Question

when a plant cell may burst

Answer 1

When the plant cell is placed in a hypotonic solution , it takes up water by osmosis and starts to swell, but the cell wall prevents it from bursting. The plant cell is said to have become "turgid" i.e. swollen and hard. The pressure inside the cell rises until this internal pressure is equal to the pressure outside.

Answer 2

The plant cell doesn't burst as it has cell wall. However an animal cell will burst if placed in the hypotonic solution as it lacks cell wall. When water enters into the plant cell it develops turgor pressure and an equal and opposite pressure I.e.