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Question

Choose the correct option regarding chlor-alkali process:

A
Brine solution decomposes on the application of electricity.
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B
Cl2 is given off at the cathode.
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C
H2 is given off at the anode.
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D
All of the above.
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Solution

The correct option is A Brine solution decomposes on the application of electricity.
The reaction for Chloralkali process is given as :
2NaCl+2H2O2NaOH+Cl2+H2

The reaction occurring at Anode is given as :
Cl(aq)12Cl2+e

while, the reaction taking place at cathode is given as :
Na+(aq)+eNa/HgNa/Hg+H2ONaOH+12H2

So, chlor-alkali process is used to produce chlorine and sodium hydroxide (caustic soda) by the decomposition of brine solution with the application of electricity.

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