a2zinterviews

29.	Which of the following type of iron is used in making horse shoes?
	A.  Cast iron
	B.  Wrought iron
	C.  Pig iron
	D.  Steel

Answer

Ans: B Wrought iron

30.	Acid rain is caused due to air-pollution by
	A.  Methane
	B.  Carbon dioxide
	C.  Carbon monoxide
	D.  Nitrous oxide and sulphur dioxide

Answer

Ans: D Nitrous oxide and sulphur dioxide

31.	Which one of the following elements is used in the manufacture of safety matches?
	A.  Phosphorus
	B.  Silicon
	C.  Graphite
	D.  Sodium

Answer

Ans: A Phosphorus

32.	The enzyme which converts glucose and fructose into alcohol is
	A.  Diastase
	B.  Zymase
	C.  Maltase
	D.  Invertase

Answer

Ans: B Zymase