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Grade 12Physical Chemistry

A solution of Na2SO4 in water is electrolysed using inert electrodes. The product at cathode and anode are respectively

(a) H2, O2

(b) O2, H2

(c) O2, Na

(d) O2, SO2

choose and explain

Profile image of pratiksha agarwal
13 Years agoGrade 12
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2 Answers

Profile image of Roshan Mohanty
ApprovedApproved Tutor Answer13 Years ago

H +  + 2 e -  --->  2H2                  Cathode because it is a reduction reaction.

2H2O  -->  O2  +  4e -  +  4H +     Anode because it is an oxidation reaction.


so ans is A

Profile image of Vikas TU
13 Years ago

Na2+ + 2e'' -> Na (Anode)

2SO4 2- -> 2SO3 + O2 + 4e'' (Cathode)

The answer is C.

 

plz approve!