81. In electric motor, electrical energy changes into which form of energy.
(A) Sound energy
(B) Heat energy
(C) Mechanical energy
(D) None of these
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82. The value of gravity is minimum at
(A) Poles
(B) Equator
(C) Tropics
(D) None of these
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83. The Earth rotates on its axis from
(A) North to South
(B) South to North
(C) West to East
(D) East to West
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84. With rise in temperature, viscosity of liquids
(A) decreases
(B) increases
(C) remains constant
(D) first increases then decreases
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85. Which of the following is not an electromagnetic wave ?
(A) α- rays
(B) β-rays
(C) Cathode rays
(D) All of these
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86. Which is used to see distant objects?
(A) Microscope
(B) Telescope
(C) Periscope
(D) None of these
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87. Which lens is used for correcting hypermetropia ?
(A) Convex lens
(B) Concave lens
(C) bifocal lens
(D) None of these
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88. Rubber is a
(A) Conductor
(B) Semiconductor
(C) Insulator
(D) None of these
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89. Which process is used in atom bomb ?
(A) Nuclear fusion.
(B) Nuclear fission
(C) Chemical reaction
(D) None of these
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90. Which acid is present in human stomach ?
(A) Hydrochloric acid
(B) Acetic acid
(C) Tartaric acid
(D) Oxalic acid
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91. Which is used to prepare the voter’s ink?
(A) Silver Iodide
(B) Silver Nitrate
(C) Hydrogen Peroxide
(D) Ferric Oxide
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92. Which is called a strategic metal ?
(A) Copper
(B) Aluminium
(C) Lead
(D) Tin
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93. Which is a renewable natural resource ?
(A) Sunlight
(B) Coal
(C) Petroleum
(D) Natural gas
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94. Main constituent of Gobar gas is
(A) Methane
(B) Ethane
(C) Propane
(D) Butane
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95. What is rusting?
(A) Galvanization with Zinc
(B) Corrosion of Iron
(C) Corrosion of Nickel
(D) None of these
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96. Density of water is maximum at
(A) 0 °C
(B) -4 °C
(C) 4 °C
(D) None of these
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97. Deficiency of protein causes
(A) Scurvy
(B) Pellagra
(C) Night-blindness .
(D) Kwashiorkor
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98. Pernicious anaemia is caused by the deficiency of which vitamin ?
(A) Vitamin C
(B) Vitamin D
(C) Vitamin K
(D) Vitamin B12
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99. The world’s most poisonous snake is
(A) Python
(B) Bull Snake
(C) Milk Snake
(D) Sea Snake
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100. Which is the largest gland of human body ?
(A) Liver
(B) Pancreas
(C) Pituitary gland
(D) Thyroid gland
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Great work sir