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Question

Choose the correct answer from the options given below:
When fused lead bromide is electrolyzed we observe:


A

a silver-grey deposit at anode and a reddish brown deposit at cathode

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B

a silver-grey deposit at cathode and a reddish brown deposit at anode

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C

a silver-grey deposit at cathode and reddish brown fumes at anode

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D

silver grey fumes at anode and reddish brown fumes at cathode

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Solution

The correct option is C

a silver-grey deposit at cathode and reddish brown fumes at anode


  • Electrolysis is the process of breaking a compound in its molten form into its substituents by passing electricity through it.

Explanation for the correct option:

(c)a silver-grey deposit at cathode and reddish-brown fumes at anode

During the electrolysis of fused Lead Bromide, the silver-grey-colored substance is deposited at the cathode and reddish-brown fumes come out from the anode.


Explanation for the incorrect option:

(a) a silver-grey deposit at anode and a reddish-brown deposit at cathode

During the electrolysis, a silver-grey-colored substance gets deposited at the cathode. So this is the incorrect option.

(b) a silver-grey deposit at cathode and a reddish-brown deposit at anode

During the electrolysis, reddish-brown fumes comes out from the anode. So this is the incorrect option.

(d) silver grey fumes at the anode and reddish-brown fumes at the cathode

A silver-grey substance gets deposited during the process of electrolysis. So, this is the incorrect option.


When fused lead bromide is electrolyzed we observe a silver-grey deposit at the cathode and reddish-brown fumes at the anode.


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