Question

In two or more complete sentences, compare combination reactions to decomposition reactions.

Answer 1

Combination: Joining of two different substances to form a more complex substance.

Decomposition: Breaking of a compound into two or more products.

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Answer 2

Explanation:

When in a chemical reaction either two or more number of elements or compounds combine together to result in the formation of a single compound then they are known as combination reactions.

For example, $2Na(s) + Cl_{2}(g) \rightrarrow 2NaCl(s)$

On the other hand, when in a chemical reaction a single compound is able to produce two or more number of products then its is known as a decomposition reaction.

For example, $CuCl_{2} \rightarrow Cu + Cl_{2}$