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Which of the following statements is true about combination reaction?
Question

Which of the following statements is true about combination reaction?

A.

A single reactant changes to a single product.

B.

Only two elements react to give the products.

C.

A single product is formed from two or more reactants.

D.

Only two products are formed.

Correct option is C

The correct answer is: (C) A single product is formed from two or more reactants.
A combination reaction is a chemical reaction in which two or more reactants combine to form a single product. These reactions are also known as synthesis reactions.
General Form of Combination Reaction:
A+B→ABA + B \rightarrow ABA+BAB
Examples:

Reaction of Hydrogen and Oxygen:

2H2+O22H2O 2H_2 + O_2 \rightarrow 2H_2O

Formation of Calcium Carbonate:

Two reactants (calcium oxide and carbon dioxide) combine to form a single product (calcium carbonate).

CaO+CO2→CaCO3CaO + CO_2 \rightarrow CaCO_3CaO+CO2CaCO3CaO+CO2→CaCO3​​

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