Question

A student put five raisins each in two beakers A and B. Beaker A contained 50 ml of distilled water and beaker B had 50 ml of saturated sugar solution. After sometime, the student would observe that

• A. Raisins in beaker A were more swollen than those in beaker B.
• B. Raisins in beaker B were more swollen than those in beaker A.
• C. Raisins in both beaker A and B were equally swollen.
• D. Raisins in beaker A did not swell up at all.

Answer 1

The correct option is A Raisins in beaker A were more swollen than those in beaker B.

Raisins in the beaker A will swell as solution surrounding them is hypotonic in nature. Hypotonic solution contains lesser solute concentration. In such case, endosmosis will occur in which inward movement of the water molecules from the lower solute concentration to higher solute concentration through raisin covering.
Raisins in the beaker B will shrink as solution surrounding them is hypertonic in nature. Hypertonic solution contains higher solute concentration. In such case, exosmosis will occur in which outward movement of the water molecules from the lower solute concentration to higher solute concentration through raisin covering.