Home PYQs UPPSC UPPSC MCQs Prelims 1993 (GS Paper I)

Question

Chemical name of limestone is?

  1. Calcium carbonate
  2. Magnesium chloride
  3. Sodium chloride
  4. Sodium sulphide

Answer:

Option A: Calcium carbonate

Detailed Solution:

The correct answer is “Calcium carbonate”.

Limestone is primarily composed of calcium carbonate, which has the chemical formula CaCO3.