Name the ions present and the products formed at the electrodes (cathode and anode) during electrolysis of:
(i) Molten lead bromide

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Solution

In the molten state, lead bromide undergoes electrolytic dissociation, but in the solid form, it is a non-electrolyte.
Lead ions $({Pb}^{2 +})$ and bromide ions $({Br}^{-})$ .
Lead $(Pb)$ is produced at cathode and bromine $({Br}_{2})$ is produced at anode.

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(a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.

(b) During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes. Give reason.

Q. Choose the correct answer:
During the electrolysis of molten lead bromide, which of the following takes place?
(a) Bromine is released at the cathode
(b) Lead is deposited at the anode
(c) Bromine ions gain electrons
(d) Lead is deposited at the cathode

(a) Here is an electrode reaction :

$C u \to C u^{2 +} + 2 e^{-}$ . At which electrode (anode or cathode) would such a reaction take place? Is this an example of oxidation or reduction ?

(b) A solution contains magnesium ions $(M g^{2 +})$ , iron (II) ions $F e^{2 +}$ and copper ions $C u^{2 +}$ . On passing an electric current through this solution, which ions will be the first to be discharged at the cathode? Write the equation for the cathode reaction.

(d) During the electrolysis of molten lead bromide, which of the following takes place ?

A. Bromine is released at the cathode,

B. Lead is deposited at the anode,

C. Bromine ions gain electrons,

D. Lead is deposited at the cathode.

Q. State the observations at the anode and at the cathode during the electrolysis of:
Fused lead bromide using graphite electrodes.

Q. Match the following based on the products formed at cathode and anode during the electrolysis of NaCl.

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Name the ions present and the products formed at the electrodes (cathode and anode) during electrolysis of:(i) Molten lead bromide

In the molten state, lead bromide undergoes electrolytic dissociation, but in the solid form, it is a non-electrolyte.Lead ions Pb2+ and bromide ions Br-. Lead(Pb) is produced at cathode and bromineBr2 is produced at anode.

Name the ions present and the products formed at the electrodes (cathode and anode) during electrolysis of:
(i) Molten lead bromide

In the molten state, lead bromide undergoes electrolytic dissociation, but in the solid form, it is a non-electrolyte.
Lead ions $({Pb}^{2 +})$ and bromide ions $({Br}^{-})$ .
Lead $(Pb)$ is produced at cathode and bromine $({Br}_{2})$ is produced at anode.