Redox Reactions And Electrochemistry Ques 717

Question: The reduction potential of hydrogen half-cell will be negative if

Options:

A) p(H2)=2,atm,and,[H+]=2.0M

B) p(H2)=1,atm,and,[H+]=2.0M

C) p(H2)=1,atm,and,[H+]=1.0M

D) p(H2)=2,atm,and,[H+]=1.0M

Show Answer

Answer:

Correct Answer: D

Solution:

[d] For H+(aq)+e(1/2)H2(g), we have E=RTFln(pH2/atm)1/2([H+]/M) For E to be negative, the ratio (pH2/atm)1/2([H+]/M) should be greater than 1. Only the choice ([d] produces this result.



NCERT Chapter Video Solution

Dual Pane