46. If rubbing vinegar on the stung area of the skin gives relief, then the person has been stung by:
(a)Ant (b) Cockroach (c)Bee (d) Wasp
Answer: (d)
47. The largest diamond:
47. The largest diamond:
(a) Kohinoor (b) Cullinan
(c) Hope (d) Star
Answer: (b)
48. Which among the following qualities of iron is best based upon iron content?
(a)Magnatite (b) Haematite (c)Limonite (d) Siderite
Answer: (a)
49. Spoilage of potato chips is prevented by packing them in plastic bags in an
atmosphere of:
(a)Oxygen (b) Nitrogen (c) Argon (d) Chlorine
Answer: (b)
50. Which among the following metal is used in railroad flares?
(a)Germanium (b) Cadmium (c) Strontium (d) Tin
Answer: (c)
51. The process by which tea leaves are separated from prepared tea is called:
(a)Distillation (b) Filtration (c) Evaporation (d) Solvent extraction
Answer: (b)
52.......... All alloy of -------- with any other metal is known as Amalgum.
52.......... All alloy of -------- with any other metal is known as Amalgum.
(a) Mercury (b) Iron
(c) Copper (d) Silver
Answer: (a)
53. Which one of the
following is used as moderator in nuclear reactor?
(a) Coal (b) Paraffin
(c) Lead (d) Graphite
Answer: (d)
54. Chlorine was
discovered by:
(a) Joseph Priestly
(b) Paul
Muller
(c) Joseph Black (d) Carl Scheele
Answer: (d)
55. Who categorised
elements according to atomic number?
(a) Mosley (b) Napier
(c)
Mendeleev (d) Priestly
Answer: (a)
56. Beryllium Aluminium
Silicate is known as:
(a) Emerald (b)
Topaz
(c) Diamond (d) Quartz
Answer: (a)
57. Methanoicacid istheanother name of:
(a) Lactic acid (b) Malic acid
(c) Formic acid (d) Prussic acid
Answer: (c)
58. The first organic compound
prepared in laboratory:
(a) Ammonia (b) Urea
(c) Methane (d) Benzene
Answer: (b)
59. The isotope used for the
treatment of Cancer:
(a) Carbon-14 (b) Uranium-238
(c) Cobalt-60 (d) None of these
Answer: (c)
60. Kovar is an alloy of Iron and---------
(a) Lead (b)
Copper
(c) Tin (d) Cobalt
Answer: (d)
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