question_answer

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

A)                 B to A                   

B)                 A to B

C)                 both directions

D)                  none of these

Correct Answer: A

Solution :

Water potential is the ability of a system to donate water to other system. If two systems as given in the question are in contact then water moves from higher water potential (less negative) system to the lower water potential (more negative) system.