Question
The reduction potential of hydrogen half-cell will be negative if
-
p(H2) = 1 atm and [H+] = 2.0 M
-
p(H2) = 1 atm and [H+] = 1.0 M
-
p(H2) = 2 atm and [H+] = 1.0 M
-
p(H2) = 2 atm and [H+] = 2.0 M
Solution
C.
p(H2) = 2 atm and [H+] = 1.0 M

Thus correct answer is c.