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

DDT is

Question # 2

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

Question # 3

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

Question # 4

In the atmosphere, CO2is about

Question # 5

Swage water is purified by

Question # 6

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

Question # 7

Ecology is a science of environment and deals specially with

Question # 8

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

Question # 9

Fungicides are the pesticides which

Question # 10

Chromium (VI) is highly toxic and can cause

Question # 11

Ozone hole refers to

Question # 12

Water pollution is mainly due to

Question # 13

What is the cause of water pollution

Question # 14

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

Question # 15

BOD is

Question # 16

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

Question # 17

Which gas is not a constituent of atmosphere

Question # 18

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

Question # 19

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 20

Acid rain is due to increase in atmospheric concentration of

Question # 21

Pollution is

Question # 22

Which causes water pollution?

Question # 23

Soil salinity can be measured by

Question # 24

Chloroflurocarbon releases a chemical harmful to ozone

Question # 25

The % of CO2is the atmosphere is

Question # 26

Photochemical smog is caused by

Question # 27

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 28

Which of the following waste material is not recycled for use again

Question # 29

Depletion of ozone layer is due to

Question # 30

Ultraviolet radiation from sun causes a reaction that produces

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
2 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
3 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
4 Soil remediation means
A. To make it suitable for cultivation of crops
B. To make it acidic
C. To make it alkeline
D. To add manure into it
5 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
6 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
7 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
8 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
9 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
10 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only

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