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

Which of the following is not an air

Question # 2

Polycyolic aromatic hydrocarbons are taught to be

Question # 3

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

Question # 4

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

Question # 5

Ozone hole refers to

Question # 6

Which is not the condition for the formation of smog

Question # 7

Which gas is not a constituent of atmosphere

Question # 8

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

Question # 9

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

Question # 10

B.O.D is connected with

Question # 11

Ozone hole is maximum over

Question # 12

NO and NO2gases in atmosphere are represented by

Question # 13

Drained sewage has B.O.D

Question # 14

The region of earth capable of supporting life is

Question # 15

BOD is

Question # 16

Which is not the affect of polluted air on environment

Question # 17

Swage water is purified by

Question # 18

In incinerating the waste is burnt at

Question # 19

UV radiations bring about

Question # 20

Which causes water pollution?

Question # 21

Eutrophication causes reduction in

Question # 22

Acid rains are produced by

Question # 23

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

Question # 24

Soil remediation means

Question # 25

SO2Makes ______ acid rains

Question # 26

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 27

A single chlorine free radical can destroy how many ozone molecules

Question # 28

Which step is unnecessary for purification of water for drinking purposes

Question # 29

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 30

Chromium (VI) is highly toxic and can cause

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
2 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
3 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
4 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
5 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
6 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
7 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
8 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
9 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
10 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C

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