Question

Compound "X"decomposes to form compound "Y" and CO2 gas.Compound "Y" is used in manufacturing of cement.
a) Name the compound "X" and "Y".
b) Write the chemical equation for the reaction.

Answer 1

Calcium carbonate
(limestone) decomposes on heating
to give calcium oxide and carbon
dioxide.
Caco3 (s) -----Cao(s) + CO2 (g)
calcium calcium Carbonate
Carbonate oxide dioxide
X-calcium carbonate
Y-calcium oxide
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Answer 2

Answer :

(a) The name of the compound 'X' and 'Y' are, calcium carbonate and calcium oxide respectively.

(b) The chemical reaction is,

$CaCO_3(s)\overset{\Delta}\rightarrow CaO(s)+CO_2(g)$

Explanation :

Decomposition reaction : It is a type of reaction in which one larger molecule decompose or breaks in to two or more molecules.

As per question, when compound "X" which is solid calcium carbonate decomposes then it forms compound "Y" which is solid calcium oxide and $CO_2$ as a gas.

The balanced chemical reaction will be,

$CaCO_3(s)\overset{\Delta}\rightarrow CaO(s)+CO_2(g)$

Hence, the name of the compound 'X' and 'Y' are, calcium carbonate and calcium oxide respectively.