Discussion
Iodised salt is a
Answer: A
Iodised salt is a mixture of potassium iodide and common salt.
Common salt (sodium chloride) is fortified by adding a small amount of an iodine compound, traditionally potassium iodide and now often potassium iodate, to prevent iodine deficiency disorders such as goitre. The additive is simply mixed in, and each substance keeps its own properties, so the product is a mixture, not a compound.
Molecular iodine is not used, because it is volatile and would escape, and it does not combine with sodium chloride to form a compound. 'Only potassium iodide' is wrong because most of iodised salt is still common salt.
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