Question

The reduction in the freezing point of a solution is _____ to molal concentration.

inversely proportional
directly proportional
not related
unimportant

Answer 1

B would be your answer

Answer 2

Answer : The correct option is, directly proportional

Explanation :

Formula used for lowering in freezing point :

`\Delta T_f=k_f* m\\\\T^o_f-T_f=k_f* m`

where,

`\DeltaT_f` = change in freezing point

`T^o_f` = freezing point of pure solvent

`T_f` = freezing point of solution

`k_f` = freezing point constant

m = molality

From this we conclude that the reduction in the freezing point of a solution is directly proportional to the molal concentration.

Hence, the correct option is, directly proportional