WBCS.LIVE practice question

Which among the following is a major constituent of cement?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Gypsum
  2. Limestone
  3. Ashes
  4. Clay

Correct answer and explanation

Correct answer: Limestone

Explanation: The correct answer is B. Limestone. Limestone is the primary raw material used in the manufacturing of cement, as it provides calcium carbonate (CaCO₃), which forms the bulk of cement composition. It undergoes calcination to form lime, which then reacts with other materials to form clinker. Although gypsum is also added, it is only in small quantity to control setting time.