Salt that has had any contaminates removed.
purified
purified
Purified salt may not be safe to eat because it may have the bacteria of the rock salt on it still. To make it pure you should boil the bacteria off the salt after it has been purified.
It all depends on what you mean. Tap water has more salt than purified water but purified water can hold more salt if salt is added. There is more room, so to speak, for the salt ions to fit into a container.
Because salt doesn't sublime !
Rock salt (impure salt) is frequently colored.
Yes, it is true; but the table salt (sodium chloride) is purified.
For purified salt, any difference - sodium chloride (NaCl).
If it is used as a food additive, yes.
yes
Vacuum crystallization of salt is used in salt processing plants.
Sodium chloride is extracted from salt mines or sea water and after this is purified to become table salt.