(a) Name the chemicals required to prepare hydrogen gas in the laboratory.

(b) Give a balanced chemical equation for the reaction.

(c) Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen.

(d)How is hydrogen gas collected ? Why

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Solution

(a) Granulated Zinc and dil. Hydrochloric acid.
(b) Zn + 2 HCl → ZnCl₂ + H₂ (g)
(c)

(d) Hydrogen gas is collected by the down-ward displacement of water.

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Similar questions

(a) Draw a labelled diagram for the laboratory preparation of hydrogen chloride gas.
(b) Give the balanced equation for the reaction.
(c) Name the drying agent used in drying hydrogen chloride gas.
(d) Phosphorus pentoxide and calcium oxide are good drying agents but they cannot be used to dry hydrogen chloride gas. Why?

For the laboratory preparation of hydrogen, give the following

(a) materials used,

(b) method of collection,

(d) a fully labelled diagram.

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

(b) How will you collect the gas?

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

(i) Draw a labelled diagram and explain the laboratory preparation of hydrogen chloride gas. Give the balanced equations.
(ii) How will you prove that the gas prepared is HCl?
(iii) Name the drying agent used to dry HCl gas.
(iv) How is the gas collected and why?
(v) What are the important precautions?

For the laboratory preparation of hydrogen, give the chemical equation.

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Laboratory Preparation

Standard VIII Chemistry

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(a) Name the chemicals required to prepare hydrogen gas in the laboratory. (b) Give a balanced chemical equation for the reaction. (c) Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen. (d)How is hydrogen gas collected ? Why

(a) Granulated Zinc and dil. Hydrochloric acid. (b) Zn + 2 HCl → ZnCl2 + H2 (g) (c) (d) Hydrogen gas is collected by the down-ward displacement of water.

(a) Name the chemicals required to prepare hydrogen gas in the laboratory.

(b) Give a balanced chemical equation for the reaction.

(c) Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen.

(d)How is hydrogen gas collected ? Why

(a) Granulated Zinc and dil. Hydrochloric acid.
(b) Zn + 2 HCl → ZnCl₂ + H₂ (g)
(c)

(d) Hydrogen gas is collected by the down-ward displacement of water.