MCQ
The electrons are more likely to be found


- Ain the region $a$ and $b$
- ✓in the region $a$ and $c$
- Conly in the region $a$
- Donly in the region $c$


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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
The compound $A$ is a above reaction is