High purity (> 99.95%) dihydrogen is obtained by
High purity (> 99.95%) dihydrogen is obtained by
Option 1 - <p>Reaction of zinc aqueous alkali.</p>
Option 2 - <p>Electrolysis of acidified water using platinum electrodes.</p>
Option 3 - <p>Electrolysis of warm aqueous barium hydroxide solution between nickel electrodes.</p>
Option 4 - <p>Reaction of zinc with dilute acid.</p>
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Correct Option - 3
Detailed Solution:
High purity (> 99.95%) H2 gas is obtained by electrolysis of warm aqueous Ba (OH)2 solution using Ni electrode.
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H2S has minimum boiling point.
PbS + 4H2O2->PbSO4 + 4H2O.
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Compound Melting Point (K)
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Chemistry NCERT Exemplar Solutions Class 12th Chapter Two 2025
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