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

Water is often treated with chlorine to

Question # 2

In purification of potable water the coagulant used is

Question # 3

Which heavy metals do not have any safe limits

Question # 4

The normal amount of overhead ozone is about

Question # 5

Atomospheric pollutant is

Question # 6

Drained sewage has B.O.D

Question # 7

Increased asthmatic attacks in certain seasons are related to

Question # 8

What is the cause of water pollution

Question # 9

Cyclone collector is used for minimizing

Question # 10

UV radiations bring about

Question # 11

Which step is unnecessary for purification of water for drinking purposes

Question # 12

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

Question # 13

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

Question # 14

Shahi Qilla may be destroyed by

Question # 15

DDT is

Question # 16

The amount of oxygen in the lithosphere is about

Question # 17

Photochemical smog is caused by

Question # 18

Ozone depletion in stratosphere shall result in

Question # 19

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 20

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 21

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

Question # 22

Pick up the correct statement

Question # 23

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

Question # 24

Which one is not a pollutant normally?

Question # 25

Classical smog occurs in palces of

Question # 26

Pollution is

Question # 27

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

Question # 28

Which is not the condition for the formation of smog

Question # 29

Depletion of ozone layer is due to

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
2 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
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 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
6 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
7 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
8 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
9 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
10 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles

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