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

Acid rain is due to increase in atmospheric concentration of

Question # 2

Which causes water pollution?

Question # 3

Chloroflurocarbon releases a chemical harmful to ozone

Question # 4

Ecosystem is a smaller unit of

Question # 5

UV radiations bring about

Question # 6

Which is not a method for solid waste management

Question # 7

Which factor is helping to reduce the environmental pollution

Question # 8

Atmosphere of big/metropolitan cities is polluted most by

Question # 9

Domestic waste mostly constitutes

Question # 10

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 11

Polycyolic aromatic hydrocarbons are taught to be

Question # 12

Which is not the affect of polluted air on environment

Question # 13

Most hazardous metal pollutant of automobile exhaust is

Question # 14

In the atmosphere, CO2is about

Question # 15

In the atmosphere, O2is about

Question # 16

Which one is the major reason for pollution in high cities?

Question # 17

Which of the following is not an air

Question # 18

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

Question # 19

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

Question # 20

Burning of fossil fuels is the main source of pollution

Question # 21

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 # 22

Biodegradable pollutant is

Question # 23

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

Question # 24

Pollution is

Question # 25

Which one of the following is not air pollutant gas

Question # 26

Which heavy metals do not have any safe limits

Question # 27

A pollutant affects

Question # 28

Sulphur dioxide affects

Question # 29

Which step is unnecessary for purification of water for drinking purposes

Question # 30

Drained sewage has B.O.D

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
2 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
3 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
4 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
5 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
6 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
7 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
8 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
9 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
10 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere

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