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

Swage water is purified by

Question # 2

In purification of potable water the coagulant used is

Question # 3

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

Question # 4

A pollutant affects

Question # 5

Biodegradable pollutant is

Question # 6

Which one of the following is not air pollutant gas

Question # 7

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 8

Which of the following is not an air

Question # 9

BOD is

Question # 10

When chlorofluoro carbon are subjected to U.V. they form

Question # 11

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 # 12

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

Question # 13

Air pollution is not caused by

Question # 14

Drawback DDT as presticide is

Question # 15

Sulphur dioxide affects

Question # 16

Photochemical smog is caused by

Question # 17

Ozone hole is maximum over

Question # 18

Chloroflurocarbon releases a chemical harmful to ozone

Question # 19

Ultraviolet radiation from sun causes a reaction that produces

Question # 20

Which is not the condition for the formation of smog

Question # 21

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 22

The amount of Si in the lithosphere is about

Question # 23

The % of CO2is the atmosphere is

Question # 24

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

Question # 25

Pick up the correct statement

Question # 26

Pollution is

Question # 27

Which causes water pollution?

Question # 28

Which gas is not a constituent of atmosphere

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
2 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
3 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
4 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
5 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
6 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
7 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
8 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
9 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
10 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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