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

Air pollution is not caused by

Question # 2

Drawback DDT as presticide is

Question # 3

The % of CO2is the atmosphere is

Question # 4

Which is not a component of environment

Question # 5

NO and NO2gases in atmosphere are represented by

Question # 6

In incinerating the waste is burnt at

Question # 7

Chloroflurocarbon releases a chemical harmful to ozone

Question # 8

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 9

Chromium (VI) is highly toxic and can cause

Question # 10

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

Question # 11

Ozone hole refers to

Question # 12

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

Question # 13

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

Question # 14

Ultraviolet radiation from sun causes a reaction that produces

Question # 15

Minamata disease is due to pollution of

Question # 16

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

Question # 17

Which one is the most toxic?

Question # 18

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

Question # 19

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

Question # 20

Soil salinity can be measured by

Question # 21

UV radiations bring about

Question # 22

The normal amount of overhead ozone is about

Question # 23

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 24

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 25

Soil remediation means

Question # 26

B.O.D is connected with

Question # 27

Burning of fossil fuels is the main source of pollution

Question # 28

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

Question # 29

Most hazardous metal pollutant of automobile exhaust is

Question # 30

Which step is unnecessary for purification of water for drinking purposes

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
2 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
3 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
4 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
5 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
6 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
7 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
8 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
9 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
10 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
A. Iodine
B. Bromine
C. Lead
D. Carbon

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