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

Which one is the major reason for pollution in high cities?

Question # 2

Pick up the correct statement

Question # 3

Domestic waste mostly constitutes

Question # 4

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 5

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 6

Burning of fossil fuels is the main source of pollution

Question # 7

Which one is not a pollutant normally?

Question # 8

Atmosphere of big/metropolitan cities is polluted most by

Question # 9

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

Question # 10

Drained sewage has B.O.D

Question # 11

Which heavy metals do not have any safe limits

Question # 12

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 13

Phosphate pollution is caused by

Question # 14

Environmental pollution affects

Question # 15

Drawback DDT as presticide is

Question # 16

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

Question # 17

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

Question # 18

DDT is

Question # 19

The amount of oxygen in the lithosphere is about

Question # 20

UV radiations bring about

Question # 21

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 22

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 # 23

Shahi Qilla may be destroyed by

Question # 24

Chromium (VI) is highly toxic and can cause

Question # 25

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

Question # 26

Soil salinity can be measured by

Question # 27

Carbon monoxide is pollutant as it

Question # 28

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

Question # 29

Fungicides are the pesticides which

Question # 30

The region of earth capable of supporting life is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
2 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
3 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
4 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
5 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
6 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
7 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
8 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
9 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
10 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2

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