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 hole refers to

Question # 2

Which is not a component of environment

Question # 3

SO2Makes ______ acid rains

Question # 4

BOD is

Question # 5

Ecology is a science of environment and deals specially with

Question # 6

In the atmosphere, CO2is about

Question # 7

Pick up the correct statement

Question # 8

In purification of potable water the coagulant used is

Question # 9

Which heavy metals do not have any safe limits

Question # 10

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

Question # 11

Depletion of ozone layer is due to

Question # 12

Polycyolic aromatic hydrocarbons are taught to be

Question # 13

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 14

NO and NO2gases in atmosphere are represented by

Question # 15

Atmosphere of big/metropolitan cities is polluted most by

Question # 16

The region of earth capable of supporting life is

Question # 17

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 18

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

Question # 19

Which gas is not a constituent of atmosphere

Question # 20

Drawback DDT as presticide is

Question # 21

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 22

Increasing skin cancer and high mutation rate are due to

Question # 23

Result of ozone hole is

Question # 24

Sulphur dioxide affects

Question # 25

Increased asthmatic attacks in certain seasons are related to

Question # 26

Potable water is considered to be

Question # 27

Cyclone collector is used for minimizing

Question # 28

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

Question # 29

A pollutant affects

Question # 30

Shahi Qilla may be destroyed by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
2 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
3 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
4 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
5 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
6 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
7 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
8 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
9 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
10 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2

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