Which of the following is an example of a decomposition reaction?

Splitting of water into hydrogen and oxygen

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Carbon completely burnt in oxygen yields carbon dioxide

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Calcium oxide combined with water gives calcium hydroxide.

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Oxygen combines with carbon monoxide, and carbon dioxide is formed.

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Solution

The correct option is A
Splitting of water into hydrogen and oxygen

Decomposition is a type of chemical reaction in which a single compound splits into two or more simple substances under suitable conditions. Water splitting into two constituent parts is an example of a typical decomposition reaction. All the other remaining examples of, carbon burning in the presence of oxygen, calcium oxide combining with water, oxygen combining with carbon monoxide are all examples of combination reactions.

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Similar questions

One of the following is an endothermic reaction. This is :

(a) combination of carbon and oxygen to form carbon monoxide

(b) combination of nitrogen and oxygen to form nitrogen monoxide

(d) combination of zinc and hydrochloric acid to form zinc chloride and hydrogen

Write a balanced chemical equation for each of the following :

1. Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.

2. Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

3. Methyl alcohol burns in air to form carbon dioxide and water.

4. Liquid hydrogen peroxide decomposes to give water and oxygen gas.

5. Aluminium hydroxide reacts with sulphuric acid to give ammonium sulphate and water.

6. Aluminium sulphate solution reacts with sodium hydroxide to form a precipitate of aluminium hydroxide.

12 : 16

12 : 32

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