SSC CGL CHEMISTRY Question Answer Part - 2 (Q. No. 62-122)
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62. There are only two metals that are non-silver in color, they are
(a) Sodium & Magnesium
(b) Copper & Gold **
(c) Palladium & Platinum
(d) Nickel & Zinc
63. The process of sudden cooling is known as –
(a) annealing
(b) diffusion
(c) quenching **
(d) sedimentation
64. The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomicclocks is.
(a) Califonrium
(b) Calcium
(c) Cerium
(d) Cesium **
65. Heavy metal got their name because compared to other atoms they have
(a) Higher atomic number
(b) Higher atomic radii
(c) Higher atomic masses **
(d) Higher densities
66. The ore of Aluminium is
(a) Chalco pyrites
(b) Hematite
(c) Fluorspar
(d) Bauxite **
67. Chemically vermillion is
(a) Calcium Carbonate
(b) Potassium Nitrate
(c) Potassium Sulphide
(d) Merucry (II) Sulphide **
(e) None of the above
68. Annealing process is –
(a) heating the steel bright red and then cooling slowly **
(b) heating the steel to a temperature much below redness and cooling it slowly
(c) beating rods of iron embedded in charcoal powder
(d) heating steel to bright red and cooling suddenly
69. Sodium metal should be stored in
(a) Alcohol
(b) Kerosene oil **
(c) Water
(d) Hydrochloric acid
70. Which of the most reactive metal?
(a) Sodium
(b) Calcium
(c) Iron
(d) Potassium **
71. Which one among the following is used in making gunpowder?
(a) Magnesium sulphate
(b) Potassium nitrate **
(c) Sodium stearate
(d) Calcium sulphate
72. In the ordinary fire extinguisher, carbon dioxide is generated by the reaction of
(a) Sodium carbonate and dilute HCI
(b) Sodium bicarbonate and dilute H2SO4 **
(c) Limestone and dilute H2SO4
(d) Marble powder and dilute HCI
73. The chemical name of plaster of paris is-
(a) Calcium Chloride
(b) Calcium Nitrate
(c) Calcium Sulphate Hydrate **
(d) None of these
74. Water attains maximum density at-
(a) 0° C
(b) 4° F
(c) 4 k
(d) 4° C **
75. Which of the following could act as properllant for rockets-
(a) Liquid hydrogen + Liquid nitrogen
(b) Liquid nitrogern – Liquid oxygen
(c) Liquid hydrogen - Liquid oxygen **
(d) Liquid oxygen – Liquid argon
76. The velocity of neutrons in nuclear reactor is slowed down by-
(a) Heavy water (D2O) **
(b) Zinc rod
(c) Fused caustic soda
(d) Ordinary water (H2O)
77. Which of the following gases is used in cigarette lighters?
(a) Butane **
(b) Methane
(c) Propane
(d) Radon
78. The chemical used as a fixer /developer in photography
(a) Sodium sulphate
(b) Sodium sulphide
(c) Sodium thiosulphate **
(d) Sodium sulphite
79. Marsh gas contains-
(a) CO2
(b) CH4 **
(c) N2
(d) C2H6
80. The ultraviolet rays can be checked by –
(a) Flint glass
(b) Crooke’s glass **
(c) Soda glass
(d) Pyrex glass
81. Permanent hardness of water is due to the presence of
(a) Sulphates of sodium and potassium
(b) Sulphates of magnesium and calcium **
(c) Carbonates of sodium and magnesium
(d) Bicarbonates of magnesium and calcium
82. Red phosphorus is less reactive than yellow phosphorus because-
(a) It is red in colour
(b) it is highly polymerized **
(c) It is insoluble in C2H5OH
(d) it is hard
83. In the manufacture of safety matches, we use-
(a) White phosphorus
(b) Black phosphoorus
(c) Violet phosphorus
(d) Red phosphorus **
84. Photographic plates are coated with a film of-
(a) AgCI
(b) AgBr **
(c) AgI
(d) AgNO3
85. Cid rain is due to
(a) Sulphur dioxide pollution **
(b) Carbon monoxide pollution
(c) Pesticide pollution
(d) Dust particules in the atmosphere
86. The gas used to extinguish fire is –
(a) Neon
(b) Nitrogen
(c) Carbon dioxide **
(d) Carbon monoxide
87. Which of the following is responsible for blue baby syndrome-
(a) Fluoride
(b) Nitrate **
(c) Arsenic
(d) Lead
88. The pollutan responsible for ozone holes is …………
(a) CO2
(b) SO2
(c) CO
(d) CFC **
89. In the study of pollution, SPM refers to
(a) Sulphur Phosphorus Matter
(b) Sulphur Particlulate Matter
(c) Solid Particulate Matter
(d) Suspended Particulate Matter **
90. The first organic compound synthesized in the laboratory was
(a) Urea **
(b) Uric acid
(c) Lactic acid
(d) Glucose
91. Gas used for artificial ripening of fruits is:
(a) Ethane
(b) Acetylene **
(c) Propane
(d) Methane
92. Chromatography technique is used for the separation of
(a) Small sample of mixture
(b) Plant pigments
(c) Dye stuff
(d) All **
93. The gas produced in marshy places due to decomposition of vegetation is
(a) Carbon monoxide
(b) Carbon dioxide
(c) Sulphur dioxide
(d) Methane **
94. Ethanol containing 5% water is known as-
(a) Absolute alcohol
(b) Dilute alcohol
(c) Power alcohol
(d) Rectified spirit **
95. Chemical name of Gammaxane is:
(a) Aniline
(b) Toulene
(c) Benzene hexachloride **
(d) Chloro benzene
96. Power alcohol is –
(a) Absolute alcohol + Methyle alcohol
(b) Absoluted alcohol + Petrol **
(c) Rectified alcohol + Petrol
(d) Denatured alcohol + Petrol
97. What happens when a drop of glycerol is added to crush KMnO4 sprcad on a paper?
(a) There is a crackling sound
(b) There is no reaction
(c) The paper ignites **
(d) There is a violent explosion
98. Main pollutan present in automobile exhaust is-
(a) CO **
(b) CO2
(c) NO
(d) hydrocarbons
99. Which of the following is used as raw material for the manufacture of rayon?
(a) Coal
(b) Petroleum
(c) Cellulose **
(d) Plastic
100. Lemon is sour due to-
(a) Citric acid **
(b) Tartaric acid
(c) Oxalic acid
(d) Acetic acid
101. Which one omong the following fules is used in gas welding?
(a) LPG
(b) Ethylene **
(c) Methane
(d) Acetylene
102. Fementation of ethyl alcohol into acetic acid is done by-
(a) Zymase
(b) Diastase
(c) Maltase
(d) Bacterium mycoderma aceti **
103. The process by which vegetable ghee is manufactured is known as-
(a) Saponification
(b) Hydrogenation **
(c) Esterification
(d) Dydrolysis
104. The sweetest of all sugars-
(a) Glucose only
(b) glucose and galactose
(c) glucose and fructose
(d) glucose and lactose **
105. Enzymses are –
(a) carbohydrates
(b) lipids
(c) proteins **
(d) None of these
106. One of the best solutions to get rid of non – biodegradable wastes is
(a) Recycling **
(b) Dumping
(c) Burying
(d) Burning
107. Vitamin C is –
(a) ascorbic acid **
(b) nicotinic acid
(c) citric acid
(d) tartaric acid
108. Chemical name of vitamin A is –
(a) Thiamine
(b) axerophthol (acid) **
(c) Ascorbic acid
(d) nicotinamide
109. Which one of the following contains cobalt?
(a) Chlorophyll
(b) Haemoglobin
(c) Vitamin C
(d) Vitamin B12 **
110. Vitamin B1 is known as-
(a) pyridoxine
(b) thiamine **
(c) tocopheral
(d) riboflavin
111. Enzymes-
(a) accelerate bio-chemical reactions
(b) consist of amino acids
(c) have optimum activity at body temperature
(d) have all these properties **
112. Which is fight and flight organ?
(a) Adrenal
(b) Thyroid **
(c) Pituitary
(d) Kidney
113. Which one among the following substances is NOT a ‘green house’ gas?
(a) Water vapour
(b) Chlorofluorocarbon
(c) Methane
(d) Nitrogen **
114. Vitamin B12 contains-
(a) Co **
(b) O2
(c) CO2
(d) Cl2
115. Deficiency of which one of the following cause xerophthalmia-
(a) Vitamin B3
(b) Vitamin B12
(c) Vitamin A **
(d) Vitamin C
116. Deficiency of which one of the following cause knock knee, bow legs and pigeon chest in children
(a) Vitamin A
(b) Vitamin B2
(c) Vitamin D **
(d) Vitamin E
117. The term ‘Carbon foot print’ means
(a) A region which is rich in coal mines
(b) The amount of reduction in the emission of CO2 by a country
(c) The use of Carbon in manufacturing industries
(d) The amount of greenhouse gases produced by our day-to-day activities **
118. Ozone depletion in the stratosphere is mainly caused by-
(a) SO2
(b) NO2
(c) NO
(d) Chlorofluorocarbons **
119. Global warming may result in-
(a) Flood
(b) cyclone
(c) Decrease in forest productivity
(d) all of the above **
120. TAj Mahal is said to be suffering from “Marble Cancer”. What is Marble Cancer?
(a) Smokes filling the Taj Mahal from adjoining industries
(b) Large no. of funges is Taj Mahal marbles.
(c) Acidic rain which corrodes marble **
(d) Yellowing of marble on a/c.. of soot particles
121. The substrate of Photorespiration is.
(a) Fuctose
(b) Pyruvic acid
(c) Glycolate
(d) Glucose **
122. Acid rain is caused by the pollution of environment by-
(a) carbon dioxide and nitrogen
(b) carbon monoxide and carbon dioxide
(c) ozone and carbon dioxide
(d) Nitrous oxide and sulphur dioxide **
SSC CGL CHEMISTRY Question Answer Part - 1