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This mock test of Electrochemistry for Chemistry helps you for every Chemistry entrance exam.
This contains 20 Multiple Choice Questions for Chemistry Electrochemistry (mcq) to study with solutions a complete question bank.
The solved questions answers in this Electrochemistry quiz give you a good mix of easy questions and tough questions. Chemistry
students definitely take this Electrochemistry exercise for a better result in the exam. You can find other Electrochemistry extra questions,
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QUESTION: 1

For cell reaction will be spontaneous if:

Solution:

QUESTION: 2

Equivalent conductance of saturated BaSO_{4} is 400 ohm^{-1}cm^{2} equivalemt^{-1} and specific conductance is 8 x 10^{-5} ohm^{-1}cm^{-1}. Hence, k_{sp} of BaSO_{4} is:

Solution:

*Answer can only contain numeric values

QUESTION: 3

For a cell reaction, E (at 25^{o}C) = 1.26V, n = 2 and ΔS = -96.5JK^{-1}mol^{-1}. E at 85^{o}C by assuming ΔS to be independent of temperature is _____ (V). [Given F = 96500 Cmol^{-1}] (Round off to two decimal places).

Solution:

*Answer can only contain numeric values

QUESTION: 4

Given for the reaciton, for which ΔH^{o} = -3.0 kcal. The molar entropies are 6.5 cal/K for M, -22.2 cal/K for M^{+3}, 31.2 cal/k for H_{2} and -10.0cal/K for H^{+}.

The value of E^{o} for the half cell, is ______[Round off to two decimal places]

Solution:

QUESTION: 5

The resistance of decinormal solution of a salt occupying a volume between two platinum electrodes 1.80 cm apart and 5.4 cm^{2} area was found to be 32 ohm. The value of is

Solution:

QUESTION: 6

The value of

Given :

The required electrode reaction is

Solution:

QUESTION: 7

A current of 0.5A is passed through molten AlCl_{3} for 40 min. The mass of the aluminum deposited at the cathode is (Al = 27)

Solution:

QUESTION: 8

At 18^{0}C the mobilities of NH^{+}_{4} and ClO^{-}_{4} ions are 6.6 x 10^{-4} and 5.7 x 10^{-4} cm^{2} volt^{-1}s^{-1} at infinite dilution. The value of equivalent conductance of ammonium perchlorate solution at infinite dilution

Solution:

*Answer can only contain numeric values

QUESTION: 9

For the reaction,

H_{2}(g)(1atm) + 2AgCL(s) = 2Ag(s) + 2H^{+}(aq)(0.1M)+2Cl^{-}(aq)(0.1M)

The emf of the cell is _____volt.(Round off to two decimal placs)

Solution:

QUESTION: 10

The variation of equivalent conductance of strong electrolyte with is correctly shown in the figure

Solution:

With dilution λ_{eq }increases in a straight line for strong electrolyte.

QUESTION: 11

According to Debye Huckel limiting law the mean activity coefficient of 0.5 x 10^{-4} mol / kg CaCl_{2} is at 25^{o}C

Solution:

*Answer can only contain numeric values

QUESTION: 12

Given that, E_{0}(Fe^{3+},Fe) = -0.04V and E_{0}(Fe^{2+},Fe) = -0.44V, the value of E_{0}(Fe^{3+},Fe^{2+}) is _______ (in V). (round off to two decimal places).

Solution:

*Answer can only contain numeric values

QUESTION: 13

The solubility product of AgBr(s) is 5 x 10^{-13 }at 298k. If the standard reduction potential of the half cell The standard reduction potential (in volts) is _____ (round off to two decimal places).

Solution:

*Answer can only contain numeric values

QUESTION: 14

The concentration of a MgSO_{4} solution having the same ionic strength as that of a 0.1M Na_{2}SO_{4} solution is ____(Round off to three decimal places)

Solution:

QUESTION: 15

The temperature coefficient of the cell is Choose the incorrect statement(S)

Solution:

= 0 then |ΔH| > |nFE| endothermic reaction (Wrong relation)

QUESTION: 16

The standard electrode potential E^{o} at a fixed temperature and in a given medium is dependent on

Solution:

Depend only electrode reaction and electrode composition

QUESTION: 17

At 273K, the calorimetric determination of ΔH for the reaction,

Zn(s) + 2AgCl(s) → ZnCl_{2}(aq) + Ag(s)

yielded -217.78 kJ mol^{-1}, while the emf of the corresponding cell was 1.015 V. The of the cell is

Solution:

QUESTION: 18

The Zn^{2+}|Zn half cell (E^{θ} = -0.762V) is connected to a Cu^{2+} | Cu halff cell (E^{o} = 0.340V). The value of log_{10}K, where K is the equilibrium constant is [Given : (2.303 RT/F) = 0.06]

Solution:

QUESTION: 19

An electrochemical cell consists of two half-cell reactions

The mass of copper (in grams) dissolved on passing 0.5 A current for 1 hour is

[Given: atoms mass of Cu is 63.6; F = 96500C mol^{-1}]

Solution:

QUESTION: 20

According to the Dubye-Huckel limiting law, if the concendration of the dilute aqueous solution of KCI is increased 4-fold, the value of log is the molal mean ionic activity coefficient) will be

Solution:

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