Question

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what is isotonic.??

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Answer 1

Step-by-step explanation:

Isotonic solutions contain equal concentrations of impermeable solutes on either side of the membrane and so the cell neither swells nor shrinks.

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Answer 2

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Isotonic Solution :- A Solution Having A Concentration Such That It Neither Gains Nor Loses Water By Osmosis. This Solution Have Same Osmotic Pressure.

or 

Isotonic solutions :- If there are two solutions A and B, and the concentration of solutes in both the solutions are same, then they are isotonic solution.