The solution in which the whole green chillies are soaked is a mixture of vinegar and water.
The reason why green chillies are kept in this solution for long hours is to reduce the heat of the spice. Doing so will not only reduce the spiciness of the chillies, but will also add a Savoury taste to them.
Why is vinegar used in food preservation?
Vinegar is acidic in nature. It ret ards the growth of the microorganisms, which can grow, contaminate, and spoil the food. This is why vinegar has been used as a preservative, for many years. Foods dipped in vinegar are safe to consume, even after months.
Thus, to reduce the heat of the spice.
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