MCQ
Copper sulphate solution reacts with $KCN$ to give
- A$Cu{(CN)_2}$
- B$CuCN$
- C${K_2}[Cu{(CN)_4}]$
- ✓${K_3}[Cu{(CN)_4}]$
$2Cu{(CN)_2} \to C{u_2}{(CN)_2} + {(CN)_2}$
$C{u_2}{(CN)_2} + 6KCN \to 2{K_3}[Cu{(CN)_4}]$
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| Column $-I$ (various solutions) | Column $-II$ (Their freezing point ) | ||
| $a$ | $0.1\,M\, BaCl_2$ solution | $p$ | $271\,K$ |
| $b$ | $0.1\,M\, NaCl$ solution | $q$ | $270\, K$ |
| $c$ | $0.1\,M\, K_3 [Fe(CN)_6]$ solution | $r$ | $268\, K$ |
| $d$ | $0.1\,M\, Al_2 (SO_4)_3$ solution | $s$ | $269\, K$ |
Given : Freezing point of $0.1\,M$ sucrose solution $= 272\,K$ and $F.pt.$ of water $= 273\,K$
Which of the following option show correct matches ? (assume, molarity=molality)
$\begin{array}{*{20}{c}}
{R = - CH - Cl}\\
{|\,\,}\\
{\,\,\,\,C{H_3}}
\end{array}\,\,\,\,,\,\,\,\,\,\,\,\,\,\,\begin{array}{*{20}{c}}
{S = - CH - Cl}\\
{|\,\,}\\
{Br}
\end{array}$