How could you prepare a sample of oxygen gas in the laboratory?

Heating potassium chlorate and lead (IV) oxide

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Dissolving marble chips in acid

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Reacting zinc with dilute sulphuric acid

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Treating potassium metal with water

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Solution

The correct option is A
Heating potassium chlorate and lead (IV) oxide

Heating potassium chlorate and lead (IV) oxide

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Similar questions

Name the following:
(a) Products obtained by dissolving sulphur dioxide and chlorine in water.
(b) The catalyst used in the contact process.
(c) Solution obtained by dissolving sulphur trioxide in 98% sulphuric acid.
(d) Products obtained by treating zinc with dilute sulphuric acid.
(e) Products obtained by treating ferrous sulphide with dilute sulphuric acid.
(f) The precipitate obtained by treating aqueous lead nitrate with dilute sulphuric acid.
(g) The precipitate obtained by treating aqueous barium chloride with dilute sulphuric acid.
(h) Gases obtained by treating carbon with hot concentrated sulphuric acid.
(i) The property used to prepare HCl and HNO₃ from H₂SO₄.

Q. Give balanced equation:
(a) Dilute sulphuric acid reacts with Aluminium powder
(b) Potassium carbonate reacts with hydrochloric acid
(c) Potassium hydroxide reacts with nitric acid
(d) Zinc reacts with sodium hydroxide solution

Q. How much quantity of zinc in grams will have to be reacted with excess of dilute HCl solution to produce sufficient hydrogen gas for completely reacting with the oxygen obtained by decomposing

5.104

g of potassium chlorate?

Give reason for the following :

(a) Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilute sulphuric acid.

(b) Potassium and sodium are not used fro reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen.

Q. What is the change in oxidation state of chromium when potassium dichromate is treated with dilute sulphuric acid?

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How could you prepare a sample of oxygen gas in the laboratory?

The correct option is A Heating potassium chlorate and lead (IV) oxide Heating potassium chlorate and lead (IV) oxide

The correct option is A
Heating potassium chlorate and lead (IV) oxide

Heating potassium chlorate and lead (IV) oxide