Q. 75.0( 1 Vote )

Observe the given chemical change and answer the following:



i) Identify ‘A’ and ‘B’.

ii) Write the commercial name of calcium hydroxide.

iii) Identify products ‘C’ and 'D' , when HCl is allowed to react with calcium oxide.

iv) Say whether calcium oxide is acidic or basic.

Answer :

(i) A is Calcium carbonate (CaCO3 ) and B is carbon dioxide (CO2). Both of these are obtained from the following reaction : -

CaO CaCO3


(ii) The commercial name of calcium hydroxide is slaked lime.


(iii) The products ‘C’ and 'D' , when HCl is allowed to react with calcium oxide are Calcium chloride(CaCl2) and water(H2O).


(iv) Calcium oxide is basic, it could be understood by its reaction with an acid as in the above case with hydrochloric acid. With hydrochloric acid it reacts to form a salt(Calcium chloride(CaCl2)) and water in the same way as a base reacts with an acid to form salt and water. Hence calcium oxide is basic


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