(a) animal charcoal
(b)sugar charcoal
(c) coconut charcoal
(d) wood charcoal
12 Q) The most abundant metal in the earth’s crust is
(a) zinc
(b) copper
(c) aluminium
(d) iron
(a) Television
(b) Tubelight
(c) Cooking gas
(d) Refrigerator
14 Q) The gas used to extinguish fire, is
(a) neon
(b) nitrogen
(c) carbon dioxide
(d) carbon monoxide
15 Q) In which of the following activities silicon carbide is used ?
(a)Making cement and glass
(b)Disinfecting water of ponds
(c)Making casts for statues
(d)Cutting very hard substances
16 Q) The element common to all acids is
(a)carbon
(b) hydrogen
(c) oxygen
(d) sulphur
17 Q) Gobar gas contains mainly
(a)methane
(b)carbon dioxide
(c) butane
(d)carbon monoxide
18 Q) The most malleable metal is
(a)Silver
(b)Gold
(c) Aluminium
(d)Sodium
19 Q) Tetraethyl lead is used as
(a) mosquito repellent
(b)painkiller
(c) fire extinguisher
(d)petrol additive
20 Q) Which of the following is used in beauty parlours for hair setting?
(a) Chlorine
(b)Sulphur
(c) Phosphorus
(d)Silicon
Advertisements
No comments:
Post a Comment