Question

Difference between combination and decomposition reaction in tabular form

Answer 1

Combination reaction:A combination reaction (also known as synthesis reaction) is a reaction where two or more elements or compounds (reactants) combine to form a simple compound ( product). Such reaction may be represented by euation of the following form :X+Y=XY. Decomposition reaction :A decomposition reaction is a type of chemical reaction in which a single compound is breaks down into two or more elements or new compounds .

Answer 2

Answer:

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