Question

what will happen and why if a blood cell is kept in hypotonic solution

Answer 1

Here is your answer:
If a blood cell is kept in a hypotonic solution the cell will swell up and if we will not remove it it will burst.
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Answer 2

RBC's will get swollen if they are placed in a hypotonic solution. The cells will gain water by osmosis. The cells might burst & repture if they are placed in a hypotonic solution for a longer time.

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