The characteristic properties of acids and bases — practice question

Which solution shows the lowest pH?

• A$0.1\,\text{mol dm}^{-3}$ ammonia solution
• B$0.1\,\text{mol dm}^{-3}$ ethanoic acid
• C$0.1\,\text{mol dm}^{-3}$ lithium hydroxide
• D$0.1\,\text{mol dm}^{-3}$ nitric acid