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During osmosis, the flow of water through a semi-permeable membrane is :

  1. A
    from a solution having higher concentration only
  2. B
    from both sides of the semi-permeable membrane with equal flow rates
  3. C
    from both sides of the semi-permeable membrane with unequal flow rates
  4. D
    from a solution having lower concentration only

Solution & Step-by-step Explanation

Water molecules constantly move in both directions across a semi-permeable membrane. However, because the activity of water is higher in the less concentrated solution, the rate of water molecules moving from lower solute concentration to higher solute concentration is greater, resulting in a net unequal flow.

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During osmosis, the flow of water through a semi-permeable membrane is :
A
from a solution having higher concentration only
B
from both sides of the semi-permeable membrane with equal flow rates
C
from both sides of the semi-permeable membrane with unequal flow rates
D
from a solution having lower concentration only

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