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? Options: A . &nbspBoth A and R are true and R is correct explanation of A B . &nbspBoth A and R are true and R is not a correct explanation of A C . &nbspA is true but R is false. D . &nbspA is false but R is true.

Assertion (A): Molality of solution does not change with change in temperature.

Question

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?

Options:

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

B . Both A and R are true and R is not a correct explanation of A

C . A is true but R is false.

D . A is false but R is true.

Answer: Option B
:
B
Molalitydoesnotchange with change in temperature, because it is defined as

\frac{n o . o f . m o l e s o f s o l u t e}{w t . o f s o l v e n t i n k g}

. Neither no. of moles nor the wt. of solvent is changing with change in temperature. Hence (b) is the correct option.

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