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

Photochemical smog is caused by

Question # 2

Depletion of ozone layer is due to

Question # 3

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 4

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

Question # 5

Fungicides are the pesticides which

Question # 6

Which heavy metals do not have any safe limits

Question # 7

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

Question # 8

The % of CO2is the atmosphere is

Question # 9

A single chlorine free radical can destroy how many ozone molecules

Question # 10

Increased asthmatic attacks in certain seasons are related to

Question # 11

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

Question # 12

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

Question # 13

What is the cause of water pollution

Question # 14

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

Question # 15

Acid rains are produced by

Question # 16

Acid rain is due to increase in atmospheric concentration of

Question # 17

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 18

NO and NO2gases in atmosphere are represented by

Question # 19

Biodegradable pollutant is

Question # 20

Which causes water pollution?

Question # 21

Ozone depletion in stratosphere shall result in

Question # 22

Which one is the most toxic?

Question # 23

Which one is not a pollutant normally?

Question # 24

Increasing skin cancer and high mutation rate are due to

Question # 25

Chief source of water and soil pollution is

Question # 26

Atomospheric pollutant is

Question # 27

BOD is

Question # 28

Ozone hole is maximum over

Question # 29

Shahi Qilla may be destroyed by

Question # 30

In purification of potable water the coagulant used is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
2 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
3 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
4 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
5 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
6 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
7 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
8 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
9 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers
10 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2

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