MCQ
In the above reaction $o/p$ ratio will be highest when
- ✓$R = - CH_3$
- B$R = - CH_2 -CH_3$
- C$R = - CHMe_2$
- D$R = - CMe_3$
Increase in size of $Y$ $\begin{gathered}
\downarrow \hfill \\
\downarrow \hfill \\
\downarrow \hfill \\
\downarrow \hfill \\
\downarrow \hfill \\
\end{gathered} $ $\begin{array}{*{20}{c}}
Y&{\% \,\,o - }&{\% \,p\, - } \\
{C{H_3}}&{58}&{37} \\
{C{H_2}Me}&{45}&{49} \\
{CHM{e_2}}&{30}&{62} \\
{CM{e_3}}&{16}&{73}
\end{array}$
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$l$ $m$
Assertion $(A) :$ At $10^{\circ} C$, the density of a $5\, M$ solution of $KCl$ [atomic masses of $K$ and $Cl$ are $39$ and $35.5\, g \,mol ^{-1}$ ]. The solution is cooled to $-21^{\circ} C$. The molality of the solution will remain unchanged.
Reason $(R):$ The molality of a solution does not change with temperature as mass remains unaffected with temperature.
In the light of the above statements, choose the correct answer from the options given below