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5.	Which of the following gases is not known as green house effect?
	A.  Methane
	B.  Nitrous oxide
	C.  Chlorofluorocarbons
	D.  Carbon dioxide

Answer

Ans: B Nitrous oxide

6.	Which of the following has the smallest egg?
	A.  Pigeon
	B.  Ostrich
	C.  Humming bird
	D.  Homo sapiens

Answer

Ans: D Homo sapiens

7.	Diamond is an allotropic form of
	A.  Sulphur
	B.  Silicon
	C.  Germanium
	D.  Carbon

Answer

Ans: D Carbon

8.	The element common to all acids is
	A.  Oxygen
	B.  Carbon
	C.  Sulphur
	D.  Hydrogen

Answer

Ans: D Hydrogen