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Question

Identify X in the below equation.

CaCO3+HClCaCl2+X+H2O

A
O2
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B
CO2
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C
Cl2
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D
H2
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Solution

The correct option is B CO2
  • A metal carbonate always react with an acid to give its corresponding metal salt along with carbon dioxide and water.
  • In the given equation, calcium carbonate is a metal carbonate which on reaction with hydrochloric acid gives its corresponding salt along with carbon dioxide and water.

CaCO3(s) +2HCl(aq) CaCl2(aq) + CO2(g) + H2O(l)

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