MCQOPTIONS
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MCQOPTIONS
This section includes 856 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In a period from Li to F, ionisation potential |
| A. | annot be predicted |
| B. | ncreases |
| C. | ecreases |
| D. | emains same |
| Answer» B. ncreases | |
| 52. |
The element with highest first ionisation energy is |
| A. | ydrogen |
| B. | elium |
| C. | ithium |
| D. | odium |
| Answer» C. ithium | |
| 53. |
Which of the following is not a natural source of hydrocarbon? |
| A. | atural Gas |
| B. | oal |
| C. | etroleum |
| D. | ica |
| Answer» E. | |
| 54. |
Which one is the simplest form of alkane? |
| A. | ropane |
| B. | utane |
| C. | ethane |
| D. | ecane |
| Answer» D. ecane | |
| 55. |
Ethanol containing 5% water is known as : |
| A. | ilute alcohol |
| B. | ower alcohol |
| C. | ectified spirit |
| D. | bsolute alcohol |
| Answer» D. bsolute alcohol | |
| 56. |
By which organic compound all the oils are known ? |
| A. | arbohydrate |
| B. | rotein |
| C. | ydrocarbon |
| D. | ster |
| Answer» D. ster | |
| 57. |
The natural source of hydrocarbon is |
| A. | rude oil |
| B. | iomass |
| C. | oal |
| D. | arbohydrates |
| Answer» B. iomass | |
| 58. |
The gas used for artificial fruit ripening of green fruit is – |
| A. | thylene |
| B. | cetylene |
| C. | thane |
| D. | ethane |
| Answer» B. cetylene | |
| 59. |
One of the following is used to dissolve noble metals. That is |
| A. | itric acid |
| B. | ydrochloric acid |
| C. | ulphuric acid |
| D. | qua regia |
| Answer» E. | |
| 60. |
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume |
| A. | onc. HNO3 and conc. HCl |
| B. | onc. HNO3and conc. H2SO4 |
| C. | il. HCl and dil. HNO3 |
| D. | onc. HCl and conc. HNO3 |
| Answer» B. onc. HNO3and conc. H2SO4 | |
| 61. |
Nitrogen in water is commonly found in the form of |
| A. | itrous oxide |
| B. | itrate |
| C. | itric oxide |
| D. | itrite |
| Answer» E. | |
| 62. |
Gold dissolves in |
| A. | ydrochloric acid |
| B. | itric acid |
| C. | qua regia |
| D. | cetic acid |
| Answer» D. cetic acid | |
| 63. |
The next higher homologue of C6H14 is |
| A. | 7H14 |
| B. | 7H12 |
| C. | 6H12 |
| D. | 7H16 |
| Answer» E. | |
| 64. |
The gas which emits from rice field is |
| A. | thane |
| B. | ethane |
| C. | itrogen |
| D. | ll of the above |
| Answer» C. itrogen | |
| 65. |
Choose the incorrect statement pertaining to organic compounds |
| A. | hey have low melting and boiling points |
| B. | hey do not dissolve in water |
| C. | hey are not easily combustible |
| D. | hey contain mainly carbon and hydrogen |
| Answer» D. hey contain mainly carbon and hydrogen | |
| 66. |
Commercial nitric acid is coloured because it contains dissolved : |
| A. | xygen |
| B. | itrous oxide |
| C. | itrogen dioxide |
| D. | oloured impurities |
| Answer» D. oloured impurities | |
| 67. |
The important ore of aluminium is |
| A. | auxite |
| B. | ryolite |
| C. | luorspar |
| D. | aematite |
| Answer» B. ryolite | |
| 68. |
The manufacturing of iron from iron ore involves the process of |
| A. | xidation |
| B. | eduction |
| C. | lectrolysis |
| D. | ractional distillation |
| Answer» C. lectrolysis | |
| 69. |
Of the following commonly used materials, the one that is not an alloy is |
| A. | teel |
| B. | rass |
| C. | ronze |
| D. | opper |
| Answer» E. | |
| 70. |
Which of the following is used in welding broken pieces of iron rails and machine parts? |
| A. | luminium sulphate |
| B. | older |
| C. | luminium powder |
| D. | one of the above |
| Answer» D. one of the above | |
| 71. |
Copper is refined by |
| A. | oasting |
| B. | xidation |
| C. | lectrolysis |
| D. | one refining |
| Answer» B. xidation | |
| 72. |
Percentage of carbon in steel ranges from |
| A. | .1 to 1.5 |
| B. | .5 to 3.0 |
| C. | .0 to 4.0 |
| D. | .0 to 6.0 |
| Answer» B. .5 to 3.0 | |
| 73. |
Brass is made of |
| A. | opper and tin |
| B. | in and lead |
| C. | opper and zinc |
| D. | opper, tin and zinc |
| Answer» D. opper, tin and zinc | |
| 74. |
Brass is an alloy of : |
| A. | u, Al and Zn |
| B. | u and Sn |
| C. | u and Zn |
| D. | l and Mg |
| Answer» D. l and Mg | |
| 75. |
Brass is a |
| A. | ompound |
| B. | lement |
| C. | omogeneous mixture |
| D. | eterogeneous mixture |
| Answer» D. eterogeneous mixture | |
| 76. |
Bauxite is used as raw material by which industry ? |
| A. | luminium |
| B. | ron |
| C. | teel |
| D. | old |
| Answer» B. ron | |
| 77. |
Stainless steel is usually made by alloying the steel with |
| A. | opper and nickel |
| B. | opper and chromium |
| C. | hromium and nickel |
| D. | anganese and copper |
| Answer» D. anganese and copper | |
| 78. |
Heating of a ore below its melting point in the absence of air is known as |
| A. | efining |
| B. | alcination |
| C. | oasting |
| D. | melting |
| Answer» C. oasting | |
| 79. |
The acid which is secreted by the glands in the stomach wall is |
| A. | ulphuric acid |
| B. | ydrochloric acid |
| C. | itric acid |
| D. | hosphoric acid |
| Answer» D. hosphoric acid | |
| 80. |
________ gives hardness to stainless steel. |
| A. | inc |
| B. | ead |
| C. | arbon |
| D. | in |
| Answer» D. in | |
| 81. |
Which of the following metals form an amalgam with other metals ? |
| A. | ead |
| B. | in |
| C. | inc |
| D. | ercury |
| Answer» E. | |
| 82. |
The important metal used with iron to produce stainless steel is |
| A. | luminium |
| B. | hromium |
| C. | in |
| D. | arbon |
| Answer» C. in | |
| 83. |
Which of the following is an iron ore ? |
| A. | auxite |
| B. | agnetite |
| C. | ignite |
| D. | itrite |
| Answer» C. ignite | |
| 84. |
An alloy used in making heating elements for electric heating device is |
| A. | older |
| B. | lloy Steel |
| C. | ichrome |
| D. | erman Silver |
| Answer» D. erman Silver | |
| 85. |
Bleaching powder is prepared by passing : |
| A. | hlorine over slaked lime |
| B. | xygen over slaked lime |
| C. | arbon dioxide over slaked lime |
| D. | hlorine over quick lirne |
| Answer» B. xygen over slaked lime | |
| 86. |
Aluminium can be purified by |
| A. | xidation |
| B. | istillation |
| C. | lectrolysis |
| D. | zonolysis |
| Answer» D. zonolysis | |
| 87. |
Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives |
| A. | opper at cathode and oxygen at anode |
| B. | opper at anode and oxygen at cathode. |
| C. | opper at cathode and anodes dissolve to give copper |
| D. | ydrogen at cathode and oxygen at anode |
| Answer» B. opper at anode and oxygen at cathode. | |
| 88. |
Which of the following electrodes is used in strongly alkaline solution? |
| A. | ercury - mercuric oxide electrode |
| B. | ercury - mercurous sulphate electrode |
| C. | ercury - mercurous chloride electrode |
| D. | ilver - silver chloride electrode |
| Answer» B. ercury - mercurous sulphate electrode | |
| 89. |
In electro-refining, the pure metal is deposited on |
| A. | essel |
| B. | lectrolyte |
| C. | athode |
| D. | node |
| Answer» D. node | |
| 90. |
Water gas is the mixture of |
| A. | arbon dioxide and hydrogen |
| B. | arbon monoxide and nitrogen |
| C. | arbon monoxide and hydrogen |
| D. | arbon dioxide and nitrogen |
| Answer» D. arbon dioxide and nitrogen | |
| 91. |
Which of the following is used in making smoke bombs? |
| A. | ulphur |
| B. | hosphorus |
| C. | ydrogen |
| D. | arbon |
| Answer» E. | |
| 92. |
Which of the following is used as a lubricant in heavy machines? |
| A. | auxite |
| B. | ulphur |
| C. | hosphorus |
| D. | raphite |
| Answer» E. | |
| 93. |
Why is water not suitable for putting out a petrol fire ? |
| A. | he oxygen content of water is isolated by petrol and thus it helps in burning |
| B. | etrol is too inflammable to be extinguished by water |
| C. | he heat required for combustion of petrol is very low |
| D. | ater, being heavy, slips below petrol which thus remains in contact with air and burns |
| Answer» E. | |
| 94. |
Which of the following gases is most toxic ? |
| A. | arbon dioxide |
| B. | arbon monoxide |
| C. | ulphur dioxide |
| D. | hlorine |
| Answer» C. ulphur dioxide | |
| 95. |
Carbon footprint can be reduced by |
| A. | ll of these |
| B. | ecycling waste materials |
| C. | sing energy efficient appliances |
| D. | ommuting by public transport |
| Answer» B. ecycling waste materials | |
| 96. |
1 carat of diamond is equal to |
| A. | 00 mg |
| B. | 00 g |
| C. | 00 mg |
| D. | 00 g |
| Answer» B. 00 g | |
| 97. |
24 carat of diamond is equal to |
| A. | 00 mg |
| B. | 00 g |
| C. | 5% mg |
| D. | 1% gold |
| Answer» B. 00 g | |
| 98. |
The open "Sigrees" or coal stoves often require fanning to sustain burning because of |
| A. | endency of carbon dioxide to form a layer along with dust smoke |
| B. | ack of oxygen in the surroundings of sigrees |
| C. | ccumulation of smoke and dust over the sigrees |
| D. | nterrupted release of moisture from the material |
| Answer» B. ack of oxygen in the surroundings of sigrees | |
| 99. |
Which of the following is used as filler in tyre of rubber ? |
| A. | arbon black |
| B. | oal |
| C. | oke |
| D. | raphite |
| Answer» B. oal | |
| 100. |
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is |
| A. | ydrogen |
| B. | xygen |
| C. | arbon dioxide |
| D. | ll of them |
| Answer» D. ll of them | |