Question

Give reason when you sprinkle some common salt on grass growing on a lawn, it is killed at that spot

Answer 1

if common salt is sprinkled on the grass, then it dies because adding salt results in loss of water from the grass cells due to exosmosis. as the concentration of salt is more outside the cells, the water leaves the cell to maintain equilibrium on both sides of the cell. this results in excessive loss of water from the cell resulting in cell death.