Fill in the missing data in the following table:

Name the acid present in the following:

(a) Tomato

(b) Vinegar

(c) Tamarind

(a) What is an alkali? Give an example.

(b) Why do HCl, HNO₃, etc. show acidic characters in aqueous solutions while solutions while solutions of compounds like alcohol and glucose do not show acidic character?

A white coloured powder is used by doctors for supporting fractured bones.

(a) Write chemical name and formula of the powder.

(b) When this white powder is mixed with water a hard-solid mass is obtained. Write balanced chemical equation for the change.

A gas ‘X’ reacts with lime water and forms a compound ‘Y’ which is used as a bleaching agent in chemical industry. Identify ‘X’ and ‘Y’. Give the chemical equation of the reactions involved.