Questions:

1. When a living cell is immersed in a solution, it has same concentration as that of the outer solution. What is the solution called?
(a) Hypotonic
(b) Hypertonic
(c) Isotonic
(d) All of these

2. When the raisins are put in water, after some time these swell up due to
(a) exosmosis.
(b) endosmosis.
(c) transpiration.
(d) plasmolysis.

3. The movement of the substances into and out of the living cell depends upon the property of
(a) exosmosis.
(b) endosmosis.
(c) permeability.
(d) all of these.

4. Raisins that are selected for absorption experiment
(a) must have stalk intact.
(b) must not have stalk intact.
(c) must be chopped properly.
(d) none of these.

5. Students A, B and C were given five raisins each of equal weight. The raisins were soaked in distilled water at room temperature. A removed the raisins after 20 minutes, B after 2 hours and C after 40 minutes. If P A, PB and Pc denote percentage absorption of water obtained by students A, B and C respectively, then
(a) P_A > P_B > P_C
(b) P_A < P_B < P_C
(c) P_A < P_B > P_C
(d) P_A = P_B = P_C

6. Raisins are kept in water because
(a) inner concentration of solute is more in raisins.
(b) inner concentration of solvent is more in raisins.
(c) inner concentration of solute is less in raisins.
(d) inner concentration of solvent is less in raisins.

7. What will happen, if swollen raisins are kept for some time in 1 M sucrose solution?
(a) Raisins will swell up more due to more absorption.
(b) Raisins will shrink due to plasmolysis.
(c) Raisins will remain same in size.
(d) Raisins will germinate.

8. In an absorption experiment, the raisins are kept in water for
(a) 2-3 minutes
(b) 20-30 minutes
(c) 2-3 hours
(d) 2-3 days

9. What should not be done during experiment?
(a) Raisins with intact stalks must be selected.
(b) Weighing must be accurate.
(c) Raisins should be completely immersed in water.
(d) Before taking raisins find weight, raisins must be pressed hard with blotting paper to dry up.

10. A student soaked 10 g of raisins in 50 mL of distilled water in two beakers A and B each. She maintained beaker A at 25°C and beaker B at 50°C. After an hour, the percentage of water absorbed will be
(a) the same in both A and B.
(b) more in A than in B.
(c) more in B than in A.
(d) exactly twice as much in B as in A.