1.

A compound is used as drying agent as such or as soda lime with NaOH and it is used on a very large scale as a building material. (a) Which is this compound? (b) How can we prepare this compound? (c) What are the properties of this compound?

Answer»

(a) Calcium oxide 

(b) It can be prepared by heating lime stone in a rotary kiln at 1070-1270 K. 

(c) Pure calcium oxide is an amorphous white solid of very high melting point. It is sparingly soluble in water. Calcium oxide readily absorbs moisture and carbon dioxide.



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