Q.Assertion (A): The molality of a solution does not change with change in temperature. \nReason (R): Molality is expressed in units of moles per $1000 \text{ g}$ of solvent, and mass is independent of temperature.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false but R is true

The correct solution involves applying the fundamental concept to derive the final value step by step...

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Q.Assertion (A): The molality of a solution does not change with change in temperature. \nReason (R): Molality is expressed in units of moles per 1000 g1000 \text{ g}1000 g of solvent, and mass is independent of temperature.