Question

define combination reaction​

Answer 1

Answer:

A combination reaction is a reaction where two or more elements or compounds combine to form a single compound. Such reactions may be represented by equations of the following form: X + Y → XY. The combination of two or more elements and form one compound is called combination reaction. 

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Answer 2

Combination reaction is a chemical reaction in which two compounds reacts to give a single product.

Example:

$\sf{CaO + H_2O-->Ca(OH)_2}$

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