Tuesday, 29 December 2015

General Science Chemistry-4

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:
(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.
(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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