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charcoal is burnt in air.The gas evolved is ....[x]...This gas is passed through a clear solution....[y]... A White precipitate....[z]is formed.If Z Identified as calciumcarbonate,identify X and write for two reactions.

If burnt in sufficient oxygen, charcoal gives carbon dioxide CO₂.

C + O₂ ? CO₂

Then it is passed through a clear solution of Calcium Chloride,

 CaCl₂ + H₂O + CO₂ ? CaCO₃ + 2HCl