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

Increasing skin cancer and high mutation rate are due to

Question # 2

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

Question # 3

Environmental pollution affects

Question # 4

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 5

Chief source of water and soil pollution is

Question # 6

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

Question # 7

Burning of fossil fuels is the main source of pollution

Question # 8

Most hazardous metal pollutant of automobile exhaust is

Question # 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

Question # 10

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 11

Polycyolic aromatic hydrocarbons are taught to be

Question # 12

Ultraviolet radiation from sun causes a reaction that produces

Question # 13

Carbon monoxide is pollutant as it

Question # 14

Fungicides are the pesticides which

Question # 15

B.O.D is connected with

Question # 16

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

Question # 17

The amount of Si in the lithosphere is about

Question # 18

In the atmosphere, O2is about

Question # 19

Water which his considered to be safe for human consumption is known as

Question # 20

The film forming components of paints are

Question # 21

The largest item which is recycled is

Question # 22

Drawback DDT as presticide is

Question # 23

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

Question # 24

A single chlorine free radical can destroy how many ozone molecules

Question # 25

Biodegradable pollutant is

Question # 26

Pick up the correct statement

Question # 27

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

Question # 28

Water is often treated with chlorine to

Question # 29

NO and NO2gases in atmosphere are represented by

Question # 30

A pollutant affects

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
2 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
3 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
4 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
5 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
6 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
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 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
9 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
10 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters

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