Match List I with List II and select the correct answer using the codes given below the lists: | List- I | | List-II A. | Blue vitriol | 1. | Sodium bicarbonate B. | Epsom salt | 2. | Sodium hydroxide C. | Baking soda | 3. | Magnesium sulphate D. | Caustic soda | 4. | Copper sulphate Codes: ABCD

Match List I with List II and select the correct… - IAS 1998 Science PYQ

IAS 1998 — Science Chemistry

1998mcqeasy

Match List I with List II and select the correct answer using the codes given below the lists:

	List- I		List-II
A.	Blue vitriol	1.	Sodium bicarbonate
B.	Epsom salt	2.	Sodium hydroxide
C.	Baking soda	3.	Magnesium sulphate
D.	Caustic soda	4.	Copper sulphate

Codes:
ABCD

Official previous-year question

Prelims GS Paper I.

Options

A3421
B4321
C3412
D4312

Did you get this right?

Solution

Correct Option (D):

A. Blue vitriol is chemically known as copper sulphate (CuSO₄·5H₂O).
B. Epsom salt is magnesium sulphate (MgSO₄·7H₂O).
C. Baking soda is sodium bicarbonate (NaHCO₃).
D. Caustic soda is sodium hydroxide (NaOH).

The correct matching sequence is A-4, B-3, C-1, D-2, which corresponds to the code 4312.

Incorrect Options

Options (1), (2), and (3) are incorrect as they present different pairings for the substances listed in List I with their chemical names in List II. Each of these options contains at least one mismatch with the correct chemical identities and formulas of the compounds.

Your note

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