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When an electrode reaction is obtained by adding/subtracting two electrode reactions, then reduction potential of the net reaction is not necessarily obtained by addition/subtraction of the two reduction potentials. This type of problem is solved by Gibbs free energy addition/subtraction.

It is the process of determining various constituents in a gaseous mixture by using an instrument called Eudiometer.

Even Function: If a function f is such that f(-x)=f(x), then the function f is called even function.

Odd Function: If a function f is such that f(-x)=-f(x), then the function f is called odd function.