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