Question # 1

SO₂and NO₂cause pollution due to increase in

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Buffer action

Basicity

Acidity

Neutrality

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as:

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10 isomers

3 isomers

5 isomers

6 isomers

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds

The process of coagulation can remove suspended solids in raw water about

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50%

60%

Less than 40%

More than 80%

The toxic organic compounds and heavy metals and metalloids results in contamination of

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surface water

ground water

both surface and ground water

neither surface nor ground waters

Many petroleum products are:

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coloured

colourless

testy

poisoinous

Surface and ground water sources are contaminated by various human activities. Which of the following is not human activity that causes contamination in fresh water

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Live stock waste

Oil leaks and spills

Desposal of industrial effluents

Rain

Which is not the affect of polluted air on environment

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acid rain

smog

ozone

global warming

Which of the following waste material is not recycled for use again

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Glasses

Paper

Plastic toys

Hides of animals

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

Term ozone hole is used for depletion of ozone during months of:

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Jan-Feb

March - Sep

Sep- Nov

Dec-Feb

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

DDT is a:

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Fungicide

Insecticide

Herbicide

All

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

CFC's are known to cause depletion of ozone layer therefore their use has been banned in refrigerators and air conditioners. Which alternate compound may be suitable to replace CFC

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CCl₄

CHCl₃

CH₃- CH₂- CH₂- CH₃

CHCl₂- CHF₂

Natural water is

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Pure

Impure

Acts as solute

Distilled

Which is not an air pollutant

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N₂

CO

NO

N₂O

Lithosphere has amount of silicon

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35.30%

27.72%

40.01%

21.13%

Which one of the following is not air pollutant gas

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CO

CO₂

NO

SO₂

Chemical equilibrium involving reactants and products in more than one phase is called:

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Homogeneous

Heterogeneous

Dynamic

Static

Which of the following is not a secondary pollutant

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Ozone

Carbonic acid

Sulphuric acid

Carbon dioxide

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

Which of spectral lines when atoms are subjected to strong electric field is called:

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Compton effect

Stark effect

Zeeman effect

Photoelectric effect

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

46.60%

50.50%

Which one of the following is not a component of environment

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Biosphere

Stratosphere

Hydrosphere

Lithosphere

Residence time of methane in the atmosphere is

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3 - 7 days

2 -3 days

3 - 7 years

2 - 3 years

Photo chemical smog contains ______ as main reactants

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Nitrons oxide and unburnt hydrocarbons

Nilric oxide and unburnt hydrocarbons

No and burnt hydrocarbons

N₂O and burnt hydrocarbons

Ozone is a gas having boiling point

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Unstable

High

Low

Moderate

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

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Biochemistry

Physically chemistry

Pharmaceutical chemistry

Environmental chemistry

Ozone in stratosphere extends upto km:

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0-15 km

10-15 km

15-40 km

15-25 km

Which of the following human activities are contaminating surface and ground waters?

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pesticides

septic ranks

petroleum and natural gas production

all of these

The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal?

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Coal tar

CO₂

Coal gas

Coke

Ozone layer is high:

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20-23 km

22-25 km

23-26 km

25-28 km

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