MCQ
If the valency shell electronic structure for an element is $n{s^2}n{p^5}$, this element will belong to the group of
- AAlkali metals
- BInert metals
- CNoble gases
- ✓Halogens
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$\mathrm{Cu}_{(\mathrm{s})}+2 \mathrm{Ag}^{+}\left(1 \times 10^{-3} \,\mathrm{M}\right) \rightarrow \mathrm{Cu}^{2+}(0.250\, \mathrm{M})+2 \mathrm{Ag}_{(\mathrm{s})}$
$\mathrm{E}_{\mathrm{Cell}}^{\ominus}=2.97\, \mathrm{~V}$
$\mathrm{E}_{\text {cell }}$ for the above reaction is $....\,V.$ (Nearest integer)
[Given : $\log 2.5=0.3979, T=298\, \mathrm{~K}]$

$R-Cl\xrightarrow{(i)\,\,KCN,(ii)\,LiAl{{H}_{4}}} $ Product $A$
$R-Cl\xrightarrow{(i)\,\,AgCN,(ii)\,LiAl{{H}_{4}}} $ Product $B $
the compounds $A$ and $B$ are
$XeO _{3}, XeO _{2} F _{2}, XeO _{4}, XeO _{3} F _{2}, Ba _{2} XeF _{4}$