Environmental Chemistry UPSC Questions

Chemistry

Environmental Chemistry MCQ Questions


13.
Which of the following present in the stratosphere prevents 99.5 per cent of the sun’s harmful Ultraviolet radiations from reaching the earth’s surface?
A.
Oxygen
B.
Exosphere
C.
Hydrogen
D.
Ozone
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ANSWER :
D. Ozone
14.
How much harmful UV radiation of ozone in the stratosphere reaches the Earth's surface?
A.
95%
B.
99.50%
C.
83%
D.
26%
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ANSWER :
B. 99.50%
15.
Tropospheric pollution occurs due to the presence of undesirable ____________ particles in the air.
A.
Solid or Gaseous
B.
Solid or Liquid
C.
Nitrogen or Hydrogen
D.
Physical or Chemical
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ANSWER :
A. Solid or Gaseous
16.
How many Gaseous are there in air pollutants ?
A.
Ten
B.
Five
C.
Six
D.
Twelve
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ANSWER :
C. Six
17.

What are the examples of Particulate pollutants:
(i)Dust
(ii)Mist
(iii)Ozone
(iv)Smoke
(v)Smog

A.

Options ii,iii,iv,v

B.

Options i,ii,iv,v

C.

Options ii,iv,v

D.

All of the Above

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ANSWER :
B.

Options i,ii,iv,v

18.
Oxides of sulphur are produced when sulphur-containing _____________ is burnt.
A.
Fossil Fuel
B.
Oil
C.
Gas
D.
Petrol
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ANSWER :
A. Fossil Fuel