The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
A. Catalytic conversion
B. Green house effect
C. Global warming
D. Both B and C
Answer: Option D
A. Catalytic conversion
B. Green house effect
C. Global warming
D. Both B and C
Answer: Option D
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.
A. Mercury
B. Lead
C. Fluoride
D. Arsenic
Smog is not formed due to the presence of __________ in the atmosphere.
A. SO2
B. NOx
C. CO2
D. Any of these
Dose of chlorine for disinfection of water is about __________ mg/litre of water.
A. 0.01
B. 0.1
C. 0.3
D. 1
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