Published by:
CGP EDU Academic Team
Published on: August 13, 2026
In an electrochemical reaction of lead, at standard temperature, if 
= m Volt and 
= n Volt, then the value of E° Pb 2+ /Pb 4+ ) is given by m - xn. The value of x is_______. (Nearest integer)
Text Solution
Verified by ExpertsThe correct answer is:
2
(2) The relation between Gibbs Free energy and emf of the cell can be related as follows,
The electrode reactions can be written as follows,
Pb 2+ + 2e - 
Pb 
Pb 4+ + 4e - 
Pb 
Pb 4+ + 2e - 
Pb 2+ 
Now, 
Hence, the value of x = 2
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