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RRB RPF RPSF SI and CONS Model Papers 8 with solutions

Question : 107 of 120

Marks: +1, -0

What is the chemical name of quick lime?

Solution:

(3) Calcium oxide (CaO) is commonly known as quicklime. The raw material used for the manufacture of quicklime is calcium carbonate

(\mathrm{CaCO}_3)

.Lime is manufactured by heating the calcium carbonate to a temperature of 1273 K in a lime kiln.

\begin{array}{c c c c} \mathrm{CaCO}_3 & \rightarrow & \mathrm{CaO}\,+ & \mathrm{CO}_2 \\ \text{Lime stone} & \text{Lime} & & \text{Carbon dioxide} \end{array}

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