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

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Question # 1

UV radiations bring about

Question # 2

The pH range of the acid rain is

Question # 3

NO and NO2gases in atmosphere are represented by

Question # 4

Atmosphere of big/metropolitan cities is polluted most by

Question # 5

Soil salinity can be measured by

Question # 6

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

Question # 7

The largest item which is recycled is

Question # 8

Ultraviolet radiation from sun causes a reaction that produces

Question # 9

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

Question # 10

Water which his considered to be safe for human consumption is known as

Question # 11

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 # 12

Drawback DDT as presticide is

Question # 13

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 14

Which factor is helping to reduce the environmental pollution

Question # 15

SO2and NO2produce pollution by increasing

Question # 16

Chief air pollutant which is likely to deplete ozone layer

Question # 17

Ecology is a science of environment and deals specially with

Question # 18

Result of ozone hole is

Question # 19

Environmental pollution affects

Question # 20

The % of CO2is the atmosphere is

Question # 21

Which one of the following is not air pollutant gas

Question # 22

SO2Makes ______ acid rains

Question # 23

Swage water is purified by

Question # 24

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 25

In incinerating the waste is burnt at

Question # 26

Air pollution is not caused by

Question # 27

Chief source of water and soil pollution is

Question # 28

Increased asthmatic attacks in certain seasons are related to

Question # 29

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

Question # 30

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
2 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
3 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
4 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
5 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
6 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
7 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
8 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
9 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
10 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

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