Properties of Air and Water NDA Questions

NDA Chemistry

Properties of Air and Water MCQ Questions


1.
Who discovered that carbon dioxide is present in air?
A.
Joseph Priestley
B.
Joseph Black
C.
Henry Cavendish
D.
Robert Hooke
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ANSWER :
B. Joseph Black
2.
A grown up tree intakes _______ of carbon dioxide exhaled by one person and it gives out the same amount of oxygen required by a person.
A.
Half
B.
Full
C.
One-third
D.
One-fourth
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ANSWER :
C. One-third
3.
Melting of snow caps and increase in sea levels are the consequences of _______
A.
Acid rain
B.
Smog
C.
Aerosol
D.
Global warming
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ANSWER :
D. Global warming
4.
When dust particles and smoke combine with fog in the presence of sunlight, _______ is formed.
A.
Acid rain
B.
Smog
C.
Aerosol
D.
Global warming
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ANSWER :
B. Smog
5.
Statement__________ Sulphur dioxide and nitrogen oxides react with water in the atmosphere producing Sulphuric acid and nitric acid. Question__________ These acids come down along with the rain. This is called ______
A.
Acid rain
B.
Smog
C.
Aerosol
D.
Global warming
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ANSWER :
A. Acid rain
6.
When liquid or solid particles are dispersed in air, it is called _______.
A.
Acid rain
B.
Smog
C.
Aerosol
D.
Global warming
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ANSWER :
C. Aerosol