Consider the figure and mark the correct option.

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Water will move from side A to side B, if a pressure lower than osmotic pressure is applied on piston B

Water will move from side B to side A, if a pressure greater than osmotic pressure is applied on piston B

Water will move from side B to side A, if a pressure equal to osmotic pressure is applied on piston.B

Water will move from side A to side B, if pressure equal to osmotic pressure is applied on piston A

answer is B.

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Detailed Solution

We know that, if a pressure higher than the osmotic pressure is applied on the solution, the solvent will flow from the solution, into the pure solvent through the semipermeable membrane. This process is called reverse osmosis.
Thus, in this case, water will move from side B to side,4 if a pressure greater than osmotic pressure is applied on piston B.
From solvent to solution side, solvent move spontaneously without applying pressure on any side.

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