One faraday of electricicy is passed through aqueous solution of sodium chloride. It produces
One faraday of electricicy is passed through aqueous solution of sodium chloride. It produces
A. one mole of oxygen at anode
B. 1 gm of hydrogen at cathode
C. neither hydrogen nor oxygen is produced
D. sodium is deposited at cathode in equivalent proportion.
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Correct Answer - B
`NaCl + aq to Na^(+) (aq) + Cl^(-) (aq)`
`H_(2)O to H^(+) + OH^(-)`
At cathode : `H^(+) + e^(-) to (1)/(2) H_(2)`
1 F liberates 1 g eq.of `H_(2)` gas , i.e., 1 g of `H_(2)` at cathode .
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