Respuesta :
Answer : The correct option is, directly proportional
Explanation :
Formula used for lowering in freezing point :
[tex]\Delta T_f=k_f\times m\\\\T^o_f-T_f=k_f\times m[/tex]
where,
[tex]\DeltaT_f[/tex] = change in freezing point
[tex]T^o_f[/tex] = freezing point of pure solvent
[tex]T_f[/tex] = freezing point of solution
[tex]k_f[/tex] = 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
