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

Photochemical smog is caused by

Question # 2

In purification of potable water the coagulant used is

Question # 3

Which of the following human activities are contaminating surface and ground waters

Question # 4

UV radiations bring about

Question # 5

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

Question # 6

BOD is

Question # 7

Potable water is considered to be

Question # 8

The region of earth capable of supporting life is

Question # 9

Water pollution is mainly due to

Question # 10

Chief air pollutant which is likely to deplete ozone layer

Question # 11

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 12

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

Question # 13

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 # 14

The normal amount of overhead ozone is about

Question # 15

Which is not a method for solid waste management

Question # 16

The amount of oxygen in the lithosphere is about

Question # 17

Pollution is

Question # 18

Ozone depletion in stratosphere shall result in

Question # 19

Which one is the major reason for pollution in high cities?

Question # 20

A single chlorine free radical can destroy how many ozone molecules

Question # 21

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 # 22

As it passes into food chain, the concentration of DDT

Question # 23

Which is not a component of environment

Question # 24

Ecosystem is a smaller unit of

Question # 25

Which step is unnecessary for purification of water for drinking purposes

Question # 26

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

Question # 27

Which of the following is not an air

Question # 28

Atmosphere of big/metropolitan cities is polluted most by

Question # 29

NO and NO2gases in atmosphere are represented by

Question # 30

Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
2 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
3 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
4 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
5 Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
6 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
7 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
8 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
9 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
10 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above

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