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Q: Unslaked lime is :
  • A. calcium carbonate
  • B. calcium oxide
  • C. calcium hydroxide
  • D. calcium sulphate
Correct Answer: Option B - Unslaked lime- Unslaked lime or quick lime (CaO) pure lime. generally called quick, however, contains more or less magnesium oxide, which gives the product a brownish or grayish tinge. Quick lime obtained after the calcination of limestone. It is also called caustic lime. It is capable of slaking with water and has no affinity for carbonic acid. The specific gravity of pure lime is about 3.40.
B. Unslaked lime- Unslaked lime or quick lime (CaO) pure lime. generally called quick, however, contains more or less magnesium oxide, which gives the product a brownish or grayish tinge. Quick lime obtained after the calcination of limestone. It is also called caustic lime. It is capable of slaking with water and has no affinity for carbonic acid. The specific gravity of pure lime is about 3.40.

Explanations:

Unslaked lime- Unslaked lime or quick lime (CaO) pure lime. generally called quick, however, contains more or less magnesium oxide, which gives the product a brownish or grayish tinge. Quick lime obtained after the calcination of limestone. It is also called caustic lime. It is capable of slaking with water and has no affinity for carbonic acid. The specific gravity of pure lime is about 3.40.