(a) Name one natural source of each of the following acids.
(i) Citric acid (ii) Oxalic acid (iii) Lactic acid (iv) Tartaric acid
(b) Which one is commonly produced by all acids.

Explanation

(a) (i) Citrus fruits such as lemons, organes etc. (ii) Tomatoes (iii) Milk (iv) Tamrind.
(b) All acids have atlest one or more hydrogen atoms present in their molecules. They release the same in aqueous solution as `H^(+)` ions. The `H^(+)` ion as such is unstable and exist in combination with a molecule of `H_(2)O` and is known as hydronium ion `(H_(3)O^(+)ion).`