MCQ
The electronic configuration of central atom of complex $[MnO_4]^{2-}$ is
- A$t_2^1\,{e^0}$
- B$t_2^0\,{e^0}$
- C${e^0}\,t_2^0$
- ✓${e^1}\,t_2^0$
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$(ii)$ $CH _{3} COOH$
$(iii) $ $C _{6} H _{5} COOH$
$(iv)$ $CH _{3} CH _{2} COOH$
Correct order of $pK _{ a }$ value is :
$Ca\left( s \right)|C{a^{ + 2}}_{\left( {aq.} \right)}||F{e^{ + 2}}_{\left( {aq} \right)}|Fe\left( s \right)$
$E_{C{a^{ + 2}}/Ca}^o = - 2.87\,V$ ; $E_{Fe/F{e^{ + 2}}}^o = 0.41\,V$
