The %age of gypsum in the cement is:
Correct answer: B. 2 - 3%
- A. 1 - 2%
- B. 2 - 3%
- C. 3- 4%
- D. 4 - 5%
Explanation
2-3% is the correct range for the amount of gypsum typically added to cement. Gypsum is added in this proportion to regulate the setting time of the cement and prevent flash setting.
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Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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