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

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Question # 1

Water is often treated with chlorine to

Question # 2

The amount of oxygen in the lithosphere is about

Question # 3

Chromium (VI) is highly toxic and can cause

Question # 4

Fungicides are the pesticides which

Question # 5

Which gas is not a constituent of atmosphere

Question # 6

The % of CO2is the atmosphere is

Question # 7

The normal amount of overhead ozone is about

Question # 8

Drained sewage has B.O.D

Question # 9

Biodegradable pollutant is

Question # 10

Which is not a method for solid waste management

Question # 11

Environmental pollution affects

Question # 12

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 13

Atmosphere of big/metropolitan cities is polluted most by

Question # 14

Photochemical smog is caused by

Question # 15

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 16

Polycyolic aromatic hydrocarbons are taught to be

Question # 17

Chloroflurocarbon releases a chemical harmful to ozone

Question # 18

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

Question # 19

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

Question # 20

SO2and NO2produce pollution by increasing

Question # 21

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 # 22

Potable water is considered to be

Question # 23

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 24

Domestic waste mostly constitutes

Question # 25

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

Question # 26

Pollution is

Question # 27

Ecosystem is a smaller unit of

Question # 28

In the atmosphere, O2is about

Question # 29

Which step is unnecessary for purification of water for drinking purposes

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
2 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
3 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
4 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
5 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
6 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
7 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
8 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
9 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
10 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants

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