Question

Which of the following is basic in nature?

• A. Lemon
• B. Apple
• C. Curd
• D. Caustic soda

Answer 1

The correct option is D Caustic soda

Generally, acids are sour in taste and bases are bitter in taste. Lemon, apple and curd contain acids in it. They release ${\text{H}}^{+}$ ions in aqueous solution.
The chemical formula of caustic soda is $\text{NaOH}$. It releases ${\text{OH}}^{-}$ ions in aqueous solution. So, it is basic in nature.