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

The largest item which is recycled is

Question # 2

Burning of fossil fuels is the main source of pollution

Question # 3

Increasing skin cancer and high mutation rate are due to

Question # 4

In Antarctica ozone depletion is due to the formation of following compound

Question # 5

A single chlorine free radical can destroy how many ozone molecules

Question # 6

Which one of the following is not air pollutant gas

Question # 7

Photochemical smog is caused by

Question # 8

Atmosphere of big/metropolitan cities is polluted most by

Question # 9

Polycyolic aromatic hydrocarbons are taught to be

Question # 10

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

Question # 11

Result of ozone hole is

Question # 12

Depletion of ozone layer is due to

Question # 13

Which is not the condition for the formation of smog

Question # 14

B.O.D is connected with

Question # 15

Carbon monoxide is pollutant as it

Question # 16

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

Question # 17

Domestic waste mostly constitutes

Question # 18

Which factor is helping to reduce the environmental pollution

Question # 19

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 20

Which causes water pollution?

Question # 21

Which of the following is not an air

Question # 22

Chief source of water and soil pollution is

Question # 23

Which is not the affect of polluted air on environment

Question # 24

Pollution is

Question # 25

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

Question # 26

Water pollution is mainly due to

Question # 27

BOD is

Question # 28

Chloroflurocarbon releases a chemical harmful to ozone

Question # 29

Soil salinity can be measured by

Question # 30

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
2 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
3 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
4 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
5 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
6 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
7 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
8 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
9 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
10 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%

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