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

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

Question # 2

Ecosystem is a smaller unit of

Question # 3

The largest item which is recycled is

Question # 4

Ultraviolet radiation from sun causes a reaction that produces

Question # 5

Ozone hole is maximum over

Question # 6

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 # 7

Environmental pollution affects

Question # 8

Most hazardous metal pollutant of automobile exhaust is

Question # 9

Burning of fossil fuels is the main source of pollution

Question # 10

Which one of the following is not air pollutant gas

Question # 11

Chromium (VI) is highly toxic and can cause

Question # 12

NO and NO2gases in atmosphere are represented by

Question # 13

Spraying of DDT produces pollution of

Question # 14

Acid rain is due to increase in atmospheric concentration of

Question # 15

Ecology is a science of environment and deals specially with

Question # 16

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 # 17

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

Question # 18

Chief source of water and soil pollution is

Question # 19

DDT is

Question # 20

Which heavy metals do not have any safe limits

Question # 21

Increased asthmatic attacks in certain seasons are related to

Question # 22

Drawback DDT as presticide is

Question # 23

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 24

Oceans cove ______ percent of the surface of the earth

Question # 25

The % of CO2is the atmosphere is

Question # 26

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

Question # 27

Pollution is

Question # 28

Chromium (VI) is highly toxic and can cause

Question # 29

In incinerating the waste is burnt at

Question # 30

Classical smog occurs in palces of

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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 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
3 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
4 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
5 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
6 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
7 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
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 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
10 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin

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