Question

The chemical formula of chalk is:

• A. MgCO$_3$
• B. Na$_2$CO$_3$
• C. CaCO$_3$
• D. Mg(HCO$_3$)$_2$ \bigskip

Hint:

Calcium carbonate is widely used in construction (cement), as an antacid, and in school chalk.

Answer 1

The Correct Option is C

Chalk is chemically calcium carbonate (CaCO$_3$), which is commonly found in limestone and shells.