Question

Why pickles don't get spoiled and why sambar will be spoiled

Answer 1

The salt in the pickle makes the harmful bacteria’s to undergo exosmosis. As a result, bacteria's or spoiling micro organisms lose water and die and pickles are not spoiled. But this doesn’t occur in sambar.

Answer 2

Pickles contain high concentration of salts and a lot of oil and no or very low water content. Therefore these conditions does not allow growth of microorganisms. But in sambar situation is reverse,especially water content is large, which is favorable for growth of microorganisms.