Explanation:
Combination reaction
It is a reaction in which some substances or reactants combine to form a single substance or we can all it as single product .
Like : A + B --> C+D
This combination can be between a element and a element like :
H₂ +O₂--> H₂O
It can be between element and a compound like :
SO₂ + O₂---> SO₃
It can be between a compound and a compound like :
H₂O + CO₂---> H₂CO₃
In the above asked question , the combination is between Cu and a sulphur that is element and a element that is :
Cu + S ---> CuS
(copper sulphide )
