MCQ
The reduction potential of hydrogen half cell will be positive if
- A$P_{H_2} = 2\,atm$; $[H^+] = 1.0\, M$
- B$P_{H_2} = 1\,atm$; $[H^+] = 1.0\, M$
- C$P_{H_2} = 4\,atm$; $[H^+] = 1.0\, M$
- ✓$P_{H_2} = 2\,atm$; $[H^+] = 2\, M$
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$(A)$ $NO _3^{-}$ $(B)$ $Cl ^{-}$ $(C)$ $SCN ^{-}$ $(D)$ $CN ^{-}$


$\begin{matrix}
CH-C{{O}_{2}}H \\
\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
CH-C{{O}_{2}}H \\
\end{matrix}\xrightarrow[(two\,mole)]{NaOH}(A)\xrightarrow{electrolysis}(B);$