Which of the following statements about decomposition reactions is true? a) decomposition and combustion reactions are the same thing b) decomposition and single-displacement reactions are the same thing c) decomposition reactions are essentially the opposite of synthesis reactions d) decomposition reactions are essentially the opposite of single-displacement reactions

c) Decomposition reactions are essentially the opposite of synthesis reactions

Explanation:

1. Decomposition is a type of chemical reaction in which one reactant gives two or more than two products.

Example:

2. Combustion is a type of chemical reaction in which fuel is reacted with oxygen to form carbon dioxide and water.

Example:  

3. Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.

Example:

4. Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.

Example:  

Thus synthesis ad decomposition are opposite chemical changes as decomposition is breaking of one reactant to form multiple products and synthesis is formation of one product from multiple reactants.

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