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5.	Which of the following is not a water pollutant?
	A.  Copper
	B.  Nickel
	C.  Zinc
	D.  Sulphur dioxide

Answer

Ans: A Copper

6.	Which of the following is not a greenhouse gas?
	A.  Nitrogen
	B.  Nitrous oxide
	C.  Methane
	D.  Carbon dioxide

Answer

Ans: A Nitrogen

7.	The maximum biodiversity is found in
	A.  arctic forests
	B.  tropical rain forests
	C.  temperate forests
	D.  coniferous forests

Answer

Ans: B tropical rain forests

8.	The greenhouse effect is mostly caused by
	A.  Moisture in the atmosphere
	B.  Ozone layer
	C.  Carbon dioxide in the atmosphere
	D.  Infra red radiation

Answer

Ans: C Carbon dioxide in the atmosphere