We use a number of acids and bases in our life. Some of these are used

1.	We use a number of acids and bases in our life. Some of these are used as medicine or in household whereas some others are used in the industry. Besides, many fruits, vegetables and other eatables also contain acids, useful for the living system. Now answer the following questions: (i) Name three acids used in the eatables. Give one use of them. (ii) Name three acids used in the industry. Give one important use of each of them. (iii) Name five fruits or vegetables and the acid present in each of them. (iv) Name three bases used in the industry or in household or as medicine and give one important use of each of them.
Answer» (i) Benzoic acid to preserve food, Carbonic acid to make aerated drinks and ethanoic acid used in vinegar. (ii) HCl to clean metals before electroplating or household cleaning, nitric acid in the production of fertilizers and explosives and sulphuric acid as a battery acid and in making fertilizers. (iii) Apples-malic acid, Orange-citric acid, Bananas-malic acid and citric acid, grapesmalic acid and tartaric acid(3:2), Potatoes-malic acid and citric acid, Tomatoes-citric acid and malic acid. (iv) Ammonia in the manufacture of fertilizers, NaOH in the manufacture of soaps, detergents and cleaners and Magnesium hydroxide as antacid to neutralize acidity in stomach.

We use a number of acids and bases in our life. Some of these are used as medicine or in household whereas some others are used in the industry. Besides, many fruits, vegetables and other eatables also contain acids, useful for the living system. Now answer the following questions: (i) Name three acids used in the eatables. Give one use of them. (ii) Name three acids used in the industry. Give one important use of each of them. (iii) Name five fruits or vegetables and the acid present in each of them. (iv) Name three bases used in the industry or in household or as medicine and give one important use of each of them.

Answer»

(i) Benzoic acid to preserve food, Carbonic acid to make aerated drinks and ethanoic acid used in vinegar.

(ii) HCl to clean metals before electroplating or household cleaning, nitric acid in the production of fertilizers and explosives and sulphuric acid as a battery acid and in making fertilizers.

(iii) Apples-malic acid, Orange-citric acid, Bananas-malic acid and citric acid, grapesmalic acid and tartaric acid(3:2), Potatoes-malic acid and citric acid, Tomatoes-citric acid and malic acid.

(iv) Ammonia in the manufacture of fertilizers, NaOH in the manufacture of soaps, detergents and cleaners and Magnesium hydroxide as antacid to neutralize acidity in stomach.

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