Question

In the given graph, $pq$, $qr$ and $st$ represent

• A. $pq\to$ liquid state of solution, $qr\to$ solid state of solution, $st\to$ liquid state of solvent
• B. $pq\to$ liquid state of solvent, $qr\to$ solid state of solvent, $st\to$ liquid state of solution
• C. $pq\to$ liquid state of solvent, $qr\to$ solid state of solution, $st\to$ liquid state of solution
• D. $pq\to$ solid state of solvent, $qr\to$ liquid state of solvent, $st\to$ solid state of solution

Answer 1

Answer: (B)

We know that pure solvent has a higher freezing point in comparison to the solution at a given pressure.
Thus, in the graph $pq$ represents the liquid state of solvent,$qr$ represents solid solvent and st represents the liquid state of solution.
This will happen because of depression in freezing point because of the presence of solute particles present in the solution.