Question

What is the chemical formula of common salt?
1. KCI
2. H₂O
3. Xe
4. NaCl

Answer 1

Correct Answer - Option 4 : NaCl

The correct answer is NaCl.

• Common salt, used in our kitchen, is chemically sodium chloride and the formula for sodium chloride is NaCl. 
• It is present in vast quantities in seawater, where it is the main mineral constituent. That's why seawater is the main source of common salt.

KCl	The formula for potassium chloride Used in the salt bridge
H2O	Formula for water Up to 60% of the human adult body is water.
Xe	The formula for noble gas, Xenon Used in special lighting devices