X _ ( Symmetrical , ,alkynes ) H g^ 2 + / H_3 O^ + ,2 ,butanone Which compound reacts with Ag powder to give X

$I.$ $CH_3 -CH = CH_2$ $\xrightarrow[{{\text{(CC}}{{\text{l}}_4}{\text{ )}}}]{{{\text{C}}{{\text{l}}_2}}}$ $\begin{array}{*{20}{c}}
{Cl\,\,}\\
{\,\,|\,\,\,\,\,}\\
{C{H_3} - CH - C{H_2}}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl}
\end{array}$

$II.$ $\begin{array}{*{20}{c}}
O\\
{||}\\
{C{H_3} - C - C{H_3}}
\end{array}$ $\xrightarrow[{{}^\Theta OH}]{{{\text{HCN}}}}$ $\begin{array}{*{20}{c}}
{\,\,\,\,\,OH}\\
|\\
{C{H_3} - C - C{H_3}}\\
|\\
{\,\,\,\,\,CN}
\end{array}$

$III.$ $CH_3-CH_2-CH_3$ $\xrightarrow[{hv}]{{C{l_2}}}$ $\begin{array}{*{20}{c}}
{Cl\,\,}\\
{|\,\,\,\,}\\
{C{H_3} - CH - C{H_3}}
\end{array}$

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How much amount of $\mathrm{NaCl}$ should be added to $600\; \mathrm{g}$ of water $(\rho=1.00\; \mathrm{g} / \mathrm{mL})$ to decrease the freezing point of water to $-0.2^{\circ} \mathrm{C} ?$ ............. $\mathrm{gm}$

(The freezing point depression constant for water $=2\; \mathrm{K}\; \mathrm{kg} \;\mathrm{mol}^{-1}$ )

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Which of the following is not considered as an organometallic compound.

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Methanol and ethanol are miscible in water due to

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Which of the following is not produced by human body?

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${image}$ The product $"A"$ in the above reaction is