Assertion (A): Molality of solution does not change with change in temperature.
Reason (R): Molality is defined as no. of moles of solute per kg of solvent. Which of the following is correct?
Molality does not change with change in temperature, because it is defined as no.of.moles of solutewt.of solvent in kg . Neither no. of moles nor the wt. of solvent is changing with change in temperature. Hence (b) is the correct option.