Q2 / 90 · JEE Main 2023 (06 Apr Shift 1) · Chemistry

The setting time of Cement is increased by adding

  • A
    Clay
  • B
    Silica
  • Correct answer
    C
    Gypsum
  • D
    Limestone

Solution

Cement or Portland cement mainly contains oxides of calcium, silicon, aluminium, and iron. When water is mixed with cement, the oxides get hydrated, and cement sets extremely fast. To control the setting time of cement, gypsum is added to it, which increases the setting time of cement.

Hence, the correct answer is option: 'C'.

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