HEMISTRY
1.The gas formed when Potassium permanganate is heated:
(a) Nitrogen (b) Oxygen
(c) Hydrogen (d) Ammonia
Answer: ( b)
2. The pungent smell emitted while scratching the match box:
(a) Oxygen (b) Hydrogen sulphide
(c) Methane (d) Sulphur dioxide
Answer: ( d)
3. The gas formed in Sun as the result of nuclear fusion:
(a) Oxygen (b) Hydrogen
(c) Methane (d) Helium
Answer: (d )
4. What is the colour of ozone:
(a) Yellow (b) Orange
(c) Blue (d) Red
Answer: (c )
5. Which metal is called ‘White Gold’?
(a) Mercury (b) Silver
(c) Iron Sulphide (d) Platinum
Answer: (d )
6. Which metal has the symbol ‘Hg’?
(a) Hydrogen (b) Iron
(c) Aluminium (d) Mercury
Answer: ( d)
7. The metal used to make the nib of fountain pens:
(a) Silver (b) Aluminium
(c) Lead (d) Iridium
Answer: (d )
8. The name ‘Aurum’ is related to the metal:
(a) Tungsten (b) Osmium
(c) Gold (d) Iridium
Answer: ( c)
9. The substances added to ore to remove impurities is called:
(a) Gang (b) Flux
(c) Aqua regia (d) Alloy
Answer: ( b)
10. Which is known as ‘the metal of hope’?
(a) Titanium (b) Uranium
(c) Silver (d) Platinum
Answer: (b )
11. Which one of the following can be used to absorb neutrons to control the chain reaction during nuclear fission?
(a) Boron (b) Heavy water
(c) Uranium (d) Plutonium
Answer: (a )
12. The colour of pure diamond:
(a) Red (b) Blue (c) Green (d) Colourless
Answer: ( d)
13. When water itself combines chemically with some element or mineral is called:
(a) Carbonation (b) Desilication
(c) Hydration (d) Oxidation
Answer: (c )
14. Who formulated the system of pH value?
(a) Lavosier (b) Pasteur
(c) Dalton (d) Sorenson
Answer: (d )
15. Bronze is an alloy of Copper and ......
(a) Tin (b) Zinc (c) Lead (d) Nickel
Answer: (a )
16. Chocolate contains Lead and.......
(a) Aluminium (b) Silver
(c) Cobalt (d) Nickel
Answer: (d )
17. Bauxite is the ore of:
(a) Barium (b) Iron
(c) Aluminium (d) Copper
Answer: (c )
18. Vanaspathi is prepared by passing .......through vegitable oil:
(a) Helium (b) Nitrogen
(c) Hydrogen (d) Carbon
Answer: (c )
19. Endosulfan is a :
(a) Insecticide (b) Hallucinogen
(c) Medicine (d) Beverage
Answer: (a)
20. The chemical name of Common Salt?
(a) Sodium Chloride (b) Calcium Chloride
(c) Potassium Chloride (d) Ferrous Sulphate
Answer: (a )
21. The first Trans Uranic element:
(a) Plutonium (b) Neptunium
(c) Einsteinium (d) Fermium
Answer: ( b)
22. Most chemically reactive element?
(a) Hydrogen (b) Oxygen
(c) Carbon (d) Flourine
Answer: ( d)
23. Heavy water is used in:
(a) Nuclear reactors (b) Aqua lungs
(c) Quartz clocks (d) Jet engines
Answer: ( a)
24. Sodium imparts ..... colour to flames:
(a) Red (b) Green (c) Yellow (d) Blue
Answer: ( c)
25. If the pH value of a substance is below 7 , it is:
(a) Acid (b) Base
(c) Neutral (d) Water
Answer: (a )
26. The process used in dairies to separate cream from milk is:
(a)Centrifugation (b) Sedimentation
(c) Filtration (d) Sublimation
Answer: (a)
27. Which of the following is not present in pure sugar?
(a)Carbon (b) Hydrogen (c) Oxygen (d) Nitrogen
Answer: (d)
28. Phosphorus finds important use in _____ industry.
(a)Soap (b) Fertilizer (c) Paper
(d) Sugar
Answer: (b)
29. Radio Carbon dating was discovered by:
(a)Willard Franck Libby (b) Madam Curie
(c) Henri Bequerel (d) Pierrie Curie
Answer: (a)
30. Development of unpleasant smell and taste in oil and fat containing food items due to oxidation of atmospheric oxygen is called:
(a)Radio activity (b) Turbidity (c) Acidity (d) Rancidity
Answer: (d)
31. The element used for radiographic imaging:
(a)Calcium (b) Strontium (c) Barium (d) Beryllium
Answer: (c)
32. An anti-oxidant often added to fat containing foods to prevent rancidity:
(a)Ethyl benzoate (b) Methylated chlorobenzene
(c) Butyrated hydroxi anisole (d) Propyl alcohol
Answer: (c)
33. Which of the following insoluble in water?
(a)Silver Chloride (b) Calcium Chloride
(c) Sodium Nitrate (d) Magnisium Sulphate
Answer: (a)
34. An example of mineral acid:
(a)Citric acid (b) Formic acid
(c) Tartaric acid (d) Hydrochloric acid
Answer: (d)
35. The most abundant type of coal:
(a)Bituminous (b) Anthrasite (c) Lignite (d) None of these
Answer: (a)
36. Pigments obtained from plants can be separated by:
(a)Magnet (b) Crystallisation
(c) Chromatography (d) Separating Funnel
Answer: (c)
37. Potassium permanganate is used to purify water. Which among the following properties of it helps in this action?
(a)Reducing (b) Oxidising (c) Sterilizing (d) Leaching
Answer: (b)
38. What type of reaction is in the digestion offood in human body?
(a)Decomposition (b) Hydrogenation
(c) Calcination (d) Incubation
Answer: (a)
39. Which of the following is called the ‘Mother of Pearl’?
(a)Ammolite (b) Nacre (c) Tusk (d) Sea shell
Answer: (b)
40. Bleaching powder contains;
(a)Magnisium (b) Sodium (c) Calcium (d) Potassium
Answer: (c)
41. It is easily noticed the smell of the LPG gas because of which among the following?
(a)Butane (b) Propane (c) Methane (d) Ethanethiol
Answer: (d)
42. Teflon, the tough and fire resistant polymer, containing the halogen:
(a)Chlorine (b) Flourine (c) Iodine (d) Bromine
Answer: (b)
43. Froth and foams are examples of the following:
(a)Gas suspended in liquid
(b) Liquid suspended in gas
(c) Solid suspended in gas
(d) None of these
Answer: (a)
44. The discomfort due to indigestion can be cured by taking:
(a)Baking soda (b) Vinegar (c) Naphthalene (d) Benzene
Answer: (a)
45. Chemical properties mostly resemble those of :
(a)Gold (b) Platinum (c) Barium (d) Germanium
Answer: (c)
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)
61. Sir Humphry Davy discovered:
(a) Helium (b) Hydrogen
(c) Sodium (d) Oxygen
Answer: (c)
62. A natural fertilizer:
(a) Urea (b) Ammonium Nitrate
(c) Compost (d) Ammonium Nitrate
Answer: (c)
63. Which metal is not used as electromagnet?
(a) Iron (b) Copper
(c) Nickel (d) Cobalt
Answer: (b)
64. Radium is chemically similar to:
(a) Calcium (b) Hydrogen
(c) Helium (d) Iron
Answer: (a)
65. Which is used as eye wash?
(a) Hydrocyanic acid (b) Boric acid
(c) Tannic acid (d) Citric acid
Answer: (b)
66. Commercial Vaseline is derived from :
(a) Plant gums (b) Coaltar
(c) Wool wax (d) Petroleum
Answer: (d)
67. The process involving in making soap is:
(a) Saponification (b) Hydrolysis
(c) Condensation (d) Polymerisation
Answer: (a)
68. Neoprene, a synthetic rubber, is made from:
(a) Dichloroethane
(b) 2-Chlorobutadiene
(c) Carboxy- Methyl Cellulose (d) Methanol
Answer: (b)
69. The second mostabundant gas in the atmosphere of the Earth:
(a) Oxygen (b) Argon
(c) C02 (d) Hydrogen
Answer: (a)
70. Kerosene was discovered in 1853 by:
(a) Humphrey Dewey (b) Faraday
(c) Kekule (d) Abraham Gesner
Answer: (d)
71. The poisonous gas emitted from the engines of two wheelers:
(a) Phosgene (b) Chlorine
(c) Carbon Monoxide (d) Methyl Iso Cyanate
Answer: (c)
72. The only substance in that exists in nature in three forms solid, liquid and gas:
(a) Water (b) Coal
(c) Dry ice (d) Urea
Answer: (a)
73. Purest form of water
(a) River water (b) Sea water
(c) Pond water (d) Rain water
Answer: (d)
74. Element present in DNA and RNA:
(a) Sulphur (b) Iron
(c) Calcium (d) Phosphorus
Answer: (d)
75. The chemical that causes acid rain:
(a) Sulphur dioxide (b) Silver iodide
(c) Silver bromide (d) Ozone
Answer: (a)
76. Which is also known as ‘paraffin oil’?
(a) Petrol (b) Diesel
(c) Kerozene (d) Naphta
Answer: (c)
77. Gottileb Daimler invented
(a) Petrol engine (b) Diesel engine
(c) Carburettor (d) Jet Engine
Answer: (c)
78. The temperature at which it will continue to bum for at least fiveseconds after ignition by an open flame is called:
(a) fire point (b) flash point
(c) Autoignition point
(d) Octane number
Answer: (a)
79. The Basel Convention is related to:
(a) Hazardous Wastes (b) War Prisoners
(c) Nuclear Weapons (d) Drugs
Answer: (a)
80. What is known as ‘king of chemicals’?
(a) Hydrochloric acid (b) Sulphuric acid
(c) Nitric acid
(d) Acetic acid
Answer: (b)
81. The acid present in eye lotion:
(a) Citric acid (b) Boric acid
(c) Nitric acid (d) Carbolic acid
Answer: (b)
82. Which vitamin is also known as Ascorbic acid?
(a) Vitamin A
(b) Vitamin C
(c) Vitamin D
(d) Vitamin E
Answer: (b)
83. The gas used by plants to respire during day time:
(a) C02 (b) Methane
(c) Nitrogen (d) Oxygen
Answer: (d)
84. The gas used in factories to make Soda Water
(a) Carbon Dioxide (b) Ozone
(c) Ammonia (d) Helium
Answer: (a)
85. The second least dense metal:
(a) Potassium
(b) Sodium
(c) Aluminium
(d) Lithium
Answer: (a)
86. The hardest metal:
(a) iron (b) Iridium
(c) Chromium (d) Tungsten
Answer: (c)
87. Metal that is the best conductor of heat:
(a) Iron
(b) Gold
(c) Silver
(d) Copper
Answer: (c)
88. Stibnite is the ore of:
(a) Antimony (b) Lead
(c) Tin (d) Zinc
Answer: (a)
89. Ore of chromium:
(a) Chromite
(b) Nichrome
(c) Wolfram
(d) Sphalerite
Answer: (a)
90. Magnesium silicate is:
(a) Soda ash
(b) Quartz
(c) Potash
(d) Talc
Answer: (d)
91. Which of the following is the lightest metal ?
Answer: Lithium
92. Carborandum is —
Answer: Silicon Carbide
93. Carbon, diamond and graphite are together called
Answer: allotropes
94. The most important ore of Aluminium is–
Answer: Bauxite
95. Which of the following is the best conductor of electricity ?
Answer: Silver
96. From which mineral is radium obtained ?
Answer: Pitchblende
97. The element present in the largest amount in rocks and minerals is–
Answer: Silicon
98. Washing soda is the common name of —
Answer: Sodium Carbonate
99. Tetraethyl lead is used as
Answer: Petrol additive
100. The chemial name of Uria is–
Answer: Carbamide
101. The filament of electric bulb is made of —
Answer: Tungsten
102.Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
Answer: zeolites
103. Permanent hardness of water can be removed by adding–
Answer: Washing Soda
104. Bleaching powder is made from —
Answer: Lime and Chlorine
105.Which of the following metals remains in liquid form under normal conditions ?
Answer: Mercury
106. The formula of Plaster of Paris is–
Answer: 2CaSO4, H2O
107. The two elements that are frequently used for making transistors are —
Answer: Silicon and Germenium
108. By fixation of nitrogen is meant-
Answer: Conversion of atmospheric nitrogen into Useful compounds
109. Liquefied Petroleum gas (LPG) consists of mainly–
Answer: Methane, Butane and Propane
110. Which of the following gas is not known as green house gas ?
Answer: Nitrous oxide
111. When water freezes its density-
Answer: Decreases
112. Atoms of the same element, i. e., having the Same atomic number that differ in atomic Weight, are called-
Answer: Isotopes
113. The metal that is present in Photo Films is–
Answer: Silver
114. Which of the following is not a neutral oxide ?
Answer: Sulphur Dioxide
115. The manufacture of iron ore Involves the process of-
Answer: Reduction
116. Which of the following is in liquid form at room temperature ?
Answer: Francium
117. Which of the following is used in making smoke bombs ?
Answer: Phosphorus
118. Which of the following has the strongest Bleaching property?
Answer: Chlorine
119. The property of a substance to absorb moisture from the air on exposure is called–
Answer: Deliquescene
120. Caustic Soda is —
Answer: NaOH
121. Nitric acid does not react with-
Answer: Gold
122. Brass gets discoloured in air due to the presence of which gas in air–
Answer: Hydrogen Sulphide
123. Which of the following is not a bleaching agent?
Answer: Carbon dioxide
124. Oxygen is manufactured by the fractional Evaporation of-
Answer: Liquid air
125. Quartz crystals normally used in quartz clocks etc. is chemically–
Answer: Silicon dioxide
126. The gas usually filled in electric bulb is —
Answer: Nitrogen
127. Sodium burns in air to give-
Answer: Sodium peroxide
128. Which of the following elements is non-radioactive?
Answer: Zirconium
129. Heavy water is —
Answer: Deuterium oxide
130. Argon gas was discovered by-
Answer: William Ramsay
131. Most soluble in water is —
Answer: Sugar
132. One fathom is equal to–
Answer: 6 feet
133. According to Dalton’s atomic theory the smallest particle which can exist independently is–
Answer: An atom
134. The gases used in different types of welding would include —
Answer: Oxygen & acetylene
135. Formaldehyde is the starting material for The manufacture of-
Answer: Bakelite
136. The recent atomic weight scale is based on–
Answer: 6C12
137. Which of the following alloys is used for making magnets ?
Answer: Alnico
138. The phenomenon of “metamerism” is Shown by-
Answer: Methyl propylether and diethyl ether
139. The major ingredient of leather is–
Answer: Collagen
140. Chemically, vitamin C is __?
Answer: Ascorbic acid
141. If two liquids have widely different boiling Points, they may be separated by-
Answer: Fractional distillation
142. Glass is made from the mixture of–
Answer: Sand and silicates
143. Which of the following can be used as an anaesthetic?
Answer: Nitrous oxide
144. Which of the following is not an ore of Aluminium?
Answer: Azurite
145. Epoxy resins is used as–
Answer: Adhesives
146. Commercial acetic acid is used in the preparation of ?
Answer: Vinegar
147. Most soluble in water is —
Answer: Sugar
148. One fathom is equal to–
Answer: 6 feet
149. An ice cube is floating on the surface of water. How will the water level be affected by melting of this ice cube ?
Answer: Water level will remain the same
150. Bromine is —
- Answer: A red liquid.
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