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

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

Question # 2

In the atmosphere, O2is about

Question # 3

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 # 4

Carbon monoxide is harmful to human beings as it

Question # 5

The amount of oxygen in the lithosphere is about

Question # 6

In the atmosphere, CO2is about

Question # 7

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 8

Ecology is a science of environment and deals specially with

Question # 9

Photochemical smog is caused by

Question # 10

Pick up the correct statement

Question # 11

Increasing skin cancer and high mutation rate are due to

Question # 12

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 13

Classical smog occurs in palces of

Question # 14

Which is not the condition for the formation of smog

Question # 15

Biodegradable pollutant is

Question # 16

The film forming components of paints are

Question # 17

Drained sewage has B.O.D

Question # 18

A single chlorine free radical can destroy how many ozone molecules

Question # 19

Acid rain is due to increase in atmospheric concentration of

Question # 20

Environmental pollution affects

Question # 21

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

Question # 22

Which one is the most toxic?

Question # 23

Which is not a method for solid waste management

Question # 24

Acid rains are produced by

Question # 25

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

Question # 26

Burning of fossil fuels is the main source of pollution

Question # 27

As it passes into food chain, the concentration of DDT

Question # 28

Shahi Qilla may be destroyed by

Question # 29

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

Question # 30

Atomospheric pollutant is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
2 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
3 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
4 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
5 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
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 one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
8 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
9 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
10 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action

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