MCQ
Amongst the following alcohols which would react fastest with conc. $HCl$ and $ZnCl_2$ ?
- Apentanol
- B$2-$ methyl butanol
- C$2-$ pentanol
- ✓$2-$ methyl butan $-2-$ ol
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$\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right]^{2+}, \quad\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-} \text {, }$
$(A)$ $(B)$
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}, \quad\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_4\right]^{2+}$
$(C)$ $(D)$
The correct order of $A$, $B$, $C$ and $D$ in terms of wavenumber of light absorbed is :

$\mathop {Ca{C_2}}\limits_{\left( A \right)} \xrightarrow{{{H_2}O}}B\xrightarrow[{HgS{O_4}}]{{{H_2}O,{H_2}S{O_4}}}C$