Question

Which of the following is a white substance, having alkaline nature in solution?

• A. NaNO₃
• B. NH₄Cl
• C. Na₂CO₃
• D. Fe₂O₃

Answer 1

The correct option is C

Na₂CO₃

When sodium carbonate (${\text{Na}}_2{\text{CO}}_3$), a white substance, is added in water, it forms carbonic acid (${\text{H}}_2{\text{CO}}_3$) and sodium hydroxide ($\text{NaOH}$), which is a strong base.