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

Exposure to CO results in

Question # 2

Drained sewage has B.O.D

Question # 3

What is the cause of water pollution

Question # 4

Air pollution is not caused by

Question # 5

A single chlorine free radical can destroy how many ozone molecules

Question # 6

DDT is

Question # 7

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

Question # 8

As it passes into food chain, the concentration of DDT

Question # 9

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

Question # 10

Classical smog occurs in palces of

Question # 11

Which of the following human activities are contaminating surface and ground waters

Question # 12

Eutrophication causes reduction in

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

Soil salinity can be measured by

Question # 15

Which one is not a pollutant normally?

Question # 16

Fungicides are the pesticides which

Question # 17

The largest item which is recycled is

Question # 18

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 19

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

Question # 20

A pollutant affects

Question # 21

Spraying of DDT produces pollution of

Question # 22

In the atmosphere, CO2is about

Question # 23

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 24

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

Question # 25

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

Question # 26

Ecosystem is a smaller unit of

Question # 27

The % of CO2is the atmosphere is

Question # 28

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

Question # 29

Atmosphere of big/metropolitan cities is polluted most by

Question # 30

Most hazardous metal pollutant of automobile exhaust is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
2 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
3 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
4 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
5 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
6 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
7 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
8 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
9 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
10 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles

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