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JEE Main 20238 AprilMorning Shift
Exam
JEE Main
Year
2023
Date
8 April
Shift
Morning Shift
Subject
Chemistry
Chapter
s Block Elements

JEE Main 2023 · 8 April · Morning Shift · Chemistry · s Block Elements

What is the purpose of adding gypsum to cement?

What is the purpose of adding gypsum to cement?

Options

  1. ATo facilitate the hydration of cement
  2. BTo slow down the process of setting
  3. CTo give a hard mass
  4. DTo speed up the process of setting

Correct answer

B. To slow down the process of setting

Step-by-step solution

When mixed with water the setting of cement takes place to give a hard mass. The is due to the hydration of molecules of the constituents and their rearrangement. Gypsum is CaSO4.2H2O{CaSO}_{4} . 2{H}_{2}O. The purpose of adding gypsum is only to slow down the process of setting of the cement so that it gets sufficiently hardened.

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