wiz-icon
MyQuestionIcon
MyQuestionIcon
20
You visited us 20 times! Enjoying our articles? Unlock Full Access!
Question

Given are the reactions occuring during the electrolysis of sodium chloride solution:

2ClCl2+2e
2H2O+2eH2+2OH

Which of the following is correct regarding liberation of electrolytic products?


A
Cathode : Na and H2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Cathode : Na and O2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Anode: O2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Anode : Cl2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D Anode : Cl2
Water plays a vital role during the electrolysis of NaCl solution. Since water can be both oxidized and reduced, it competes with the dissolved Na+ and Cl ions.

Having a greater tendency to get reduced than sodium ions, water gets reduced and produces hydrogen. Reduction takes place at cathode and hydrogen gas is evolved at the cathode.

Similarly, Cl has a greater tendency than water to get oxidised so it gets oxidised and produces chlorine gas. Oxidation takes place at anode and chlorine gas will be produced at the anode. The reactions taking place during electrolysis of NaCl solution are:

At cathode: H2O(l)+2eH2(g)+2OH

At anode: 2ClCl2(g)+2e


flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electrolysis of Aqueous Sodium Chloride
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon