MCQ
The tendency towards complex formation is maximum in
- A$s -$ block elements
- B$p -$ block elements
- ✓$d - $ block elements
- D$f -$ block elements
$(i)$ Small atomic size
$(ii)$ High nuclear charge
$(iii)$ Presence of vacant $d-$ orbitals
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$Cu_{(s)} + 2Ag^+_{(aq)} \rightarrow Cu^{2+}_{(aq)} + 2Ag_{(s)}\,;$
$E^o = 0.46\, V$ at $298\, K$ is
| $M^{x+}\, (aq)\,/M(s)$ |
$A{u^{3 + }}(aq)/$ $Au(s)$ |
$A{g^ + }(aq)/$ $Ag(s)$ |
$F{e^{3 + }}(aq)/$ $F{e^{2 + }}(aq)$ |
$F{e^{2 + }}(aq)/$ $Fe(s)$ |
| $E^o\,M^{x+}$ $\,/M(V)$ | $1.40$ | $0.80$ | $0.77$ | $-0.44$ |
If $E_{Z{n^{2 + }}/Zn}^o = - 0.76\,V,$ which cathode will given a maximum value of $E_{cell}^o$ per electron transferred?
$\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,OH} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,} \\
{C{H_3} - CH = CH - C{H_2} - CH - C{H_3}}
\end{array}$ $\longrightarrow $ $C{H_3} - CH = CH - C{H_2}C{O_2}H$