Easy MCQ +4 / -1 PYQ · JEE Mains 2022

Portland cement contains 'X' to enhance the setting time. What is 'X'?

  1. A $\mathrm{CaSO}_{4} \cdot \frac{1}{2} \mathrm{H}_{2} \mathrm{O}$
  2. B $\mathrm{CaSO}_{4} \cdot 2 \mathrm{H}_{2} \mathrm{O}$ Correct answer
  3. C $\mathrm{CaSO}_{4}$
  4. D $\mathrm{CaCO}_{3}$

Solution

Gypsum is added in portland cement to slow down the process of setting of the cement so that it gets sufficient time to hardened.

About this question

Subject: Chemistry · Chapter: s-Block Elements · Topic: Alkali Metals

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