Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): At 10°C, the density of a 5…

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : At $\displaystyle 10$°C, the density of a $\displaystyle 5$ M solution of KCl [atomic masses of K & Cl are $\displaystyle 39$ & $\displaystyle 35.5 \mathrm{~g} \mathrm{~mol}^{-1}$ respectively], is ' $\displaystyle x$ ' $\displaystyle \mathrm{g} \mathrm{ml}^{-1}$. The solution is cooled to -$\displaystyle 21$°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.