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

B.O.D is connected with

Question # 2

SO2Makes ______ acid rains

Question # 3

Ozone hole is maximum over

Question # 4

In incinerating the waste is burnt at

Question # 5

Depletion of ozone layer is due to

Question # 6

Fungicides are the pesticides which

Question # 7

Which heavy metals do not have any safe limits

Question # 8

Ecosystem is a smaller unit of

Question # 9

BOD is

Question # 10

What is the cause of water pollution

Question # 11

Exposure to CO results in

Question # 12

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

Question # 13

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

Question # 14

Environmental pollution affects

Question # 15

Chief air pollutant which is likely to deplete ozone layer

Question # 16

Minamata disease is due to pollution of

Question # 17

Ozone depletion in stratosphere shall result in

Question # 18

Chromium (VI) is highly toxic and can cause

Question # 19

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

Question # 20

The amount of Si in the lithosphere is about

Question # 21

The amount of oxygen in the lithosphere is about

Question # 22

Which one is the most toxic?

Question # 23

Carbon monoxide is pollutant as it

Question # 24

Which step is unnecessary for purification of water for drinking purposes

Question # 25

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

Question # 26

A pollutant affects

Question # 27

Acid rain is due to increase in atmospheric concentration of

Question # 28

In purification of potable water the coagulant used is

Question # 29

Air pollution is not caused by

Question # 30

Ecology is a science of environment and deals specially with

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
2 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
3 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
4 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
5 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
6 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
7 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
8 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
9 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
10 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum

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