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

Minamata disease is due to pollution of

Question # 2

Pick up the correct statement

Question # 3

In Antarctica ozone depletion is due to the formation of following compound

Question # 4

Most hazardous metal pollutant of automobile exhaust is

Question # 5

Atomospheric pollutant is

Question # 6

A pollutant affects

Question # 7

Domestic waste mostly constitutes

Question # 8

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 # 9

What is the cause of water pollution

Question # 10

Chief source of water and soil pollution is

Question # 11

Potable water is considered to be

Question # 12

Increased asthmatic attacks in certain seasons are related to

Question # 13

Which one of the following is not air pollutant gas

Question # 14

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

Question # 15

Which of the following waste material is not recycled for use again

Question # 16

Which heavy metals do not have any safe limits

Question # 17

Ozone hole refers to

Question # 18

Shahi Qilla may be destroyed by

Question # 19

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 # 20

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 21

Acid rains are produced by

Question # 22

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

Question # 23

Polycyolic aromatic hydrocarbons are taught to be

Question # 24

Ecosystem is a smaller unit of

Question # 25

A single chlorine free radical can destroy how many ozone molecules

Question # 26

The amount of Si in the lithosphere is about

Question # 27

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

Question # 28

Result of ozone hole is

Question # 29

The amount of oxygen in the lithosphere is about

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 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
2 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
3 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
4 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
5 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
6 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
7 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
8 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
9 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
10 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer

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