Question

The observation seen when fused lead bromide is electrolysed is: A: a silver grey deposit at anode and a reddish brown deposit at cathode. B: a silver grey deposit at cathode and a reddish brown deposit at anode. C: a silver grey deposit at cathode and reddish brown fumes at anode. D: silver grey fumes at anode and reddish brown fumes at cathode​

Answer 1

Answer:

Option c is correct

Explanation:

During the electrolysis of lead bromide, Graphite being inert electrode is used as both anode and cathode. Lead bromide dissociates to form Pb

2+

ions are discharged at the cathode as neutral lead atoms by accepting electrons whereas Br

−

ions are discharged at the anode as neutral bromine atoms by giving up electrons.

Hence, a silver-grey deposit of lead is obtained at the cathode and reddish-brown fumes of bromine are obtained at the anode.

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