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 step is unnecessary for purification of water for drinking purposes

Question # 2

Which one of the following is not air pollutant gas

Question # 3

Carbon monoxide is pollutant as it

Question # 4

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

Question # 5

SO2and NO2produce pollution by increasing

Question # 6

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 7

Which one is the most toxic?

Question # 8

Domestic waste mostly constitutes

Question # 9

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 10

Acid rain is due to increase in atmospheric concentration of

Question # 11

Burning of fossil fuels is the main source of pollution

Question # 12

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

Question # 13

Ecology is a science of environment and deals specially with

Question # 14

Minamata disease is due to pollution of

Question # 15

Classical smog occurs in palces of

Question # 16

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

Question # 17

Most hazardous metal pollutant of automobile exhaust is

Question # 18

Which gas is not a constituent of atmosphere

Question # 19

Swage water is purified by

Question # 20

Pick up the correct statement

Question # 21

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

Question # 22

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

Question # 23

Atmosphere of big/metropolitan cities is polluted most by

Question # 24

Increased asthmatic attacks in certain seasons are related to

Question # 25

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

Question # 26

DDT is

Question # 27

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

Question # 28

Which heavy metals do not have any safe limits

Question # 29

The amount of oxygen in the lithosphere is about

Question # 30

Ecosystem is a smaller unit of

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
2 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
3 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
4 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
5 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
6 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
7 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
8 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
9 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
10 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment

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