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

Ultraviolet radiation from sun causes a reaction that produces

Question # 2

Ozone hole is maximum over

Question # 3

Classical smog occurs in palces of

Question # 4

Ecosystem is a smaller unit of

Question # 5

In the atmosphere, O2is about

Question # 6

Chief source of water and soil pollution is

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 11

Which is not the affect of polluted air on environment

Question # 12

Atmosphere of big/metropolitan cities is polluted most by

Question # 13

Polycyolic aromatic hydrocarbons are taught to be

Question # 14

Which one is the most toxic?

Question # 15

Carbon monoxide is pollutant as it

Question # 16

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 17

Minamata disease is due to pollution of

Question # 18

Chromium (VI) is highly toxic and can cause

Question # 19

Water is often treated with chlorine to

Question # 20

Swage water is purified by

Question # 21

A single chlorine free radical can destroy how many ozone molecules

Question # 22

Which is not a component of environment

Question # 23

NO and NO2gases in atmosphere are represented by

Question # 24

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

Question # 25

Pollution is

Question # 26

Biodegradable pollutant is

Question # 27

Which of the following is not an air

Question # 28

DDT is

Question # 29

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

Question # 30

The % of CO2is the atmosphere is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
2 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
3 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
4 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
5 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
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 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
8 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
9 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
10 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides

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