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Question

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


A

Splitting of water into hydrogen and oxygen

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B

Carbon completely burnt in oxygen yields carbon dioxide

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C

Calcium oxide combined with water gives calcium hydroxide.

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D

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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