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03/10/2020 5:43 pm
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The products formed when an aqueous solution of NaBr is electrolysed in a cell having inert electrodes are:
(a) Na and Br2
(b) Na and O2
(c) H2, Br2 and NaOH
(d) H2 and O2
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03/10/2020 5:50 pm
(c) H2, Br2 and NaOH
Explanation:
NaBr ⇌ Na+ + Br-
At cathode: 2H2O + 2e → H2 + OH-
At cathode: Na+ + OH- → NaOH
Br- → Br + e-
At anode: Br + Br → Br2
So the products are H2 and NaOH (at cathode) and Br2 (at anode)