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

Ecology is a science of environment and deals specially with

Question # 2

NO and NO2gases in atmosphere are represented by

Question # 3

A single chlorine free radical can destroy how many ozone molecules

Question # 4

Water pollution is mainly due to

Question # 5

Increasing skin cancer and high mutation rate are due to

Question # 6

Which of the following is not an air

Question # 7

Burning of fossil fuels is the main source of pollution

Question # 8

Oceans cove ______ percent of the surface of the earth

Question # 9

Which is not a component of environment

Question # 10

The normal amount of overhead ozone is about

Question # 11

Swage water is purified by

Question # 12

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

Question # 13

The amount of Si in the lithosphere is about

Question # 14

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

Question # 15

B.O.D is connected with

Question # 16

Drawback DDT as presticide is

Question # 17

Chloroflurocarbon releases a chemical harmful to ozone

Question # 18

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

Question # 19

Acid rains are produced by

Question # 20

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

Question # 21

Chromium (VI) is highly toxic and can cause

Question # 22

Soil remediation means

Question # 23

Chief air pollutant which is likely to deplete ozone layer

Question # 24

Ozone hole is maximum over

Question # 25

In the atmosphere, CO2is about

Question # 26

Polycyolic aromatic hydrocarbons are taught to be

Question # 27

Water is often treated with chlorine to

Question # 28

Air pollution is not caused by

Question # 29

Spraying of DDT produces pollution of

Question # 30

Atmosphere of big/metropolitan cities is polluted most by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which is not a method for solid waste management
A. Landfill
B. Incinerating
C. Recycling
D. None of these
2 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
3 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
4 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
5 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
6 Soil remediation means
A. To make it suitable for cultivation of crops
B. To make it acidic
C. To make it alkeline
D. To add manure into it
7 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
8 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
9 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
10 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil

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