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Question

As a result of osmosis, the volume of the concentrated solution:

A
gradually decreases
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B
gradually increases
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C
suddenly increases
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D
none of the above
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Solution

The correct option is B gradually increases
As a result of osmosis, the volume of the concentrated solution gradually increases. Solvent particles are small and can very easily pass through these holes, therefore, solute particles are larger and cannot pass through.

When a semipermeable membrane separates a solution from the pure solvent, solvent molecules move back and forth through the membrane, but not in equal numbers. More move from the pure solvent into the solution than from the solution into the solvent increases the volume of the solution.

Hence, option B is correct.

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