Question

Dry raisins are soaked in pure water and later transferred into a sugar solution which of the following statements correctly describes the changes observed in raisins?

• A. Raisins remain same in pure water and shrink in sugar solution.
• B. Raisins swell in pure water and shrink in sugar solution.
• C. Raisins remain same in pure water and swell in sugar solution.
• D. Raisins swell in pure water and burst in sugar solution.

Answer 1

The correct option is B Raisins swell in pure water and shrink in sugar solution.

Pure water serves as a hypotonic solution relative to the raisins, the dry raisins first swell due to net movement of water inside the raisins.
Sugar solution is hypertonic and hence the swollen raisins shrink when kept in this solution due to net movement of water from the raisins.