MCQOPTIONS
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MCQOPTIONS
This section includes 180 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The moderator used in a nuclear reactor is |
| A. | Uranium |
| B. | Radium |
| C. | Ordinary water |
| D. | Graphite |
| Answer» D. Graphite | |
| 52. |
Which of the following will replace hydrogen from acids to form salts ? |
| A. | S |
| B. | Na |
| C. | Ag |
| D. | P |
| Answer» C. Ag | |
| 53. |
A non electronic conductor is |
| A. | Iron |
| B. | Gas Carbon |
| C. | Copper Sulphate |
| D. | Mercury |
| E. | None of these |
| Answer» F. | |
| 54. |
Which one of the folling is also khow as solution ? |
| A. | A compound |
| B. | A homogeneous mixture |
| C. | A heterogeneous mixture |
| D. | A suspension |
| Answer» C. A heterogeneous mixture | |
| 55. |
Muddy water is treated with alum in purification process, itis termed as : |
| A. | emulsification |
| B. | absorption |
| C. | adsorption |
| D. | coagulation |
| Answer» E. | |
| 56. |
Which of the following elements does not exhibit natural radioactivity ? |
| A. | Uranium |
| B. | Thorium |
| C. | Aluminium |
| D. | Polonium |
| Answer» D. Polonium | |
| 57. |
Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below. |
| A. | B, D and E |
| B. | A, B, C, D and E |
| C. | A, C and E |
| D. | A and C |
| Answer» D. A and C | |
| 58. |
What happens when a drop of glycerol is added to crushed KMnO |
| A. | There is a crackling sound. |
| B. | There is a violent explosion. |
| C. | There is no reaction. |
| D. | The paper ignites. |
| Answer» C. There is no reaction. | |
| 59. |
The term brown air is used for |
| A. | Acid fumes |
| B. | Photochemical smog |
| C. | Sulphurous smog |
| D. | Industrial smog |
| Answer» C. Sulphurous smog | |
| 60. |
The chemical name of Hypo commonly used in photography is |
| A. | Sodium thiosulphate |
| B. | Silver nitrate |
| C. | Sodium nitrate |
| D. | Silver iodide |
| Answer» B. Silver nitrate | |
| 61. |
Bayer s reagent is |
| A. | Alkaline potassium permanganate |
| B. | Acidified potassium permanganate |
| C. | Hydrogen peroxide |
| D. | Bromine water |
| Answer» B. Acidified potassium permanganate | |
| 62. |
Radioactive elements emit : |
| A. | Radiowaves |
| B. | Infrared waves |
| C. | Ultraviolet waves |
| D. | and radiations |
| Answer» E. | |
| 63. |
The alkoloid naturally found in coffee, cocoa and cola nut is |
| A. | Cocaine |
| B. | Morphine |
| C. | Tannin |
| D. | Caffeine |
| Answer» E. | |
| 64. |
The gas used to extinguish fireis |
| A. | Neon |
| B. | Nitrogen |
| C. | Carbon dioxide |
| D. | Carbon monoxide |
| Answer» E. | |
| 65. |
Which of the following is colourless ? |
| A. | Chlorine |
| B. | Oxygen |
| C. | Phosphorus |
| D. | Sulphur |
| Answer» C. Phosphorus | |
| 66. |
In addition to hydrogen, the other abundant element present on Sun s surface is |
| A. | Helium |
| B. | Neon |
| C. | Argon |
| D. | Oxygen |
| Answer» B. Neon | |
| 67. |
Bakelite is a copolymer of Phenol and |
| A. | Formaldehyde |
| B. | Acetaldehyde |
| C. | Benzaldehyde |
| D. | Cinnaldehyde |
| Answer» B. Acetaldehyde | |
| 68. |
Which of the following statements are correct about chloroform? |
| A. | a, b |
| B. | a, c |
| C. | b, c |
| D. | d, a |
| Answer» D. d, a | |
| 69. |
Which one of the following is not a green house gas ? |
| A. | Chlorofluorocarbons |
| B. | Methane |
| C. | Carbon dioxide |
| D. | Nitrogen |
| Answer» E. | |
| 70. |
Fire-fighting clothes are made from |
| A. | Mica |
| B. | Asbestos |
| C. | Talc |
| D. | Steatite |
| Answer» C. Talc | |
| 71. |
Which of the following causes the rusting of iron? |
| A. | a and b |
| B. | b and c |
| C. | c and d |
| D. | a and c |
| Answer» E. | |
| 72. |
Which one of the following group of gases contribute to the Green House Effect ? |
| A. | Carbon dioxide and Methane |
| B. | Ammonia and Ozone |
| C. | Carbon monoxide and Sulphur dioxide |
| D. | Carbon tetraflouride and Nitrous oxide |
| Answer» B. Ammonia and Ozone | |
| 73. |
Which one of the following is known as the brown coal ? |
| A. | Anthracite |
| B. | Bituminous |
| C. | Coke |
| D. | Lignite |
| Answer» E. | |
| 74. |
Which of the following imparts a blue colour to glass ? |
| A. | Cabalt oxide |
| B. | Copper oxide |
| C. | Iron oxide |
| D. | Nickel oxide |
| Answer» B. Copper oxide | |
| 75. |
The technique of calculating the age of fossil organisms is |
| A. | Radiocarbon dating |
| B. | Electroporation |
| C. | Counting the annual rings |
| D. | Micromanipulation |
| Answer» B. Electroporation | |
| 76. |
The process by which milk is converted to curd is called |
| A. | Pasteurization |
| B. | Vernalization |
| C. | Fermentation |
| D. | Retting |
| Answer» D. Retting | |
| 77. |
Philosopher s wool is chemically |
| A. | Aluminium oxide |
| B. | Magnesium oxide |
| C. | Zinc oxide |
| D. | Calcium oxide |
| Answer» D. Calcium oxide | |
| 78. |
The lightest radioactive elementis |
| A. | deuterium |
| B. | polonium |
| C. | tritium |
| D. | uranium |
| Answer» D. uranium | |
| 79. |
Aerosol is |
| A. | Suspended solid particles in air |
| B. | Pollutant gas, present in air |
| C. | Microbes, present in air |
| D. | Green house gas present in air |
| Answer» B. Pollutant gas, present in air | |
| 80. |
Earth s atmosphere is an envelope of gases extending to a height of |
| A. | 100 km |
| B. | 150 km |
| C. | 200 km |
| D. | 300 km |
| Answer» D. 300 km | |
| 81. |
Philosopher s Wool is |
| A. | Zinc carbonate |
| B. | Zinc sulphate |
| C. | Zinc oxide |
| D. | Zinc blende |
| Answer» D. Zinc blende | |
| 82. |
The Green House effect is produced due to the presence of excess amount of |
| A. | Sulphur dioxide |
| B. | Nitrogen dioxide |
| C. | Carbon monoxide |
| D. | Methane |
| Answer» E. | |
| 83. |
Which of the following is used as a moderator in nuclear reactors ? |
| A. | Thorium |
| B. | Graphite |
| C. | Ordinary water |
| D. | Radium |
| Answer» C. Ordinary water | |
| 84. |
Permanent hardness of water may be removed by addition of |
| A. | Alum |
| B. | Sodium carbonate |
| C. | Lime |
| D. | Potassium Permangante |
| Answer» D. Potassium Permangante | |
| 85. |
Which one of the following is not a characteristic feature of alloys? They are |
| A. | Compounds |
| B. | Mixtures |
| C. | Solutions |
| D. | Homogeneous systems |
| Answer» E. | |
| 86. |
Which one of the following contributes largely to the green house effect ? |
| A. | Ozone |
| B. | Carbon monoxide |
| C. | Carbon dioxide |
| D. | Water vapour |
| Answer» E. | |
| 87. |
The particle required to continue the chain process of Uranium fission is : |
| A. | Electron |
| B. | Proton |
| C. | Neutron |
| D. | Positron |
| Answer» D. Positron | |
| 88. |
A nibble is equal to_____ bits. |
| A. | 32 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» C. 8 | |
| 89. |
Radiations which is not emitted during radioactivity is : |
| A. | rays |
| B. | ravs |
| C. | ravs |
| D. | Cathode rays |
| Answer» E. | |
| 90. |
How many bones are there in a newly born infant ? |
| A. | 206 |
| B. | 230 |
| C. | 280 |
| D. | 300 |
| Answer» D. 300 | |
| 91. |
Which of the following is not a chemical reaction'? |
| A. | Burning of paper |
| B. | Digestion ot" food |
| C. | Conversion of water into steam |
| D. | Burning of coal |
| Answer» D. Burning of coal | |
| 92. |
KMnO |
| A. | Insecticide |
| B. | Fertilizer |
| C. | Pesticide |
| D. | Disinfectant |
| Answer» E. | |
| 93. |
The percentage of litrogen in Airis |
| A. | 0.94 |
| B. | 0.03 |
| C. | 78.03 |
| D. | 85.02 |
| Answer» D. 85.02 | |
| 94. |
Atomic theory of matter was given by |
| A. | Avogadro |
| B. | Dalton |
| C. | Newton |
| D. | Pascal |
| Answer» C. Newton | |
| 95. |
Which of the following is the maximum number of electrons that can be present in M-shell? |
| A. | 2 |
| B. | 8 |
| C. | 18 |
| D. | 32 |
| Answer» D. 32 | |
| 96. |
Rutherford s scattering experiment proved the presence of |
| A. | atoms in all matter |
| B. | electrons in atoms |
| C. | neutrons in atoms |
| D. | nucleus in atoms |
| Answer» E. | |
| 97. |
Name two elements that find wide application in transistor industry |
| A. | Silicon and Germanium |
| B. | Carbon and Platinum |
| C. | Iridium and Germanium |
| D. | Tungsten and Platinum |
| Answer» B. Carbon and Platinum | |
| 98. |
Gelatin is mostly used in making ice creams in order to |
| A. | prevent making a colloid |
| B. | stabilise the colloid and prevent crystallisation |
| C. | stabilise mixture |
| D. | enrich the aroma |
| Answer» C. stabilise mixture | |
| 99. |
The electronic configuration of an atom having atomic number 20 is |
| A. | 2, 8, 10 |
| B. | 2, 6, 8, 4 |
| C. | 2, 8, 8, 2 |
| D. | 2, 10, 8 |
| Answer» D. 2, 10, 8 | |
| 100. |
Which halide is used in making sensitive emulsion onphotograhic film? |
| A. | Sodium chloride |
| B. | Silver bromide |
| C. | Silver iodide |
| D. | Silver chloride |
| Answer» C. Silver iodide | |