Chemistry : Acids, Bases And Salts

Q 3 / 4

UPSC CSE Prelims 1998

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

EXPLANATION

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.

SOURCENCERT Class 10 Science Chapter 2: Acids, Bases and Salts