AIPMT PRELIMS 2002 Chemistry Electrolysis MCQ Question
In electrolysis of NaCl when Pt electrode is taken then H₂ is liberated at cathode while with Hg cathode it forms sodium amalgam :-
Hg is more inert than Pt
More voltage is required to reduce H⁺ at Hg than at Pt
Na is dissolved in Hg while it does not dissolve in Pt
Conc. of H⁺ ions is larger when Pt electrode is taken
Correct Answer
Detailed Explanation
Na forms an amalgam with Hg due to its solubility in mercury, whereas it does not dissolve in platinum.
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