MCQOPTIONS
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MCQOPTIONS
This section includes 181 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 electrical insulator among the four compounds provided below is |
| A. | Na₂O |
| B. | MgO |
| C. | Al₂O₃ |
| D. | SO₂ |
| Answer» E. | |
| 52. |
Fixed positions of valence electrons makes materials |
| A. | conductors |
| B. | insulators |
| C. | electrodes |
| D. | catalysts |
| Answer» C. electrodes | |
| 53. |
Potassium Hydroxide (KOH), Sodium Hydroxide (NaOH) and Copper Sulfate (CuSO₄) solutions are |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | acidic |
| Answer» B. non-electrolyte | |
| 54. |
A covalent liquid which does not conduct electricity is |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | a bad insulator |
| Answer» C. weak electrolyte | |
| 55. |
The number of specified particles in 1 mole is |
| A. | Avogadro constant |
| B. | formula mass |
| C. | Leonardo's number |
| D. | none of above |
| Answer» B. formula mass | |
| 56. |
For the electrolysis of aluminum oxide, it must be |
| A. | solid |
| B. | liquid |
| C. | vapor |
| D. | molten |
| Answer» E. | |
| 57. |
Alcohol (CnH₂n+1OH) is an example of |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | alkali |
| Answer» C. weak electrolyte | |
| 58. |
Ceramics can be molded into different types of shapes at a very higher temperature without affecting its |
| A. | strength |
| B. | effectiveness |
| C. | durability |
| D. | none of above |
| Answer» E. | |
| 59. |
Michal Faraday coined the words |
| A. | anode only |
| B. | cathode only |
| C. | electrode |
| D. | anode and cathode |
| Answer» E. | |
| 60. |
On passing electricity through electrolyte solution, |
| A. | the electrolyte splits up |
| B. | the electrolyte decomposes |
| C. | the ions migrate towards oppositely charged electrodes |
| D. | all of these |
| Answer» E. | |
| 61. |
Upon dissolving ionic substances or melting them, |
| A. | they become good conductor of electricity |
| B. | the crystal lattice gets destroyed |
| C. | they loose electrical conductivity |
| D. | both a and b |
| Answer» E. | |
| 62. |
The mass of a substance which has been produced at an electrode is directly proportional to the quantity of electricity passed, is |
| A. | Faraday's first law |
| B. | Faraday's second law |
| C. | Faraday's third law |
| D. | Newton's third law |
| Answer» B. Faraday's second law | |
| 63. |
When the rate of gain of electrons will be equal to the loss of electrons state obtained will be |
| A. | Redox equilibrium |
| B. | neutral |
| C. | constant |
| D. | unstable |
| Answer» B. neutral | |
| 64. |
Sugar solution (C₁₂H₂₂O₁₁) is |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | acidic |
| Answer» C. weak electrolyte | |
| 65. |
Metal core in power cable is normally made up of |
| A. | steel |
| B. | sulphur |
| C. | phosphorus |
| D. | mercury |
| Answer» B. sulphur | |
| 66. |
Glass, furnace lining and abrasive for grinding is done by the ceramic which contain |
| A. | magnesium oxide |
| B. | aluminum oxide |
| C. | silicon oxide |
| D. | nitrogen oxide |
| Answer» C. silicon oxide | |
| 67. |
Electroplating of chromium helps in manufacturing of |
| A. | car bumpers |
| B. | saucepans |
| C. | cutlery |
| D. | watches |
| Answer» B. saucepans | |
| 68. |
The effect of high voltage needed to discharge OH⁻ ion is called |
| A. | over voltage effect |
| B. | hydroxyl effect |
| C. | high effect |
| D. | none of above |
| Answer» B. hydroxyl effect | |
| 69. |
Turpentine is an example of |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | salt |
| Answer» C. weak electrolyte | |
| 70. |
In electroplating, solution must be of salt of metal |
| A. | to electroplate with |
| B. | of the object to be electroplated |
| C. | to any type of liquid |
| D. | sodium |
| Answer» B. of the object to be electroplated | |
| 71. |
The consumption of a typical smelting plant of aluminum is as much as electricity consumed by |
| A. | nuclear plant |
| B. | small town |
| C. | electrolytic cell |
| D. | steel and iron industry |
| Answer» C. electrolytic cell | |
| 72. |
The word E stands for |
| A. | standard electrode potential |
| B. | electrode |
| C. | electrode potential |
| D. | electrode charge |
| Answer» B. electrode | |
| 73. |
Electrolysis can be useful for |
| A. | electroplating |
| B. | electrorefinning |
| C. | electrocoating |
| D. | both a and b |
| Answer» D. both a and b | |
| 74. |
The negative electrode in a half cell is made up of |
| A. | hydrogen |
| B. | zinc |
| C. | copper |
| D. | tungsten |
| Answer» C. copper | |
| 75. |
Electrochemical cell is achieved by connecting two |
| A. | ions |
| B. | electrodes |
| C. | half cells |
| D. | none of above |
| Answer» D. none of above | |
| 76. |
Non-conductors of electricity include |
| A. | SO₃ |
| B. | Na₂O |
| C. | MgO |
| D. | Al₂O₃ |
| Answer» B. Na₂O | |
| 77. |
In the electrochemical cell, the movement of ions is inhibited by a |
| A. | salt bridge |
| B. | electrode |
| C. | solution |
| D. | solute |
| Answer» B. electrode | |
| 78. |
Sulfuric Acid (H₂SO₄) is an example of |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | natural acid |
| Answer» B. non-electrolyte | |
| 79. |
It is easier to reduce ion on the left if the electrode is |
| A. | more positive only |
| B. | less negative only |
| C. | neutral |
| D. | more positive and less negative |
| Answer» E. | |
| 80. |
Weak acids are weak electrolytes because |
| A. | the number of valence electrons are lower |
| B. | they contain only a few ions |
| C. | they have more hydrogens |
| D. | both a and b |
| Answer» E. | |
| 81. |
In a dry cell, electrolyte paste is formed of |
| A. | ammonium sulphate |
| B. | ammonium nitrate |
| C. | ammonium chloride |
| D. | zinc sulphate |
| Answer» D. zinc sulphate | |
| 82. |
After electrolysis of brine, resulting solution largely contains |
| A. | Cl₂ gas |
| B. | NaCl |
| C. | NaOH |
| D. | H₂ gas |
| Answer» D. H₂ gas | |
| 83. |
Oxidation of Hydrogen Gas (H₂) to prevent polarization occurs through |
| A. | paste of mangese oxide |
| B. | depolarizing mixture of manganese oxide and ammonium chloride |
| C. | powdered carbon |
| D. | carbon acting as the negative terminal |
| Answer» C. powdered carbon | |
| 84. |
Aluminum (Al) is being extracted from |
| A. | bauxite ore |
| B. | ferrous |
| C. | iron ore |
| D. | copper ore |
| Answer» B. ferrous | |
| 85. |
If the concentration of the solution will be greater, then the number of solute particles will be |
| A. | lower |
| B. | greater |
| C. | same |
| D. | equal |
| Answer» C. same | |
| 86. |
During electrolysis, the mass of a substance produced is proportional to |
| A. | time of constant current only |
| B. | strength of current only |
| C. | voltage provided |
| D. | time of constant current and strength of current |
| Answer» E. | |
| 87. |
In electrolysis of silver nitrate solution, silver is deposited at |
| A. | anode |
| B. | cathode |
| C. | inert electrode |
| D. | charged electrode |
| Answer» C. inert electrode | |
| 88. |
Either molten ionic compound or a concentrated aqueous compound, when it is decomposed it is called |
| A. | electrode |
| B. | electrolyte |
| C. | solution |
| D. | products |
| Answer» C. solution | |
| 89. |
In order to conduct electricity, ionic metals |
| A. | shall be dissolved in water |
| B. | shall be finely grinded |
| C. | shall be in molten form |
| D. | shall be in ionic lattices |
| Answer» D. shall be in ionic lattices | |
| 90. |
Pure copper (Cu) rod in a solution of copper(II) sulfate (CuSO₄) solution constitutes the |
| A. | half cell |
| B. | electrode |
| C. | ions |
| D. | none of above |
| Answer» B. electrode | |
| 91. |
In C₂H₄, the type of bonds present are |
| A. | covalent bonds only |
| B. | electrovalent bonds only |
| C. | dative covalent bonds only |
| D. | double covalent bonds only |
| Answer» E. | |
| 92. |
Hydrogen (H₂) is used for making |
| A. | margarine only |
| B. | ammonia only |
| C. | salts |
| D. | margarine and ammonia |
| Answer» E. | |
| 93. |
A suitable constant flow of electricity can be ensured through |
| A. | an ammeter |
| B. | a rheostat |
| C. | a voltmeter |
| D. | a galvanometer |
| Answer» C. a voltmeter | |
| 94. |
Common cutlery is manufactured through electrolysis of |
| A. | nickel |
| B. | galvanized zinc |
| C. | chromium |
| D. | copper |
| Answer» B. galvanized zinc | |
| 95. |
The composition of a standard hydrogen electrode is |
| A. | hydrogen gas |
| B. | H⁺ ions |
| C. | platinum electrode |
| D. | all of above |
| Answer» E. | |
| 96. |
An inorganic non-metallic solid prepared by heating a substance to a very high temperature is called |
| A. | molten |
| B. | ceramics |
| C. | pirate |
| D. | metal |
| Answer» C. pirate | |
| 97. |
If graphite (C) is used as electrode in presence of concentrated Hydrochloric Acid (HCl), at anode |
| A. | chlorine gas is produced |
| B. | oxygen gas is produced |
| C. | hydrogen gas is produced |
| D. | hydrogen chloride is produced |
| Answer» B. oxygen gas is produced | |
| 98. |
Oil is an example of |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | week insulator |
| Answer» C. weak electrolyte | |
| 99. |
The effect of pressure is in case of gases is similar to the effect of |
| A. | concentration |
| B. | molarities |
| C. | temperature |
| D. | humidity |
| Answer» B. molarities | |
| 100. |
Half-cell which is used to refer different electrode is standard |
| A. | carbon electrode |
| B. | hydrogen electrode |
| C. | copper electrode |
| D. | zinc electrode |
| Answer» C. copper electrode | |