Electrochemistry MCQ Practice Sheet 1

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Chemistry MCQs for JEE-Main, Electrochemistry MCQ Practice Sheet 1 20 MCQ with Answer Keys. All MCQs are taken from previous papers of IIT-JEE and NEET.

1. Faraday’s laws of electrolysis are related to the

  • (a)    Atomic number of the cation
  • (b)    Atomic number of the anion
  • (c)    Equivalent weight of the electrolyte
  • (d)    Speed of the cation

2. The electric charge for electrode deposition of one gram equivalent of a substance is [1986]

  • (a)    One ampere per second
  • (b)    96.500 coulombs per second
  • (c)    One on one mole of electrons
  • (d)    Charge on one mole of electrons

3. When a lead storage battery is discharged

  • (a)    SO2
  • (b)    Lead is formed
  • (c)    Lead sulphate is consumed
  • (d)    Sulphuric acid is consumed

4. The standard reduction potentials of Cu2+/Cu and Cu2+ / Cu+ are 0.337 V and 0.153 V respectively. The standard electrode potential of Cu+/Cu half-cell is [1997]

  • (a)    0.184 V
  • (b)    0.827 V
  • (c)    0.521 V
  • (d)    0.490 V

5. The standard reduction potential values of three metallic cations, X, Y, Z are 0.52, –3.03 and –1.18 V respectively The order of reducing power of the corresponding metals is [1998]

  • (a)    Y > Z > X
  • (b)    X > Y > Z
  • (c)    Z > Y > X
  • (d)    Z > X > Y

6. The gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y and 1 M Z at 25°C. If the order of reduction potential is Z < Y > X, then  [1999]

  • (a)    Y will oxidize X and not Z
  • (b)    Y will oxidize Z and not X
  • (c)    Y will oxidize both X and Z
  • (d)    Y will reduce both X and Z

7. The correct order of equivalent conductance at infinite dilution of LiCl, NaCl and KCl is  [2001]

  • (a)    LiCl > NaCl > KCl
  • (b)    KCl > NaCl > LiCl
  • (c)    NaCl > KCl > LiCl
  • (d)    LiCl > KCl > NaCl

8. Saturated solution of KNO3is used to make ‘salt-bride’ because  [2001]

  • (a)    Velocity of K+ is greater than that of NO3
  • (b)    Velocity of NO3– is greater than that of K+
  •  (c)    Velocities of both NO3– and K+ are nearly the same
  • (d)    KNO3  is highly soluble in water

9. In the electrolytic cell, flow of electrons if from [2003]

  • (a)    Cathode to anode in solution
  • (b)    Cathode to anode through external supply
  • (c)    Cathode to anode through internal supply
  • (d)    Anode to cathode through internal supply

10. Zn | Zn2+ (a = 0.1 M) || Fe2+ (a = 0.01 M) || Fe. The emf of the above cell is 0.2905 V. Equilibrium constant for the cell reaction is [2004]

  • (a)    100.32/0.059
  • (b)    100.32/0.0295
  • (c)    100.26/0.0295
  • (d)    100.32/0.295

11. Electrolysis of dilute aqueous NaCl solution was carried out by passing 10 mA current. The time required to liberate 0.01 mole of H2 gas at the cathode is [2008]

  • (a)    9.65 × 104
  • (b)    19.3 × 104
  • (c)    28.95 × 104 s
  • (d)    38.6 × 104 s
  1. The cell constant of a conductivity cell
  • Changes with a change of concentration of electrolyte
  • Remains constant for a cell
  • changes with a change of electrolyte
  • changes with change in temperature
  1. The aqueous solution of which of the following compounds is the best conductor of electric current?
  •  Acetic acid,
  • Hydrochloric acid
  • Ammonia
  • Fructose
  1. An increase in the conductivity equivalent of a solid electrolyte with dilution is primarily due to
  • increased ionic mobility of ions
  • 100 percent electrolyte ionisation with natural dilution
  • increase in both ion numbers and ionic mobility
  • A rise in ion counts
  1. The equivalent conductance of Ba2+and Clare respectively 127 and 76 ohm-1 cm-1 eq-1 at infinite dilution. The equivalent conductance of BaCl2 at infinite dilution will be
  • 39.5
  • 203
  • 279
  • 101.5
  1. When heating one end of a metal plate, the other end gets hot because of
  • the resistance of the metal
  • mobility of atoms in the metal
  • energised electrons moving to the other end
  • minor perturbation in the energy of atoms.
  1. The weight of silver displaced by a quantity of electricity which displaces 5600ml of O2at STP will be
  • 5.4g
  • 10.8g
  • 54.9g
  • 108.0g
  1. Once a current of 1.0 ampere was passed through one litre of CuCl2solution for 16 min and 5 sec, all of the solution’s copper was deposited at the cathode. The strength of solution CuCl2was (Molar mass of Cu = 63.5; Faraday constant = 96,500 C/mol)
  • 0.01N
  • 0.01M
  • 0.02M
  • 0.2N
  1. On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be
  • hydrogen
  • oxygen
  • hydrogen sulphide
  • sulphur dioxide
  1. A device that converts the energy of combustion of fields like hydrogen and methane directly into electrical energy is known as
  • Electrolytic cell
  • Dynamo
  • Ni-Cd cell
  • Fuel cell

 

Chemistry MCQs for JEE-MAin | Electrochemistry MCQ Practice Sheet Answer keys:

1.    c    2.    d    3.    d    4.    c    5.    a

6.    a    7.    b    8.    c    9.    c    10.    b

11.    b    12.    b    13.    b    14.    a    15.    a

16.    c    17.    d     18.    a    19.    b    20.    d

MCQ on Electrochemistry for NEET 2021, Electrochemistry MCQs for NEET, Electrochemistry for NEET and JEE Main, Electrochemistry MCQs with Answers, Electrochemistry Class 12, Question Bank for NEET Chemistry Electrochemistry, MCQ on Electrochemistry for NEET 2022, MCQ on Electrochemistry for NEET 2023, MCQs on Electrochemistry


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