Question

define combination reaction ​

Answer 1

Answer:

When 2 or more reactants combine together or react with each other to form a single product is known as combination reaction...

example:-

2H2+ O2--->2H2O

Hope it may help you....

Answer 2

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☛ Those reactions in which two or more substance combine to form a single substance are called combination reactions.

☛ In, combination reactions two or more elements can combine to form a compound

• Two or more compounds can combine to form a new compound.

• An element and a compound can combine to form a new compound.

☛ For example :- Magnesium and oxygen combine when heated to form magnesium oxide.

$\rm\:2Mg\:(s)\:+\:O_2\:(g)\:\xrightarrow{\text{combination}}\:2MgO\:(s)$

In this reaction,two element , magnesium and oxygen are combine to form a single compound,magnesium oxide so, this is combination reactions,then combination reactions take place with oxygen to form magnesium oxide.