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

Question # 2

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

Question # 3

UV radiations bring about

Question # 4

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

Question # 5

SO2and NO2produce pollution by increasing

Question # 6

Increased asthmatic attacks in certain seasons are related to

Question # 7

Chloroflurocarbon releases a chemical harmful to ozone

Question # 8

Exposure to CO results in

Question # 9

Water pollution is mainly due to

Question # 10

Shahi Qilla may be destroyed by

Question # 11

Soil remediation means

Question # 12

Atmosphere of big/metropolitan cities is polluted most by

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

A pollutant affects

Question # 15

Potable water is considered to be

Question # 16

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

Question # 17

What is the cause of water pollution

Question # 18

Which is not the condition for the formation of smog

Question # 19

The normal amount of overhead ozone is about

Question # 20

Phosphate pollution is caused by

Question # 21

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

Question # 22

As it passes into food chain, the concentration of DDT

Question # 23

Increasing skin cancer and high mutation rate are due to

Question # 24

Which is not the affect of polluted air on environment

Question # 25

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

Question # 26

Biodegradable pollutant is

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
2 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
3 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
4 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
5 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
6 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
7 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
8 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
9 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
10 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

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