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33.	Which one of the following is responsible for blue baby syndrome?
	A.  Arsenic
	B.  Nitrate
	C.  Lead
	D.  Fluoride

Answer

Ans: B Nitrate

34.	In chemical terms, what are alums used for purifying water for drinking purposes?
	A.  Double sulphates
	B.  Double nitrate
	C.  Hydrated chlorides
	D.  Nitrates of aluminium

Answer

Ans: A Double sulphates

35.	Which of the following chemicals is used in foam fire extinguishers?
	A.  Copper sulphate
	B.  Nickel sulphate
	C.  Aluminum sulphate
	D.  Cobalt sulphate

Answer

Ans: C Aluminum sulphate

36.	Carborundum is a compound of
	A.  S
	B.  Si
	C.  Ge
	D.  Ca

Answer

Ans: B Si