# Integer Type Questions of Chapter Electrochemistry for JEE Chemistry

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Here we are providing integer type questions for class 12 chemistry chapter 3 electrochemistry. These questions are useful for students preparing for various engineering entrance examinations. It is specially prepared for JEE aspirants.

## Integer Type Questions Based on Chapter Electrochemistry

DIRECTIONS. The answer to each of the following questions is a single digit integer, ranging from 0 to 9.

Q.1.   0.25 mole of propane is subjected to combustion. If this reaction is used for making a fuel cell, the number of moles of electrons involved in each half cell for this amount of propane will be

Ans. 5

Q.2.   Three litres of 0.5 M K2Cr2O7 solution have to be completely ‘reduced in the acidic medium. The number of faradays of electricity required will be ______________

Ans. 9

Q.3.   All the enemy released from the reaction X → Y, ΔrG° = – 193 kJ mol–1 is used for oxidizing M+ as M+→ M3+ + 2 e, E° = – 0.25 V. Under standard conditions, the number of moles of M+ oxidized when one mole of X is converted to Y is (F = 96500 C mol–1)

Ans. 4

Q.4.   In the Mg–Al cell, the number of electrons involved in the cell reaction is _________

Ans. 6

Q.5.   The equilibrium constant for the following reaction at 298 K is expressed as x x 10y

2 Fe3+ + 2 I→ 2 Fe2+ + I2, E°cell = 0.235 V

The value of y is

Ans. 7

Q.6.   For the Mg–Ag cell, how many times the difference between the EMF of the cell and its standard EMF will change if concentration of Mg2+ ions is changed from 0.1 M to 0.01 M and that of Ag+ ions is changed from 0.5 M to 0.25 M?

Ans. 2

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