sblock Elements 1 Question 28
28. A dilute aqueous solution of $\mathrm{Na}_2 \mathrm{SO}_4$ is electrolysed using platinum electrodes. The products at the anode and cathode are respectively
$(1996,1 M)$
(a) $\mathrm{O}_2, \mathrm{H}_2$
(b) $\mathrm{S}_2 \mathrm{O}_8^{2-}, \mathrm{Na}$
(c) $\mathrm{O}_2, \mathrm{Na}$
(d) $\mathrm{S}_2 \mathrm{O}_8^{2-}, \mathrm{H}_2$
Show Answer
Answer:
Correct Answer: 28. (a)
Solution:Electrolysis of aqueous $\mathrm{Na}_2 \mathrm{SO}_4$ gives $\mathrm{H}_2(\mathrm{~g})$ at cathode and $\mathrm{O}_2(\mathrm{~g})$ at anode.
BETA
