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(a) Name the chemicals required for the preparation of carbon dioxide in the laboratory.

(b) How will you collect the gas ?

(c) Write the balanced chemical equation for the above reaction.

(d) Draw a labelled diagram for the preparation of CO2 in the laboratory.

(e) Why is sulphuric acid not used for the preparation of carbon dioxide in the laboratory?

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(a) Calcium carbonate and dilute hydrochloric acid.

(b) By upward displacement of air.

(c) CaCO3 + 2HCl → CaCl2 + H2O + CO2.

(d) Laboratory preparation of carbon dioxide

(e) Dilute sulphuric acid reacts with calcium carbonate. But it is not used because the calcium sulfate which is formed during the reaction is insoluble in water. It covers the marble chips and stops the reaction.

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