Question

differentiate between double displacement displacement combination and decomposition reaction

Answer 1

Displacement reaction : The reaction in which an element displaces another element from a substance. In displacement reaction one element displaces another element from its compound and takes its place there. Example- Zn+ 2HCl = ZnCl2+ H2

Double displacement : The reaction in which the constituent atoms of the reaction interchange by the decomposition of the two reactants, to produce new compounds are called double displacement reactions.
Example- HCl +NaOH = NaCl + water

A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds. These reactions often involve an energy source such as heat, light, or electricity that breaks apart the bonds of compounds. Example- CaCO3 → CaO+ CO2

A combination reaction is a type of chemical reaction in which two or more reactants combine to form one single product i.e. compound. It is the reverse of decomposition reaction.

Example- H2 + O2 = 2H2O

Answer 2

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Single displacement reactions are reactions where one reactant replaces part of the other.

AB + C → AC + B

Double displacement reactions are reactions where the cations and anions in the reactants switch partners to form products.

AB + CD → AD + CB