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Fill inthe blanks:
1. Acids and bases have mutually opposite properties.
2. Bases that dissolve in water are called alkalis.
Match the Pair:
1. Tamarind-Tartaric acid
2. Lemon-Citric acid
True or False:
1. Common salt is acidic -False
2. Oxides of metals are basic. - True
Answer in one sentence:
1. What is meant by neutralisation?
Ans: The chemical reaction that takes place between acid and bases is called neutralization.
2. Name some basic salts.
Ans: Washing Soda and Baking Soda are the examples of basic salts.
Answer in Short:
1. Why quick lime or slaked lime is added to soil?
Ans: Overuse of chemical fertilizers makes the soil acidic. At such time, quick lime is added to the soil so that acids in soil reacts with base and neutralisation take place and soil become fertile.
Distinguish between:
Give Reasons:
1. Blue litmus changes to red in soda cold drink.
Ans: Blue litmus changes to red when solution is basic in nature. Cold drinks are basic in nature because sodium bicarbonate salts are present in cold drink. So, blue litmus changes to red in soda cold drink.