495 MCQ Questions in english

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495 MCQ Questions in english हिन्दी

75. Cooking utensils that are nonstick are coated with

A. Teflon

B. Black paint

C. Polystyrene

D. PVC

74. Silicon carbide is used in which of the following activities?

A. Disinfecting water of ponds

B. Cutting very hard substances

C. Making cement and glass

D. Making casts for statues

73. What is the approximate salinity of seawater?

A. 2.5%

B. 3%

C. 3.5%

D. 2%

72. Iron oxide is created when an iron nail rusts.

A. With decrease in the weight of the nail

B. Without any change in the weight of the nail

C. Without any change in colour or weight of the nail

D. With increase in the weight of the nail

71. The coating on galvanized iron sheets is

A. Chromium

B. Zinc

C. Tin

D. Lead

70. Among the different carbon allotropes

A. Diamond is the hardest, graphite is the softest

B. Diamond is the hardest, lamp black is the softest

C. Coke is the hardest, graphite is the softest

D. Diamond is the hardest, coke is the softest

69. Where does a computer's data get added and compared?

A. CPU

B. Memory

C. Hard disk

D. Floppy disk

68. Which of the following work as lubricant?

A. Iron Oxide

B. Diamond

C. Silica

D. Graphite

67. Lead tetraethyl is used as

A. Mosquito Repellent

B. Fire Extinguisher

C. Pain Killer

D. Petrol Additive

66. The inert gas that deep sea divers use to breathe in place of the nitrogen in the air is

A. Helium

B. Argon

C. Xenon

D. Krypton

65. The gases utilised in various forms of welding consist;

A. Oxygen, Hydrogen, Acetylene and Nitrogen

B. Oxygen and Acetylene

C. Oxygen, Acetylene and Argon

D. Oxygen and Hydrogen

64. When a material is exposed to air, it has the ability to absorb moisture from

A. Efflorescence

B. Desiccation

C. Deliquescence

D. Osmosis

63. Typically employed in quartz clocks and other devices, quartz crystals are chemically

A. A mixture of Germanium Oxide and Silicon dioxide

B. Sodium Silicate

C. Germanium Oxide

D. Silicon Dioxide

62. Which gas is not referred to as a greenhouse gas?

A. Nitrous oxide

B. Methane

C. Hydrogen

D. Carbon dioxide

61. A kilobyte is equivalent to...?

A. 1000 bytes

B. 100 bytes

C. 1024 bytes

D. 1023 bytes

60. What is bromine?

A. Red Liquid

B. Colourless Gas

C. Highly Inflammable Gas

D. Black Solid

59. The material that is the toughest on earth is

A. Iron

B. Gold

C. Platinum

D. Diamond

58. The type of coal where the deposit may be seen to include remnants of the original plant matter is

A. Lignite

B. Bitumen

C. Peat

D. Anthracite

57. Prothrombin, a substance that aids in blood clotting, is released by

A. lymphocytes

B. monocytes

C. blood platelets

D. erythrocytes

56. How many buses are connected to the microprocessor 8085?

A. 2

B. 3

C. 5

D. 8

55. An assembler is?

A. Programming language-dependent

B. Syntax dependant

C. Machine dependant

D. Data dependant

54. What ingredient(s) is(are) utilised in pencils?

A. Charcoal

B. Silicon

C. Phosphorous

D. Graphite

53. Which of the following metals combines with other metals to produce an amalgam?

A. Mercury

B. Tin

C. Zinc

D. Lead

52. Water's chemical formula is

A. NaA1O2

B. Al2O3

C. CaSiO3

D. H2O

51. Typically, the gas in an electric bulb is

A. Hydrogen

B. Carbon dioxide

C. Nitrogen

D. Oxygen

50. The generic term for washing soda is

A. Calcium Bicarbonate

B. Sodium Carbonate

C. Calcium Carbonate

D. Sodium Bicarbonate

49. The filament used in electric light bulbs is made up of

A. Copper

B. Aluminium

C. Lead

D. Tungsten

48. The name of the tree that roots from its branches into the ground is:

A. Oak

B. Pine

C. Banyan

D. Palm

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