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17.	The pH of an acidic solution is
	A.  Zero
	B.  Neutral
	C.  Greater than 7
	D.  Less than 7

Answer

Ans: D Less than 7

18.	Pure water does not conduct electricity because it is
	A.  Almost not ionized
	B.  Low boiling
	C.  Neutral
	D.  Readily decomposed

Answer

Ans: A Almost not ionized

19.	In isotopes the number of neutrons are
	A.  Same
	B.  Different
	C.  Both
	D.  None of these

Answer

Ans: B Different

20.	The gas is commonly used in anaesthesia
	A.  Nitrogen
	B.  Nitrous oxide
	C.  Methane
	D.  Hydrogen peroxide

Answer

Ans: B Nitrous oxide