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Electrochemistry question

2002 · Q98
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Electrochemistry question

2002 · Q98

NEETChemistryElectrochemistryMCQ+4 / −1
In electrolysis of NaCl when Pt electrode is taken then H2 is liberated at cathode while with Hg cathode it forms sodium amalgam
  1. A
    Hg is more inert than Pt
  2. B
    More voltage is required to reduce H+ at Hg than at Pt
  3. C
    Na is dissolved in Hg while it does not dissolve in Pt
  4. D
    Conc. of H+ ions is larger when Pt electrode is taken.
View written solutionFree

Correct answer: B

In electrolysis of NaCl when Pt electrode is taken then H2 liberated at cathode while with Hg cathode it forms sodium amalgam because more voltage is required to reduce H+ at Hg than Pt.

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