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

Ultraviolet radiation from sun causes a reaction that produces

Question # 2

Which heavy metals do not have any safe limits

Question # 3

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

Question # 4

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

Question # 5

Air pollution is not caused by

Question # 6

Which is not the condition for the formation of smog

Question # 7

Classical smog occurs in palces of

Question # 8

Oceans cove ______ percent of the surface of the earth

Question # 9

Which one is not a pollutant normally?

Question # 10

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 11

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 12

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 # 13

In the atmosphere, CO2is about

Question # 14

Which is not the affect of polluted air on environment

Question # 15

BOD is

Question # 16

Which is not a method for solid waste management

Question # 17

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

Question # 18

SO2Makes ______ acid rains

Question # 19

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

Question # 20

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 21

Pick up the correct statement

Question # 22

Water pollution is mainly due to

Question # 23

Which one is the most toxic?

Question # 24

Chromium (VI) is highly toxic and can cause

Question # 25

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 26

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

Question # 27

Chief air pollutant which is likely to deplete ozone layer

Question # 28

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

Question # 29

A pollutant affects

Question # 30

As it passes into food chain, the concentration of DDT

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
2 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
3 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
4 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
5 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
6 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
7 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
8 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
9 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
10 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

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