Question

Differenr between combination reaction and decomposition reaction

Answer 1

Explanation:

Hey friend !

Combination reaction:-

It is a chemical reaction in which two or more reactants combine with each other to form a new single product.

It releases  heat during the chemical reaction.

This means that it is exothermic .

Examples :-

1) 2H₂ + O₂ ---->2H₂O    

2) 2Mg + O₂ --->2MgO

Decomposition reaction:-

It is a chemical reaction in which one reactant  breaks down into simpler compounds.

It absorbs heat from the surroundings during the chemical reaction.

IN other words , it is endothermic .

Examples :-

CaCO₃ ===> CaO + CO₂

2H₂O ===> 2H₂ + O2

Answer 2

Explanation:

Combination reaction:-The reaction in which two or more elements or reactants react together to form a single product with entirely different properties is called combination reaction. Decomposition reaction:-The reaction in which single element breaks down to

give two or more products is called decomposition reaction.

hope it will help you....