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

Pollution is

Question # 2

Fungicides are the pesticides which

Question # 3

Which one of the following is not air pollutant gas

Question # 4

The amount of oxygen in the lithosphere is about

Question # 5

Increasing skin cancer and high mutation rate are due to

Question # 6

Acid rain is due to increase in atmospheric concentration of

Question # 7

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 8

Chromium (VI) is highly toxic and can cause

Question # 9

Classical smog occurs in palces of

Question # 10

Which causes water pollution?

Question # 11

SO2Makes ______ acid rains

Question # 12

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 13

In purification of potable water the coagulant used is

Question # 14

Which factor is helping to reduce the environmental pollution

Question # 15

Drained sewage has B.O.D

Question # 16

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

Question # 17

Which is not the condition for the formation of smog

Question # 18

Water pollution is mainly due to

Question # 19

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

Question # 20

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

Question # 21

Which step is unnecessary for purification of water for drinking purposes

Question # 22

Water is often treated with chlorine to

Question # 23

Increased asthmatic attacks in certain seasons are related to

Question # 24

Acid rains are produced by

Question # 25

Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water

Question # 26

A pollutant affects

Question # 27

NO and NO2gases in atmosphere are represented by

Question # 28

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

Question # 29

Chloroflurocarbon releases a chemical harmful to ozone

Question # 30

DDT is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
2 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
3 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
4 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
5 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
6 Which is not a method for solid waste management
A. Landfill
B. Incinerating
C. Recycling
D. None of these
7 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
8 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
9 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
10 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU

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