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

Shahi Qilla may be destroyed by

Question # 2

Chloroflurocarbon releases a chemical harmful to ozone

Question # 3

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

Question # 4

Carbon monoxide is pollutant as it

Question # 5

Phosphate pollution is caused by

Question # 6

Atomospheric pollutant is

Question # 7

Ecosystem is a smaller unit of

Question # 8

In purification of potable water the coagulant used is

Question # 9

Acid rain is due to increase in atmospheric concentration of

Question # 10

Water is often treated with chlorine to

Question # 11

Potable water is considered to be

Question # 12

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

Question # 13

The normal amount of overhead ozone is about

Question # 14

Ozone depletion in stratosphere shall result in

Question # 15

Classical smog occurs in palces of

Question # 16

Domestic waste mostly constitutes

Question # 17

Cyclone collector is used for minimizing

Question # 18

Burning of fossil fuels is the main source of pollution

Question # 19

Which factor is helping to reduce the environmental pollution

Question # 20

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 # 21

BOD is

Question # 22

Drained sewage has B.O.D

Question # 23

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

Question # 24

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

Question # 25

Swage water is purified by

Question # 26

Carbon monoxide is harmful to human beings as it

Question # 27

Fungicides are the pesticides which

Question # 28

UV radiations bring about

Question # 29

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 30

A pollutant affects

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
2 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
3 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
4 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
5 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
6 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
7 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
8 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
9 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
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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