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JEE Main202315 Apr 2023Morning ShiftChemistryp Block Elements (Group 13 & 14)Actual

For a good quality cement, the ratio of silica to alumina is found to be

Options

  1. A1 . 5
  2. B4 . 5
  3. C2
  4. D3

Correct answer

D. 3

Step-by-step solution

For a good quality cement the ratio of silica ( SiO 2 ) and alumina ( Al 2 O 3 ) should be between 2 . 5   to   4 . 0 . Similarly, the ratio of lime ( CaO ) to the total oxide mixtures consisting of SiO 2 , Al 2 O 3 and Fe 2 O 3 should be roughly 2 : 1 : 1 , If lime is in excess, the cement cracks during setting.

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