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

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

Question # 2

Which one is not a pollutant normally?

Question # 3

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

Question # 4

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

Question # 5

UV radiations bring about

Question # 6

Oceans cove ______ percent of the surface of the earth

Question # 7

Cyclone collector is used for minimizing

Question # 8

Which of the following is not an air

Question # 9

Minamata disease is due to pollution of

Question # 10

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

Question # 11

Biodegradable pollutant is

Question # 12

Ultraviolet radiation from sun causes a reaction that produces

Question # 13

Drawback DDT as presticide is

Question # 14

Photochemical smog is caused by

Question # 15

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

Question # 16

Most hazardous metal pollutant of automobile exhaust is

Question # 17

Acid rains are produced by

Question # 18

Chief source of water and soil pollution is

Question # 19

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

Question # 20

Water is often treated with chlorine to

Question # 21

Which one is the most toxic?

Question # 22

In purification of potable water the coagulant used is

Question # 23

Water which his considered to be safe for human consumption is known as

Question # 24

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 25

A single chlorine free radical can destroy how many ozone molecules

Question # 26

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

Question # 27

In the atmosphere, CO2is about

Question # 28

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

Question # 29

Chloroflurocarbon releases a chemical harmful to ozone

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
2 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
3 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
4 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
5 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
6 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
7 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
8 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
9 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
10 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper

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