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

Which factor is helping to reduce the environmental pollution

Question # 2

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

Question # 3

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

Question # 4

The region of earth capable of supporting life is

Question # 5

Photochemical smog is caused by

Question # 6

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 # 7

SO2Makes ______ acid rains

Question # 8

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 9

Which of the following is not an air

Question # 10

In purification of potable water the coagulant used is

Question # 11

Pick up the correct statement

Question # 12

Which is not the affect of polluted air on environment

Question # 13

Water is often treated with chlorine to

Question # 14

The amount of Si in the lithosphere is about

Question # 15

Domestic waste mostly constitutes

Question # 16

In incinerating the waste is burnt at

Question # 17

The pH range of the acid rain is

Question # 18

Spraying of DDT produces pollution of

Question # 19

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

Question # 20

Result of ozone hole is

Question # 21

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 22

Acid rain is due to increase in atmospheric concentration of

Question # 23

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

Question # 24

In the atmosphere, O2is about

Question # 25

A single chlorine free radical can destroy how many ozone molecules

Question # 26

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

Question # 27

Drained sewage has B.O.D

Question # 28

NO and NO2gases in atmosphere are represented by

Question # 29

When chlorofluoro carbon are subjected to U.V. they form

Question # 30

Chief source of water and soil pollution is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
2 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
3 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
4 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
5 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
6 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
7 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
8 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
9 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
10 Which is not a method for solid waste management
A. Landfill
B. Incinerating
C. Recycling
D. None of these

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