Q. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : At , the density of a solution of [atomic masses of and are & . The solution is cooled to . 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:

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Solution:

Molality is independent of temperature and hence both assertion and reason are true.