Question : Raghunath accidentally dropped bag of raisinsinto water. He did not remove it from water by mistake. Later his Master scolded him for spoilling raisins. So he placed them in sun. After few hours, the raisins were apparently dry and resembled to the original raisins. (1) What did he observe initially and later ? (2) Which membrane acts as semi-permeablemembrane in this endosmosis and exosmosis? (3) What values are seen in Raghunath ?

Question : Raghunath accidentally dropped bag of raisinsinto water. He

1.	Question : Raghunath accidentally dropped bag of raisinsinto water. He did not remove it from water by mistake. Later his Master scolded him for spoilling raisins. So he placed them in sun. After few hours, the raisins were apparently dry and resembled to the original raisins. (1) What did he observe initially and later ? (2) Which membrane acts as semi-permeablemembrane in this endosmosis and exosmosis? (3) What values are seen in Raghunath ?
Answer» Solution :( 1 ) The raisins swelled up due to endosmosis as the water entered in them. Later after placing the raisins in sun, they started DRYING up. The high temperature EVAPORATED the water and now endosmosis OCCURRED. (2) The outermost membrane of the raisins acted as the semi-permeable membrane. (3) Raghunath is talented enough to make the raisins dry. He UNDERSTANDS the concept of osmosis and hence he skillfully converts the raisins back to their original shape and form.