Question

The molecular formula of common salt is:
a.) KCl
b.) ${ { CaCl }_{ 2 } }$
c.) ${ NaHCO }_{ 3 }$
d.) NaCl

Answer 1

Hint: Molecular Formula: A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound. The molecular formula of common salt contains sodium and chlorine elements.

Complete step by step solution:
KCl: It is potassium chloride. It is a metal halide salt which is formed of potassium and chlorine. It’s white-colored or crystal appearance. It is light sensitive.
${ { CaCl }_{ 2 } }$: It is known as calcium chloride. It is an odorless white powder. It has a high melting and boiling point. It is used in the treatment of hypocalcemic tetany.
${ NaHCO }_{ 3 }$: It is sodium bicarbonate.it is a white crystalline powder. It is also known as sodium hydrogen carbonate. It is used as an antacid to relieve heartburn and acid indigestion. It’s insoluble in ethanol and a little bit soluble in acetone and methanol.
NaCl: It is called sodium chloride. It is also known as common salt. It is also a white crystalline solid. It has a salty taste. It’s soluble in water and it is hygroscopic in nature. It can conduct electricity in its molten state.
Hence, the molecular formula of common salt is NaCl.
The correct option is D.

Note: The possibility to make a mistake is that you may choose option A. As sodium chloride is also known as Table salt, so you may confuse it as KCl is also a salt but it's not a common salt.