JEE Exam > JEE Questions > In electrolysis of NaCl with Pt electrode is ...
Start Learning for Free
In electrolysis of NaCl with Pt electrode is taken the H₂ is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this is
- a)Hg is more inert than Pt
- b)more voltage is required to reduce H⁺ at Hg than at Pt
- c)Na is dissolved in Hg while it does not dissolve in Pt
- d)concentration of H⁺ ions is larger when Pt electrode is taken
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In electrolysis of NaCl with Pt electrode is taken the H is liberated ...
Explanation:
Electrolysis of NaCl involves the reduction of sodium ions and the oxidation of chloride ions. The reduction of sodium ions occurs at the cathode, while the oxidation of chloride ions occurs at the anode.
When a Pt electrode is taken as a cathode, hydrogen ions (H+) are reduced to hydrogen gas (H2) at the cathode. However, when a Hg electrode is used as a cathode, sodium ions (Na+) are reduced to form sodium amalgam (NaHg), instead of hydrogen gas.
The reason for this difference is the relative reactivity of the two cathode materials. Hg is more inert than Pt, meaning that it is less likely to participate in chemical reactions. As a result, it requires more voltage to reduce H+ ions to hydrogen gas at the Hg cathode than it does at the Pt cathode.
This is due to the fact that the reduction potential of H+ ions is higher than the reduction potential of Na+ ions. Therefore, to reduce H+ ions to hydrogen gas, a higher voltage is required than to reduce Na+ ions to sodium amalgam.
In summary, the reason that Hg forms sodium amalgam instead of liberating hydrogen gas in the electrolysis of NaCl is due to the relative reactivity of the two cathode materials. Hg is more inert than Pt and requires more voltage to reduce H+ ions to hydrogen gas, making it more favorable to reduce Na+ ions to form sodium amalgam instead.
Electrolysis of NaCl involves the reduction of sodium ions and the oxidation of chloride ions. The reduction of sodium ions occurs at the cathode, while the oxidation of chloride ions occurs at the anode.
When a Pt electrode is taken as a cathode, hydrogen ions (H+) are reduced to hydrogen gas (H2) at the cathode. However, when a Hg electrode is used as a cathode, sodium ions (Na+) are reduced to form sodium amalgam (NaHg), instead of hydrogen gas.
The reason for this difference is the relative reactivity of the two cathode materials. Hg is more inert than Pt, meaning that it is less likely to participate in chemical reactions. As a result, it requires more voltage to reduce H+ ions to hydrogen gas at the Hg cathode than it does at the Pt cathode.
This is due to the fact that the reduction potential of H+ ions is higher than the reduction potential of Na+ ions. Therefore, to reduce H+ ions to hydrogen gas, a higher voltage is required than to reduce Na+ ions to sodium amalgam.
In summary, the reason that Hg forms sodium amalgam instead of liberating hydrogen gas in the electrolysis of NaCl is due to the relative reactivity of the two cathode materials. Hg is more inert than Pt and requires more voltage to reduce H+ ions to hydrogen gas, making it more favorable to reduce Na+ ions to form sodium amalgam instead.
|
Explore Courses for JEE exam
|
|
Similar JEE Doubts
Top Courses for JEEView all
In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer?
Question Description
In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer?.
In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer?.
Solutions for In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In electrolysis of NaCl with Pt electrode is taken the H is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this isa)Hg is more inert than Ptb)more voltage is required to reduce H at Hg than at Ptc)Na is dissolved in Hg while it does not dissolve in Ptd)concentration of H ions is larger when Pt electrode is takenCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice JEE tests.
|
|
Explore Courses for JEE exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup