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

UV radiations bring about

Question # 2

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 3

Ecology is a science of environment and deals specially with

Question # 4

Which gasses are produced from landfills

Question # 5

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

Question # 6

Increased asthmatic attacks in certain seasons are related to

Question # 7

Most hazardous metal pollutant of automobile exhaust is

Question # 8

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

Question # 9

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

Question # 10

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 11

Which gas is not a constituent of atmosphere

Question # 12

Acid rain is due to increase in atmospheric concentration of

Question # 13

The film forming components of paints are

Question # 14

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

Question # 15

Domestic waste mostly constitutes

Question # 16

A pollutant affects

Question # 17

Acid rains are produced by

Question # 18

Result of ozone hole is

Question # 19

Atomospheric pollutant is

Question # 20

Ultraviolet radiation from sun causes a reaction that produces

Question # 21

Swage water is purified by

Question # 22

Drawback DDT as presticide is

Question # 23

Pick up the correct statement

Question # 24

Minamata disease is due to pollution of

Question # 25

The amount of oxygen in the lithosphere is about

Question # 26

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

Question # 27

Burning of fossil fuels is the main source of pollution

Question # 28

Which factor is helping to reduce the environmental pollution

Question # 29

Mottling of teeth is due to presence of an element in drinking water

Question # 30

Fungicides are the pesticides which

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
2 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
3 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
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 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
6 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
7 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
8 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
9 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
10 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

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