Q.44: Durin electrolysis of aqueous CuSO4 using
copper electrodes , there is competition among OH-
,
SO4
2-
and copper electrode to get oxidise at anode :
(i) Cu - Cu2+
+ 2 e-
; E0
Cu2+/Cu = + 0.34 V
(ii) 2 H2O (l) - O2(g) + 4 H+
(aq) + 4 e-
; E
0
red = +1.23 V
(iii) 2 SO4
2-
- S2O8
2-
+ 2 e- ; E0
red = +2.05 V
Which reaction will be preffered on anode :
(a) (i) (b) (ii) (c) (iii) (d) none of thes
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Answer:
घर में गैस खत्म होने के बाद
इमरजेंसी में भी रोटियां
पकाई जा सकती है
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