Question

Match the acid given in column (I) with their source given in column (II).

Column (I)	Column(II)
(1) Lactic acid	(i) Tomato
(2) Acetic acid	(ii) Lemon
(3) Citric acid	(iii) Vinegar
(4) Oxalic acid	(iv) Curd

• A. (1) $\to$ (iv), (2) $\to$ (iii), (3) $\to$ (ii), (4) $\to$ (i)
• B. (1) $\to$ (ii), (2) $\to$ (i), (3) $\to$ (iv), (4) $\to$ (iii)
• C. (1) $\to$ (i), (2) $\to$ (ii), (3) $\to$ (iii), (4) $\to$ (iv)
• D. (1) $\to$ (iii), (2) $\to$ (iv), (3) $\to$ (i), (4) $\to$ (ii)

Answer 1

Answer: (A)

(1) $\to$ (iv), (2) $\to$ (iii), (3) $\to$ (ii), (4) $\to$ (i)

1) Milk contains lactic acid in which the bacterial action of lactase takes place which changes the pH of milk and makes it more acidic in nature forming curd from milk.
2)Vinegar contains an organic compound in the form of acetic acid which gives it slightly sour taste.
3) Citric acid is a weak organic compound which is used as a natural preservative and used with sodium bicarbonate to treat indigestion.
4) Oxalic acid is present in tomatoes which is an organic compound known as dicarboxylic acid. It has higher acidic strength than acetic acid.