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Question

If there is no net movement of water (solvent) between two solutions separated by a semipermeable membrane, the solutions are said to be _____ to each other

A
hypertonic
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B
dilute
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C
isotonic
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D
hypotonic
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Solution

The correct option is C isotonic

Tonicity is a relative concentration of solutes in a solution which determines the direction of movement of water through a semipermeable membrane. It is a relative term.
Hypotonic solution is the solution where solute concentration is less than that of a reference solution.
An isotonic solution has the same concentration of solutes as that of reference solution separated by a semipermeable membrane and thus causes no net movement of water.
A Hypertonic solution has more concentration of solutes than the reference solution.


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