Question

The principle by which blotting paper absorbs water is

• A. Capillary action
• B. Transpiration pull
• C. Root pressure
• D. Absorptive capacity

Answer 1

The correct option is A Capillary action

(A)Capillary action is the name of force by which water or any sap is pulled upwards direct through fine fibres or tubes. Blotting paper absorbs the water through capillary action only as thin threads like structure are present in blotting paper.

(B)Transpiration pull is also the process of upward movement of sap but it occurs during the process of transpiration.

(C)Root pressure is the transverse osmotic force causing sap rise in plants.

(D)Absorptive capacity is the capacity of absorption.

So, the correct answer is 'Capillary action'.