Match List-I with List-II and select the correct answer using the code

Match List-I with List-II and select the correct answer using the code given below the Lists :

List-I
(Compound)
List-II
(Use)
A. Boric acid1. Antiseptic
B. Citric acid2. Food preservative
C. Magnesium hydroxide3. Antacid
D. Acetic acid4. Pickle

Code :

A-1, B-2, C-3, D-4
A-1, B-3, C-2, D-4
A-4, B-3, C-2, D-1
A-4, B-2, C-3, D-1
This question was previously asked in
UPSC CDS-1 – 2020
The matching is as follows:
– A. Boric acid: Known for its mild antiseptic properties, often used in eyewashes and topical applications.
– B. Citric acid: A common food additive used as a preservative due to its acidic nature and antioxidant properties.
– C. Magnesium hydroxide: A component of antacids (like Milk of Magnesia) used to neutralize excess stomach acid.
– D. Acetic acid: The main component of vinegar, commonly used in pickling as both a flavouring agent and preservative.
Thus, the correct mapping is A-1, B-2, C-3, D-4.
– Boric acid acts as an antiseptic.
– Citric acid functions as a food preservative.
– Magnesium hydroxide is used as an antacid.
– Acetic acid is used in pickles.
Many substances have multiple uses. For instance, citric acid is also used in cleaning products and cosmetics. Magnesium hydroxide is also used as a laxative at higher doses.