MCQOPTIONS
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MCQOPTIONS
This section includes 279 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which of the following acts as an antidote to HgCl2 poisoning ? |
| A. | Yellow of egg |
| B. | egg of fish |
| C. | white of egg |
| D. | egg |
| Answer» D. egg | |
| 52. |
Mohr's salt on oxidation with conc HNO3 is |
| A. | Neutral |
| B. | Basic |
| C. | Amphoteric |
| D. | Acidic |
| Answer» E. | |
| 53. |
The element which is not a liquid at room temperatre (30 C) is |
| A. | Hg |
| B. | Ga |
| C. | Br |
| D. | Ge |
| Answer» E. | |
| 54. |
Consider the following statements :The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is1. to keep the washing powder dry2. to maintain the alkalinity of the powderWhich of these statements is/are correct ? |
| A. | Only 1 |
| B. | Only 2 |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» D. Neither 1 nor 2 | |
| 55. |
Match the List-I with List-II and select the correct answer using the codes given below the ListsList-IList-IIF. Blue vitriol1.Sodium bicarbonateG. Epsom salt2.Sodium hydroxideH. Baking soda3.Magnesium sulphateJ. Caustic soda4.Copper sulphateCodes :FGHJA.3421B.4321C.3412D.4312 |
| A. | A. |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» E. | |
| 56. |
Which of the following compounds of zine is white when cold and yellow when hot ? |
| A. | ZnS |
| B. | ZnCl |
| C. | ZnSO |
| D. | ZnO |
| Answer» E. | |
| 57. |
Assertion (A) : Sodium metal is stored under kerosene.Reason (R) : Metallic sodium melts when exposed to air.Codes |
| A. | Both A and R is true and R is the correct explanation of A |
| B. | Both A and R is true but R is not a correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» D. A is false but R is true | |
| 58. |
Iron loses magnetic property at |
| A. | Melting point |
| B. | Curie point |
| C. | 1000 |
| D. | K |
| E. | Boiling point |
| Answer» D. K | |
| 59. |
How many electrons are involved in the oxidation by KMnO4 in basic medium ? |
| A. | 5 |
| B. | 3 |
| C. | 2 |
| D. | 4 |
| Answer» E. | |
| 60. |
Consider the following statements :Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to 1. act as the reducing agent2. remove silica associated with the iron ore3. function as fuel, to supply heat4. act as an oxidizing agentOf these statements |
| A. | 1 and 2 are correct |
| B. | 2 and 4 correct |
| C. | 1 and 3 are correct |
| D. | 3 and 4 are correct |
| Answer» D. 3 and 4 are correct | |
| 61. |
The number of unpaired electrons in Fe+2, Fe+3, Ni+2 are respectively |
| A. | 4,5,5 |
| B. | 4,5,2 |
| C. | 5,2,4 |
| D. | 5,4,2 |
| Answer» C. 5,2,4 | |
| 62. |
The metal constituent of |
| A. | Iron |
| B. | Potassium |
| C. | Manganese |
| D. | Magnesium |
| Answer» E. | |
| 63. |
A common metal used for the extraction of metals from their oxides by reduction is |
| A. | Fe |
| B. | Al |
| C. | Cr |
| D. | Co |
| Answer» C. Cr | |
| 64. |
The most reactive metal in the universe is |
| A. | Na |
| B. | K |
| C. | Al |
| D. | Zn |
| Answer» C. Al | |
| 65. |
The purpose of smelting an ore to |
| A. | reduce it |
| B. | oxide it |
| C. | obtain an alloy |
| D. | separate volatile impurities |
| Answer» B. oxide it | |
| 66. |
Which is based on the phenomenon of hydrolysis is called |
| A. | poling |
| B. | liquation |
| C. | hydrometallurgy |
| D. | electrorefining |
| Answer» E. | |
| 67. |
Which of the following elements are analogous to the lanthanides ? |
| A. | borides |
| B. | carbides |
| C. | hydrides |
| D. | actinides |
| Answer» E. | |
| 68. |
An aqueous solution of copper sulphate is acidica in nature because the salt undergoes |
| A. | dialysis |
| B. | electrolysis |
| C. | hydrolysis |
| D. | photolysis |
| Answer» D. photolysis | |
| 69. |
Silver metal is obtained by |
| A. | Parke's process |
| B. | Froth floatation process |
| C. | Carbon reduction process |
| D. | Magnetic separation |
| Answer» B. Froth floatation process | |
| 70. |
Which one of the following does not form amalgam ? |
| A. | Ag |
| B. | Cu |
| C. | Fe |
| D. | Zn |
| Answer» D. Zn | |
| 71. |
Which one of the following materials is very hard and very ductile ? |
| A. | carborundum |
| B. | tungsten |
| C. | cast iron |
| D. | nichrome |
| Answer» E. | |
| 72. |
Rocy impurities present in a mineral are called |
| A. | flux |
| B. | gengue |
| C. | matte |
| D. | slag |
| Answer» C. matte | |
| 73. |
Lithium can react with water but cannot fuse in it due to |
| A. | high boiling point |
| B. | high melting point |
| C. | low boiling point |
| D. | low melting point |
| Answer» C. low boiling point | |
| 74. |
Which of the following is an ore of sodium ? |
| A. | Chile saltpetre |
| B. | carnallite |
| C. | sylvine |
| D. | none of these |
| Answer» B. carnallite | |
| 75. |
The element which has highest density is |
| A. | Pd |
| B. | Pt |
| C. | W |
| D. | Os |
| Answer» E. | |
| 76. |
The man-made transition element is |
| A. | Zr |
| B. | Tc |
| C. | Sc |
| D. | Hf |
| Answer» C. Sc | |
| 77. |
Carbon decomposes potassium carbonate into |
| A. | C |
| B. | O |
| C. | KCN |
| D. | K |
| Answer» E. | |
| 78. |
Perchloric acid is prepared by the action of concentrate sulphuric acid on |
| A. | potassium perchlorate |
| B. | barium chlorated |
| C. | barium chloride |
| D. | sodium chloride |
| Answer» B. barium chlorated | |
| 79. |
Which metal is obtained by amalgamation process ? |
| A. | Ag |
| B. | Al |
| C. | Cu |
| D. | Hg |
| Answer» B. Al | |
| 80. |
What happens when Fe metal is rusted ? |
| A. | Iodised |
| B. | Oxidised |
| C. | Ionised |
| D. | None of these |
| Answer» C. Ionised | |
| 81. |
Heating of pyrites in air to remove sulphur is known as |
| A. | roasting |
| B. | calcination |
| C. | smelting |
| D. | fluxing |
| Answer» B. calcination | |
| 82. |
The active metals are extracted from their ores by the process of reduction with |
| A. | hydrogen |
| B. | carbon |
| C. | electric current |
| D. | aluminium |
| Answer» D. aluminium | |
| 83. |
Which of the following metal does not show variable valance ? |
| A. | Pb |
| B. | Ba |
| C. | Cu |
| D. | None of these |
| Answer» C. Cu | |
| 84. |
A naturally occuring substance from which a metal can be profitably extracted is called |
| A. | mineral |
| B. | gangue |
| C. | ore |
| D. | flux |
| Answer» D. flux | |
| 85. |
The forth floation process is used for the concentration of |
| A. | oxide ores |
| B. | sulphide ores |
| C. | halide ores |
| D. | silicate ores |
| Answer» C. halide ores | |
| 86. |
Which of the following metals corrodes in moist air |
| A. | Au |
| B. | Ag |
| C. | Ni |
| D. | Fe |
| Answer» E. | |
| 87. |
Iron is manufactured form the ore |
| A. | Cryolite |
| B. | Bauxite |
| C. | Haematite |
| D. | Chalcopyrite |
| Answer» D. Chalcopyrite | |
| 88. |
When metallic copper comes in contact with moisture, a green powdery/pasty coating can be seen over it. This is chemically known as |
| A. | copper carbonate-copper sulphate |
| B. | copper sulphate-copper sulphide |
| C. | copper carbonate-copper hydroxide |
| D. | copper sulphide-copper carbonate |
| Answer» D. copper sulphide-copper carbonate | |
| 89. |
Which method is used for the purification of Bauxite ore ? |
| A. | Magnetic separation |
| B. | Electrolysis |
| C. | Leaching |
| D. | Levigation |
| Answer» D. Levigation | |
| 90. |
Gravity separation process may be used for concentration of |
| A. | Calamine |
| B. | Chalcopyrite |
| C. | Haematite |
| D. | Bauxite |
| Answer» D. Bauxite | |
| 91. |
What happens, when potassium fire in laboratory is extinguished by pouring water ? |
| A. | decrease in fire intensity |
| B. | increase in fire intensity |
| C. | fire is completely extinguished |
| D. | none of the above |
| Answer» C. fire is completely extinguished | |
| 92. |
The magnetic separation is used for increasing concentration of the following |
| A. | horn silver |
| B. | calcite |
| C. | haematite |
| D. | magnesite |
| Answer» D. magnesite | |
| 93. |
The oil used in the floatation method for the purification of ores is |
| A. | coconut oil |
| B. | olive oil |
| C. | pine oil |
| D. | none |
| Answer» D. none | |
| 94. |
Ferrosilicon is used in steel industry as |
| A. | cutting tool |
| B. | alloying agent |
| C. | flux |
| D. | a reducing agent |
| Answer» C. flux | |
| 95. |
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 |
| Answer» B. heating the steel to a temperature much below redness and cooling it slowly | |
| 96. |
The iron obtained from blast furnace is |
| A. | soft iron |
| B. | big iron |
| C. | steel |
| D. | wrought iron |
| Answer» C. steel | |
| 97. |
Which one of the following ores contains both calcium and magnesium ? |
| A. | lime stone |
| B. | dolomite |
| C. | Epson salt |
| D. | carnallite |
| Answer» C. Epson salt | |
| 98. |
Which of the following is ferrous alloy ? |
| A. | Invar |
| B. | Solder |
| C. | Managlium |
| D. | Type steel |
| Answer» B. Solder | |
| 99. |
Silver containing lead as an impurity is removed by |
| A. | Poling |
| B. | Cupellation |
| C. | Lavigation |
| D. | Distillation |
| Answer» E. | |
| 100. |
Magnesium does not decompose in |
| A. | hot water |
| B. | steam |
| C. | semi hot water |
| D. | cold water |
| Answer» E. | |