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Statement : Pt(H(2))|HCl at 25^(@)C E(H...

Statement : `Pt_(H_(2))|HCl ` at `25^(@)C E_(H) = 0`.
Explanation : For primary reference electrode `E_(H//H^(+))^(@) = 0`

A

S is correct but E is wrong

B

S is wrong but E is corrent

C

Both S and E are correct and E is corrent explanation of S.

D

Both S and E are correct but E is not correct explanation of S

Text Solution

Verified by Experts

The correct Answer is:
B
Primary reference electrode is
`underset("1 atm")(Pt_(H_(2)))//underset(1M)(HCl)" " at 25^(@)"C its",E^(@)=0`
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The cell designed as Pt_(H_(2))|HCl_(aq)||Hg_(2)Cl_(2),0.01 N KCl|Hg has emf of 0.271 V at 298 K and 0.2669 at 308 K . The E_(H_(2)^(2+)//Hg) is 0.260 V The heat of reaction for redox change is:

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