ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

Try The MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

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ECAT Chemistry Chapter 27 Environmental Chemistry

00:00
Question # 1

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 2

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 3

In the atmosphere, O2is about

Question # 4

Chief air pollutant which is likely to deplete ozone layer

Question # 5

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 6

Mottling of teeth is due to presence of an element in drinking water

Question # 7

Which is not the affect of polluted air on environment

Question # 8

Ozone hole refers to

Question # 9

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 10

Result of ozone hole is

Question # 11

Carbon monoxide is pollutant as it

Question # 12

Which is not a component of environment

Question # 13

Which one is the most toxic?

Question # 14

Ultraviolet radiation from sun causes a reaction that produces

Question # 15

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 16

Which step is unnecessary for purification of water for drinking purposes

Question # 17

Increased asthmatic attacks in certain seasons are related to

Question # 18

Which one of the following is not air pollutant gas

Question # 19

UV radiations bring about

Question # 20

In Antarctica ozone depletion is due to the formation of following compound

Question # 21

Depletion of ozone layer is due to

Question # 22

Soil salinity can be measured by

Question # 23

Classical smog occurs in palces of

Question # 24

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 25

Acid rain is due to increase in atmospheric concentration of

Question # 26

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 27

SO2and NO2produce pollution by increasing

Question # 28

Ecology is a science of environment and deals specially with

Question # 29

Chromium (VI) is highly toxic and can cause

Question # 30

The largest item which is recycled is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
2 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
3 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
4 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
5 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
6 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
7 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
8 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
9 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
10 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically

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