Question

differentiate between combination reaction and displacement reaction.​

Answer 1

Combination reaction (also known as a synthesis reaction) is a reaction where two or more elements or compounds (reactants) combine to form a single compound

Answer 2

Combination reaction:

• Two or more substances combine together to form a single products.
• A + B→AB.
• Heat is released during the chemical reaction, exothermic in nature.
• Heat, light, electricity and catalyst may not be required to completed the reaction.
• eg: 2Mg + O2→ 2MgO

Displacement reaction:

• A single reactant break down or decomposes into two or more simpler products.
• AB→ A + B

• Heat is absorbed from the surroundings during chemical reaction, endothermic in nature.
• Heat, light, electricity and catalyst may be required to completed the reaction.

• EG: 2Pb(NO3)2 → 2PbO + 4NO2+ O2