Question

If you are provided with some vegetables to cook, generally​ add salt to Vegetables during cooking process.what would happen after adding salt? what mechanism is responsible for this

Answer 1

After adding salt, water comes out.
If the medium has a lower concentration of water than the cell, meaning that it is very concentrated ,the cell will lose water by osmosis. Therefore the cell will shrink.

Answer 2

When we add salt to the water, it prevents water from going inside the vegetables. The process is called Osmosis. 

Definition of Osmosis:
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Osmosis is defined as a process when water molecules go from a less concentrated region to a more concentrated region across a semi-permeable membrane. 

When you add salt, the outside environments become more concentrated and hence will prevent water from crossing the peel of the vegetables and going inside.