What will be the direction of movement of water, when a solution A having water potential of – 9 bars and another solution of B of -4 bars is separated by a semipermeable membrane?

Options

(a) B to A
(b) In both A and B directions
(c) A to B
(d) only B directions

Correct Answer:

B to A

Explanation:

The direction of water movement is always from higher wate potential to lower water potential i.e. in energetically downhill direction, the direction of water in this case will be from -4 bars to -9 bars or from solution B to solution A through the semipermeable membrane.