Question

A person takes concentrated solution of salt, after some time he starts vomiting -why

Answer 1

as salt soln helps in replenishing of water in the body like that of ORS

Answer 2

$\sf\large \blue{\underbrace{\pink{Answer}}}:$

Concentration salt solution is a hypertonic solution (water concentration lower as compared to the cell) therefore it causes exosmosis. The outwatd movement of water from the cell results in irritation and excessive dehydration. This results in reverse movements and hence, vomiting.