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

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 # 2

Which is not the affect of polluted air on environment

Question # 3

Shahi Qilla may be destroyed by

Question # 4

Which is not a component of environment

Question # 5

The pH range of the acid rain is

Question # 6

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 # 7

In the atmosphere, CO2is about

Question # 8

A pollutant affects

Question # 9

Acid rains are produced by

Question # 10

DDT is

Question # 11

Increasing skin cancer and high mutation rate are due to

Question # 12

Which of the following is not an air

Question # 13

Ozone hole refers to

Question # 14

Minamata disease is due to pollution of

Question # 15

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

Question # 16

Oceans cove ______ percent of the surface of the earth

Question # 17

Which one is not a pollutant normally?

Question # 18

Water is often treated with chlorine to

Question # 19

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

Question # 20

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

Question # 21

A single chlorine free radical can destroy how many ozone molecules

Question # 22

Carbon monoxide is harmful to human beings as it

Question # 23

Chief source of water and soil pollution is

Question # 24

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

Question # 25

Eutrophication causes reduction in

Question # 26

Ecosystem is a smaller unit of

Question # 27

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

Question # 28

Pollution is

Question # 29

Ozone depletion in stratosphere shall result in

Question # 30

Chromium (VI) is highly toxic and can cause

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
2 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
3 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
4 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
5 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
6 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
7 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
8 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
9 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
10 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin

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