Question

Which graph correctly shows the effect on the freezing point caused by increasing the molality of a solution ?

Answer 1

the answer to your question is graph A :)

Answer 2

The first one among the four attached graphs correctly shows the effect on the freezing point caused by increasing the molality of a solution

Step-by-step explanation:

According to colligative property of molecules-
`\Delta T_(f)=k_(f).m`

where
`\Delta T_(f)` is the depression in freezing point
`(F_(p))`

`k_(f)` is cryogenic constant of solvent and m is molality of solution

As
`k_(f)` is constant for a certain solvent therefore the above relation is similar to linear equation y=mx. here y represents
`\Delta T_(f)` and x represents m

So a graph between
`\Delta T_(f)` and m would give straight line passing through origin

If we extrapolate the first graph by joining all the points then it will give a straight line passing through origin.

Hence the first graph is the correct one depicting change in freezing point with molality