Question

mostly asked ecamples of combination reactions?

Answer 1

Yes but do both to be on the safer side and reactions can come from anywhere any book

Answer 2

A combination reaction is one in which two or more reactants combine to form a single product.

Examples:

Formation of calcium oxide by the combination elements calcium and oxygen.

2Ca + O2 → 2CaO

Formation of ammonia by the combination of elements nitrogen and hydrogen.

N2 + 3H2 → 2NH3

Reaction of calcium oxide in water to form calcium hydroxide

CaO + H2O  → Ca(OH)2

Formation of sulphur trioxide by the combination of sulphur dioxide and oxygen.

2SO2 + O2 →  2SO3