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

Increasing skin cancer and high mutation rate are due to

Question # 2

Biodegradable pollutant is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Photochemical smog is caused by

Question # 7

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

Question # 8

Which one is the most toxic?

Question # 9

Polycyolic aromatic hydrocarbons are taught to be

Question # 10

The % of CO2is the atmosphere is

Question # 11

Chloroflurocarbon releases a chemical harmful to ozone

Question # 12

The film forming components of paints are

Question # 13

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 # 14

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

Question # 15

Sulphur dioxide affects

Question # 16

The amount of Si in the lithosphere is about

Question # 17

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

Question # 18

Which is not a method for solid waste management

Question # 19

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

Question # 20

In the atmosphere, O2is about

Question # 21

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

Question # 22

Spraying of DDT produces pollution of

Question # 23

Environmental pollution affects

Question # 24

Exposure to CO results in

Question # 25

BOD is

Question # 26

Ozone hole refers to

Question # 27

Water is often treated with chlorine to

Question # 28

Ozone hole is maximum over

Question # 29

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

Question # 30

Ozone depletion in stratosphere shall result in

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
2 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
3 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
4 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
5 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
6 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
7 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
8 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
9 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
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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