 5

Which is not an air pollutant?
(a) $\mathrm{H}_{2}$
$\square$ (b) $\mathrm{H}_{2} \mathrm{~S}$
(c) $\mathrm{SO}_{2}$
$\square$ (d) $\mathrm{O}_{3}$

Narayan Hari

Numerade Educator

Problem 6

Which one is the bio-degradable pollutant?
(a) Lead compounds $\square$
(b) Mercuric salts
(c) Pesticides
$\square$ (d) Domestic wastes

Narayan Hari

Numerade Educator

Problem 7

Which one is not a correct statement?
(a) Primary pollutants are those which are emitted directly from the source
(b) Secondary pollutants are those which are formed in the atmosphere by chemical interactions among primary pollutants and atmospheric constituents
(c) Acid-rain is a primary pollutant
(d) Particulates refer to all atmospheric substances that are not gases

Narayan Hari

Numerade Educator

Problem 8

Which one of the following is an invaluable source of energy but does not cause pollution?
(a) Petroleum
$\square$ (b) Sun
(c) Fossil fuels
$\square$ (d) Nuclear energy

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Numerade Educator

Problem 9

The acid rain possesses:
(a) sulphuric acid $\square$
(b) nitric acid
(c) sulphurous acid $\square$
(d) all of these

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Numerade Educator

Problem 10

All except which cause pollution:
(a) thermal power plant
(b) hydro-electric plant
(c) nuclear power plant
(d) automobiles

Narayan Hari

Numerade Educator

Problem 11

DDT is:
(a) an antibiotic
(b) a fertilizer
(c). a non-degradable pollutant
(d) dichlorodifluorotitanium

Narayan Hari

Numerade Educator

Problem 12

Which one is not a water pollutant?
(a) Automobile exhaust
(b) Plant nutrients
(c) Oxygen demanding wastes
(d) Disease causing agents

Narayan Hari

Numerade Educator

Problem 13

Lung diseases are four times more in urban areas than rural areas. This is due to the presence of:
(a) $\mathrm{SO}_{2}$
$\square$ (b) $\mathrm{CO}_{2}$
(c) $\mathrm{N}_{2}$
$\square$ (d) water-vapour

Narayan Hari

Numerade Educator

Problem 14

The loss or reduction of chlorophyll in the leaves is termed:
(a) necrosis $\square$
(b) chlorosis
(c) epinasty
$\square$ (d) lichen

Narayan Hari

Numerade Educator

Problem 15

Which statement is not correct?
(a) $\mathrm{CO}$ is the main air pollutant
(b) All pollutants are not wastes
(c) Water is polluted by dissolved oxygen
(d) Lichens are pollution indicators

Narayan Hari

Numerade Educator

Problem 16

Which one is not correct? Greenhouse effect:
(a) is due to high concentration of $\mathrm{CO}_{2}$ in atmosphere $\square$
(b) is influenced by gases such as $\mathrm{CH}_{4}, \mathrm{O}_{3}$ and chlorofluorocarbons [
(c) would result in the warming up of the earth $\square$
(d) would result in lowering the level of oceans due to high evaporation

Narayan Hari

Numerade Educator

Problem 17

Which one is not a correct statement? To minimise pollution:
(a) manures and biofertilizers should be used in place of chemical fertilizers \hline
(b) all nuclear tests must be stopped
(c) green belts in cities should be developed
(d) domestic garbage must be burnt

Narayan Hari

Numerade Educator

Problem 18

Which is the most harmful for life on the globe?
(a) Deforestation
(b) Soil erosion
(c) Increasing desert
(d) Nuclear fall-out

Narayan Hari

Numerade Educator

Problem 19

If $\mathrm{BOD}$ of river is high, it means that the river is:
(a) not polluted
(b) very much polluted with inorganic chemicals
(c) very much polluted with organic chemicals which are decomposed by micro-organisms
(d) polluted with pesticides

Narayan Hari

Numerade Educator

Problem 20

Which of the following is produced by reaction of ultraviolet light?
(a) $\mathrm{CO}$
$\square$ (b) $\mathrm{SO}_{2}$
(c) $\mathrm{O}_{3}$
$\square$ (d) $\mathrm{NO}_{2}$

Narayan Hari

Numerade Educator

Problem 21

Earth is protected from UV-radiations by:
(a) ozone layer
$\square$ (b) nitrogen layer
(c) carbon dioxide
$\square$ (d) oxygen layer

Narayan Hari

Numerade Educator

Problem 22

Which air pollutant is not released by scooters and cars?
(a) $\mathrm{SO}_{2}$
$\square$ (b) Fly ash
(c) Hydrocarbons
$\square$ (d) $\mathrm{CO}$

Narayan Hari

Numerade Educator

Problem 23

Photo-chemical oxidants such as PAN or PBN are formed:
(a) by action or nitrogen oxides on hydrocarbons in presence of sunlight
(b) by action of carbon dioxide on hydrocarbons in presence of sunlight
(c) by action of hydrogen sulphide on hydrocarbons in presence of sunlight
(d) none of these

Narayan Hari

Numerade Educator

Problem 24

Fluorosis, a bone disease, is caused by the presence of:
(a) pesticides in water
(b) fluorides in water
(c) carbon monoxide in air
(d) sulphur dioxide in air

Narayan Hari

Numerade Educator

Problem 25

The pollutants released by jet aeroplanes in the atmosphere as fluorocarbons are called:
(a) photochemical oxidants
(b) photochemical reductants
(c) aerosols $\square$
(d) physical pollutants *

Narayan Hari

Numerade Educator

Problem 26

Pollution can be controlled by:
(a) sewage treatment
(b) manufacturing electrically operated vehicles
(c) adopting green chemistry
(d) all of the above

Narayan Hari

Numerade Educator

Problem 27

The chief pollutants which are responsible for ozone depletion:
(a) $\mathrm{SO}_{2}$
(b) $\mathrm{CO}_{2}$
(c) CO
(d) oxides of nitrogen and chlorofluorocarbons

Narayan Hari

Numerade Educator

Problem 28

$\mathrm{SO}_{2}$ and $\mathrm{NO}_{2}$ cause pollution by increasing:
(a) acidity
(b) alkalinity
(c) buffer action
(d) none of these

Narayan Hari

Numerade Educator

Problem 29

Taj Mahal is threatened due to effect of:
(a) chlorine
(b) sulphur dioxide
(c) oxygen
(d) hydrogen

Narayan Hari

Numerade Educator

Problem 30

Taj Mahal is threatened due to effect of:
(a) chlorine
$\square$ (b) sulphur dioxide
(c) oxygen
$\square$ (d) hydrogen

Narayan Hari

Numerade Educator

Problem 31

Most important cause of soil pollution is:
(a) iron junks
$\square$ (b) glass junks
(c) detergents
$\square$ (d) plastics

Narayan Hari

Numerade Educator

Problem 32

When huge amount of sewage is dumped in a river, the $\mathrm{BOD}$ will:
(a) increase
$\square$ (b) remain unchanged $\square$
(c) decrease
$\square$ (d) increase or decrease $\square$

Narayan Hari

Numerade Educator

Problem 33

Which of the following is the secondary pollutant?
(a) $\mathrm{CO}$ $\square$
(b) PAN
(c) $\mathrm{SO}_{2}$
$\square$ (d) Aerosol

Narayan Hari

Numerade Educator

Problem 34

If there was no carbon dioxide in earth's atmosphere, the temperature of the earth's surface would be:
(a) same as present
(b) less than the present
(c) more than the present
(d) dependent on the amount of oxygen in the atmosphere

Narayan Hari

Numerade Educator

Problem 35

Ozone hole refers to:
(a) increased concentration of ozone
(b) reduction in the thickness of ozone layer in troposphere
(c) reduction in the thickness of ozone layer in stratosphere
(d) hole in ozone layer

Narayan Hari

Numerade Educator

Problem 36

Measurement of the rate of $\mathrm{O}_{2}$ consumption in unit volume of water over a period of time is done to find out:
(a) biogas generation
(b) biological oxygen demand
(c) biosynthetic pathways .
(d) fermentation

Narayan Hari

Numerade Educator

Problem 37

One of the metals used as a catalyst in automobiles' catalytic converter is:
(a) palladium
$\square$ (b) copper
(c) radium
$\square$ (d) iron

Narayan Hari

Numerade Educator

Problem 38

Photochemical smog is related to the pollution of:
(a) soil
$\square$ (b) water
(c) noise
$\square$ (d) air

Narayan Hari

Numerade Educator

Problem 39

Lead is considered as:
(a) water pollutant $\square$
(b) soil pollutant
(c) air pollutant
$\square$ (d) radioactive pollutant

Narayan Hari

Numerade Educator

Problem 40

Gas released during Bhopal tragedy was:
(a) sodium isothiocyanate
(b) ethyl isothiocyanate
(c) potassium isothiocyanate
(d) methyl isothiocyanate

Narayan Hari

Numerade Educator

Problem 41

Pollutant is a chemical substance or factor which disturbs:
(a) our balanced environment
(b) geochemical cycles
(c) flora of any region
(d) fauna of any region

Narayan Hari

Numerade Educator

Problem 42

A brick kiln should not be allowed near an orchard:
(a) to save plants from soil erosion
(b) to save fruits from labourers
(c) to save plants from smoke and toxic gases emitted by kiln
(d) to save plants from transport vehicles

Narayan Hari

Numerade Educator

Problem 43

The basic component of smog is:
(a) PAN
(b) PBN
(c) $\mathrm{NO}_{2}$
(d) all of these

Narayan Hari

Numerade Educator

Problem 44

In Antarctica, ozone depletion is due to the formation of the following compounds:
(a) acrolin
(b) peroxyacetyl nitrate
(c) $\mathrm{SO}_{2}$ and $\mathrm{SO}_{3}$
(d) chlorine nitrate

Narayan Hari

Numerade Educator

Problem 45

An object is located at a height of $5 \mathrm{~km}$ from the surface of the earth. The object is located in which part of the atmosphere?
(a) Thermosphere
(b) Mesosphere $\left[\begin{array}{l}.\end{array}\right.$
(c) Stratosphere
(d) Troposphere

Narayan Hari

Numerade Educator

Problem 46

$\mathrm{CFCl}_{3}$ is responsible for the decomposition of ozone to form oxygen. Which of the following reacts with ozone to form oxygen?
(a) $\mathrm{Cl}_{2}$
$\square$ (b) $\mathrm{Cl}^{-}$
(c) $\mathrm{F}^{-}$
$\square$ (d) $\dot{C}]$

Narayan Hari

Numerade Educator

Problem 47

The photochemical smog can be suppressed by:
[P.E.T. (Kerala)
(a) nitrogen oxides $\square$
(b) hydrocarbons
(c) radical traps
$\square$ (d) formaldehyde
(e) peroxyacetyl nitrate

Narayan Hari

Numerade Educator

Problem 48

Which of the following is not an air pollutant? [E.A.M.C.E.T. (Med.) 2007]
(a) $\mathrm{CO}$
$\square$ (b) $\mathrm{SO}_{2}$
(c) NO
$\square$ (d) $\mathrm{N}_{2}$

Narayan Hari

Numerade Educator

Problem 49

Green chemistry means such reactions which:
(a) are related to the depletion of ozone layer D
(b) produce colour during reactions
(c) study the reactions in plants C
(d) reduce the use and production of hazardous chemicals

Narayan Hari

Numerade Educator

Problem 50

Identify the wrong statement in the following:
(a) acid rain is mostly because of oxides of nitrogen and sulphur $\Pi$
(b) chlorofluorocarbons are responsible for ozone layer depletion
(c) greenhouse effect is responsible for global warming
(d) ozone layer does not permit infrared radiation from the sun to reach the earth

Narayan Hari

Numerade Educator

Problem 51

In which part of atmosphere, ozone layer is present?
(a) Stratosphere
$\square$ (b) Troposphere
(c) Mesosphere
$\square$ (d) Thermosphere

Narayan Hari

Numerade Educator

Problem 52

Which of the following is secondary pollutant?
(a) $\mathrm{CO}_{2}$
$\square$ (b) $\mathrm{N}_{2} \mathrm{O}$
(c) PAN
$\square$ (d) $\mathrm{SO}_{2}$

Narayan Hari

Numerade Educator

Problem 53

Among the following compounds, which one is not responsible for depletion of ozone layer?
(a) $\mathrm{CH}_{4}$
$\square$ (b) $\mathrm{CFCl}_{3}$
(c) NO
$\square$ (d) $\mathrm{Cl}_{2}$

Narayan Hari

Numerade Educator

Problem 54

Which one of the following compounds helps in achieving equilibrium between $\mathrm{O}_{2}$ and $\mathrm{CO}_{2}$ in atmosphere?
(a) Chlorophyll
$\square$ (b) Vitamin-B $_{12}$
(c) Porphyrin
$\square$ (d) Acetyl salicylic acid $\square$

Narayan Hari

Numerade Educator

Problem 55

The secondary precursors of photochemical smog are :
(a) $\mathrm{SO}_{2}$ and $\mathrm{NO}_{2}$
(b) $\mathrm{SO}_{2}$ and hydrocarbons
(c) $\mathrm{NO}_{2}$ and hydrocarbons
(d) $\mathrm{O}_{3}$ and PAN

Narayan Hari

Numerade Educator

Problem 56

The gases which are responsible for photochemical smog are:
(a) oxides of nitrogen $\square$
(b) hydrocarbons $\Gamma$
(c) carbon monoxide $\square$
(d) inert gases

Narayan Hari

Numerade Educator

Problem 57

The gases which are responsible for acid rain:
(a) oxides of nitrogen $\square$
(b) oxides of sulphur
(c) hydrocarbons
$\square$ (d) carbon monoxide

Narayan Hari

Numerade Educator

Problem 58

The gases which are absorbers of IR-radiation:
(a) oxygen
$\square$ (b) nitrogen
(c) carbon dioxide
$\square$ (d) chlorofluorocarbons

Narayan Hari

Numerade Educator

Problem 59

Particulates are added to the atmosphere by:
(a) industrial processes $\square$
(b) combustion of fuels
(c) agriculture burning $\square$
(d) photosynthesis

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Numerade Educator

Problem 60

The following processes occur in the troposphere:
(a) photosynthesis $\square$
(b) combustion
(c) greenhouse effect $\square$
(d) acid rain

Narayan Hari

Numerade Educator

Problem 61

If the greenhouse effect or global warming remains unchecked, it alter:
(a) sea levels
(b) ozone layer
(c) rainfall
(d) temperature

Narayan Hari

Numerade Educator

Problem 62

The following reactions occur in the stratosphere:
(a) $\mathrm{O}_{2}+\mathrm{UV} \longrightarrow \mathrm{O}+\mathrm{O}$
(b) $\mathrm{O}_{2}+\mathrm{O} \longrightarrow \mathrm{O}_{3}$
(c) $\mathrm{Cl}+\mathrm{O}_{3} \longrightarrow \mathrm{ClO}+\mathrm{O}_{2}$
(d) $\mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{H}_{2} \mathrm{SO}_{4}$

Narayan Hari

Numerade Educator

Problem 63

Pollution can be controlled if:
(a) all automobiles must be fitted with exhaust system's catalytic converters $\square$
(b) use of fossil fuels must be minimised and nonconventional energy sources should be developed $\square$
(c) emphasis on green chemistry is given
(d) population is stabilised

Narayan Hari

Numerade Educator