Q.
Aqueous solution of NaCl is subjected to electrolysis using inert electrodes. Weight of the substance obtained at cathode by passing 965 amperes of current for 10 seconds will be
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a
2.3 g
b
1.15 g
c
0.1 g
d
0.05 g
answer is C.
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Detailed Solution
Discharge potential of H+ is lesser than that of Na+ (or) SRP value of H+/12H2 is higher than Na+/Na. Hydrogen is liberated at cathode.q= it; q=965amp×10s=9650C; 96500C liberates 1 gGEW of hydrogen at cathode; 9650C liberates 0.1 g of hydrogen at cathode;
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