Question

In Hydrogen electrode, the electrode is placed in a solution of ____ M Hcl. Fill in the blank.

(a) 0.5

(b) 1

(c) 2

(d) 3

The question was asked in exam.

The question is from Hydrogen and Glass Electrodes in division pH Meters and Ion Analysers of Analytical Instrumentation

Answer 1

Right option is (b) 1

To explain I would say: In Hydrogen electrode, the electrode is placed in a solution of 1M Hcl. H2 gas at 1 atm pressure is passed through the side arm in such a way that the platinum is half immersed in Hcl.