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यदि अर्ध सेल अभिक्रियाओं को निम्न प्रकार...

यदि अर्ध सेल अभिक्रियाओं को निम्न प्रकार दिया जाता है:
(i) `Fe^(2+)+2e^(-)toFe(s),E^(@)=-0.44V`
(ii) `2H^(+)(aq)+O_(2)(g)+2etoH_(2)O(l),E^(@)=+1.23V`
अभिक्रिया के लिए `E^(@)` है:
`Fe(s)+2H^(+)+O_(2)(g)toFe^(2+)(aq)+H_(2)O(l)`

A

`-0.79V`

B

`-1.67 V`

C

1.67 V

D

0.79 V

Text Solution

Verified by Experts

The correct Answer is:
C
समीकरण (i) को (ii) से घटाने पर हमें निम्नानुसार समीकरण (iii) प्राप्त होता है
`Fe(s)+2H^(+)+(1)/(2)O_(2)toFe^(2+)(aq)......+H_(2)O(l)`
(iii) इसलिए,
`E^(@)=E_(2)^(@)-E_(1)^(@)=+1.23-(-0.44)=+1.67V`
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