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E("cell")^(@) for some half - cell react...

`E_("cell")^(@)` for some half - cell reactions are given below. On the basis of these mark the correct answer -
(a) `H^(+)(aq)+e rarr (1)/(2)H_(2)(g), E_("cell")^(@)=0.00V`
(b) `2H_(2)O(l) rarr O_(2)(g)+4H^(+)(aq)+4e , E_("cell")^(@)=+1.23V`
(c) `2SO_(4)^(2-)(aq) rarr S_(2)O_(8)^(2-)(aq)+2e , E_("cell")^(@)=+1.96V`

A

in dilute `H_(2)SO_(4)` solution, hydrogen will be reduced at cathode

B

in cocentrated `H_(2)SO_(4)` solution, water will be oxidised at anode

C

in dilute `H_(2)SO_(4)` solution, water will be oxidised at anode

D

in dilute `H_(2)SO_(4)` solution, `SO_(4)^(2-)` ion will be oxidised to tetrahionate ion at anode

Text Solution

Verified by Experts

The correct Answer is:
A, C
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