a2zinterviews

31.	Armature of Dynamo is made with
	A.  Iron material
	B.  Ferro magnetic material
	C.  Porcelain material
	D.  Cu–material

32.	Insects form the largest class of animals living on land and sea.
	A.  22 orders
	B.  26 orders
	C.  29 orders
	D.  32 orders

33.	Of the metals which, one pollutes the air of a big city?
	A.  Copper
	B.  Lead
	C.  Cadmium
	D.  Chromium

34.	Which of the following is not an isotope of hydrogen?
	A.  Tritium
	B.  Yttrium
	C.  Protium
	D.  Deuterium

35.	Which of the following metals remains in liquid form under normal conditions?
	A.  Mercury
	B.  Radium
	C.  Uranium
	D.  Zinc