Question

why if a person take concentrated solution of salt vomits after some time?

Answer 1

when we drink salty solution it makes us vomit bcz salt solution is a hypertonic solution therefore it causes exosmosis.outward movement of water from the cell results I irritation
and excessive dehydration .this results in reverse movement and hence,vomiting.

Answer 2

when we intake a concentrated solution of salt we vomit because it works like a hypertonic solution and when it enters our stomach the process of exosmosis starts and the water level is dropped quickly. Thus exosmosis in our stomach leads to vomit