Chapter-2 Acid And Base Class 10
Most Important Questions and Answers of Chapter 2 In Class 10 CBSE Science Question 1. With the help of an example explain what happens when a base reacts with a non- metallic oxide. What do you infer about the nature of non-metal oxide? (Board Term I, 2017) Answer: Oxides of non-metals react with bases to form salt and water. For example, the reaction between carbon dioxide and calcium hydroxide. Calcium hydroxide, which is a base, reacts with carbon dioxide to produce salt and water. Hence, oxides of non-metals are acidic in nature. Question 2. What is observed when carbon dioxide gas is passed through lime water (i) for a short duration? (ii) for a long duration? Also write the chemical equations for the reactions involved. (Board Term I, 2016) Answer: (i) When CO 2 is passed through lime water for short interval of time, it turns milky due to the formation of insoluble calcium carbonate. (ii) If CO 2 is passed for long duration through lime water, the white precipitate formed di