Question

What is W.O.C ?? ...........???

Answer 1

$\huge\underline\mathfrak\blue{Water\:of\:crystallization}$

It is the fixed number of water molecules present in one formula unit of a salt.

The salts with water of crystallization are called hydrated salts.

Example :

Gypsum = 2 W.O.C

CaSO4.2H2O

Answer 2

Answer:

World Customs Organisation.

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this answer.