Imbibition by Raisins
 1) In the process of Imbibition, the substance that imbibes water is called ______________ Adsorbent Imbibant Osmosis Hydrophilic

 2) What is the process of Imbibition? Plant cells (living or dead) absorb water by surface attraction. Plant absorbs water and nutrients from the soil. Solution from the cell moves into outer solution through a semi-permeable membrane. Solution from the cell moves into outer solution by surface attraction.

 3) In the process of imbibition the liquid which is imbibed is called ______________. Adsorbent Imbibant Osmosis Hydrophilic

 4) How does imbibition depend on temperature? It decreases with rise in temperature. It increases with rise in temperature. It is not effected by temperature. None of the above.

 5) During the course of the experiment ‘to determine the percentage of water absorbed by raisins’, how often are the raisins weighed? Every half an hour. Every hour. Once- Only after completing the experiment. Two times-Before soaking and after soaking in water.

 6) To observe imbibition well, for how long should the raisins be soaked in water? 1 minute. 10 minutes. 2-3 hours. 30 minutes.

 7) Following are the steps involved in the experiment ‘to determine the percentage of water absorbed by raisins’. They are not in proper sequence. (I) Soak the raisins in fresh water (II) Weigh dry raisin (III) Weigh soaked raisin (IV) Wipe out soaked raisin. What is the correct sequence of steps? I, II, III, IV II, I, III, IV III, II, I, IV II, I, IV, III

 8) At the end of the experiment to determine the percentage of water absorbed by raisins, the raisins are wiped just before weighing. What does this ensure? Hands do not get wet. The raisin lose water before weighing. The weighing scale does not get wet. ter absorbed by raisins is weighed.

 9) In order to obtain correct result of percentage of water imbibed by raisins, what should be done? Raisins should be fully immersed in water. Raisins should be soaked in water for 2-4 hours. Raisins should be clean and dry. All of these.

 10) Twenty dry raisins were soaked in 50 ml of water and kept for one hour at 50°C. Which of the following is the correct observation? 8 raisins absorbed water, 12 did not. 10 raisins absorbed water, 10 did not. 15 raisins absorbed water, 5 did not. All 20 raisins absorbed water.

 11) A student dissolved 1 gm of sugar in 10 ml of distilled water in beaker A. He dissolved 10 gm of sugar in 100 ml of distilled water in beaker B. Then he dropped a few raisins in each. After two hours, what did he find had happened to the raisins? Swollen in A and shrunken in B. Shrunken in B and swollen in A. Swollen in both. Shrunken in both.

 12) 5gm of raisins was placed in distilled water for 24 hours. The weight of soaked raisins was found to be 7gm. What was the correct percentage of water absorbed by the raisins? 20% 30% 40% 50%

 13) If raisins are soaked in salt solution, what will happen to the raisins? Will shrink. Will swell. Will remain of the same size. None of these.