Question

Match the acids given in Column (A) with their correct source given in Column (B)

Column 1	Column 2
Lactic Acid	Tomato
Acetic Acid	Lemon
Citric Acid	Vinegar
Oxalic Acid	Curd

Answer 1

A) Lactic acid- IV) Curd

1. The curd is produced due to the presence of a reaction between lactic acid bacteria and the milk protein casein.
2. Lactic acid is an organic acid with a chemical formula ${\mathrm{C}}_3{\mathrm{H}}_6{\mathrm{O}}_3$.

B) Acetic acid- III) Vinegar

1. The acetic acid is produced by reacting carbon dioxide with methyl alcohol utilizing cobalt as a catalyst.
2. A very dilute solution of acetic acid is vinegar.

C) Citric acid- II) Lemon

1. Citric acid is a weak organic acid that naturally occurs in citrus fruits such as limes, lemons etc. The molecular formula is ${\mathrm{C}}_6{\mathrm{H}}_8{\mathrm{O}}_7$.
2. The acid present in lemon is citric acid.

D) Oxalic acid- I) Tomato

1. Tomato contains more than ten types of acids.
2. Examples: citric acid, malic acid, ascorbic acid and oxalic acid.

Therefore,

Acid	Source
A. Lactic acid	4. Curd
B. Acetic acid	3. Vinegar
C. Citric acid	2. Lemon
D. Oxalic acid	1. Tomato