Question

Select the correct answer from the choices A, B, C, and D which are given. Write only the letter corresponding to the correct answer.

What happens in a decomposition reaction?

• A. One compound splits apart into multiple pieces
• B. Water and carbon dioxide are produced
• C. Different types of substances combine to make the product
• D. None of the above

Answer 1

The correct option is A

One compound splits apart into multiple pieces

Explanation for correct option:

Option A

Decomposition reaction:

• When the molecules of one substance split into two or simpler substances, the reaction is called a decomposition reaction.
• These reactions are brought about in the presence of an external agent such as heat, light, and electricity.

For example:

$2{\mathrm{KClO}}_{3\left(\mathrm{s}\right)}\stackrel{∆}{\to }2{\mathrm{KCl}}_{\left(\mathrm{s}\right)}+3{\mathrm{O}}_{2\left(\mathrm{g}\right)}$

Therefore, option A is correct.