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

The largest item which is recycled is

Question # 2

BOD is

Question # 3

Domestic waste mostly constitutes

Question # 4

Which gas is not a constituent of atmosphere

Question # 5

Eutrophication causes reduction in

Question # 6

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 7

Which gasses are produced from landfills

Question # 8

Ecology is a science of environment and deals specially with

Question # 9

Depletion of ozone layer is due to

Question # 10

Which one is not a pollutant normally?

Question # 11

As it passes into food chain, the concentration of DDT

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

The film forming components of paints are

Question # 14

Which causes water pollution?

Question # 15

SO2Makes ______ acid rains

Question # 16

Most hazardous metal pollutant of automobile exhaust is

Question # 17

Which of the following is not an air

Question # 18

Increasing skin cancer and high mutation rate are due to

Question # 19

Environmental pollution affects

Question # 20

Pick up the correct statement

Question # 21

B.O.D is connected with

Question # 22

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

Question # 23

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 24

Phosphate pollution is caused by

Question # 25

Photochemical smog is caused by

Question # 26

Ultraviolet radiation from sun causes a reaction that produces

Question # 27

UV radiations bring about

Question # 28

Ozone depletion in stratosphere shall result in

Question # 29

Chromium (VI) is highly toxic and can cause

Question # 30

A single chlorine free radical can destroy how many ozone molecules

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
2 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
3 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
4 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
5 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
6 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
7 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
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 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
10 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these

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