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

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Solution

(a) Calcium carbonate and dilute hydrochloric acid.
(b) By upward displacement of air.
(c) $C a C O_{3} + 2 H C l ⟶ C a C l_{2} + H_{2} O + C O_{2}$
(d) Dilute sulphuric acid reacts with calcium carbonate. But it is not used because the calcium sulphate which is formed during the reaction is insoluble in water. It covers the marble chips and stops the reaction.

$C a C O_{3} Calcium carbonate + H_{2} S O_{4} dil. Sulphuric acid ⟶ C a S O_{4} Calcium sulphate + H_{2} O Water + C O_{2} Carbon dioxide$

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

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