300 Science MCQ Questions in english

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300 Science MCQ Questions in english हिन्दी

Read science multiple choice questions for the various types of competitive exams. These science questions will help students to prepare for their exams. Improve your Science subject knowledge by reading these science questions.

76. A fathom is a measure of

A. Frequency

B. Distance

C. Depth

D. Sound

75. An amalgam is:

A. Alloys which contain mercury as one of the contents

B. Highly coloured alloys

C. Alloys which contain carbon

D. Alloys which have great resistance to abrasion

74. Which of the following metals has the lowest density?

A. Lead

B. Silver

C. Lithium

D. Mercury

73. Which of the following metals can you normally find in liquid form?

A. Mercury

B. Uranium

C. Radium

D. Zinc

72. Water purification using potassium permanganate is utilised because

A. It dissolves the impurities of water.

B. It is an oxidising agent.

C. It is a sterilising agent

D. It is a reducing agent

71. That which follows is an element

A. Emerald

B. Diamond

C. Sapphire

D. Ruby

70. What metal causes air pollution in large cities?

A. Lead

B. Cadmium

C. Copper

D. Chromium

69. An alloy known as bell metal is

A. Brass and Nickel

B. Nickel and Copper

C. Tin and Copper

D. Zinc and Copper

68. Ionic salts may be effectively dissolved in water because:

A. It has a high boiling point

B. It has a high specific heat

C. It has no colour

D. It has a high dipole moment

67. Which one of the following is not a hydrogen isotope?

A. Yttrium

B. Protium

C. Tritium

D. Deuterium

66. Pearls' primary ingredients include

A. Aragonite and Conchiolin

B. Calcium Oxide and Ammonium Chloride

C. Calcium Carbonate and Magnesium Carbonate

D. Ammonium Sulphate and Sodium Carbonate

65. LPG mostly consists of:

A. Methane, Butane and Propane

B. Methane, Ethane and Hexane

C. Ethane, Hexane and Nonane

D. Methane, Hexane and Nonane

64. Air is an or a

A. Element

B. Electrolyte

C. Mixture

D. Compound

63. Which of the following home items uses the production of CFC gas, which is intended to be outlawed in India?

A. Tube light

B. Television

C. Cooking gas

D. Refrigerator

62. The contents of balloons include

A. Oxygen

B. Nitrogen

C. Helium

D. Argon

61. Of the following, which one does not include a coinage metal?

A. Zinc and Gold

B. Copper and Silver

C. Copper and Gold

D. Silver and Gold

60. Which of the following is one of a vascular plant's key structural axes?

A. Leaves

B. Stem

C. Flower

D. Thallus

59. An allotrope of diamond is:

A. Sulphur

B. Silicon

C. Carbon

D. Germanium

58. When fireworks are lit, the green flame results from

A. Mercury

B. Potassium

C. Barium

D. Sodium

57. Water's enduring hardness can be eliminated by adding:

A. Bleaching Powder

B. Potassium Permanganate

C. Chlorine

D. Washing Soda

56. A Marsh gas

A. Ethane

B. Hydrogen

C. Methane

D. Nitrogen

55. Which of the following describes gun metal's constituent parts?

A. Copper, Tin and Zinc

B. Iron, Zinc and Titanium

C. Iron, Brass and Tin

D. Iron and Tin

54. What material is used to make radium?a) Limestone

A. Limestone

B. Rutile

C. Haematite

D. Pitchblende

53. Describe laughing gas

A. Sulphur dioxide

B. Hydrogen peroxide

C. Nitrous Oxide

D. Carbon monoxide

52. The elements with atomic numbers starting with actinides are

A. 101 to 115

B. 89 to 103

C. 36 from 43

D. 97 to 104

51. The following two substances are typically used to create transistors:

A. Silicon and Germanium

B. Iridium and Tungsten

C. Niobium and Columbium

D. Boron and Aluminium

50. The most significant aluminium ore is

A. Calcite

B. Galena

C. Bauxite

D. Calamine

49. What is most soluble in water?

A. Sugar

B. Camphor

C. Sulphur

D. Common salt

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