Question

Give one example each of the various kinds of decomposition reactions.​

Answer 1

$\huge{\underline{\sf{Question :-}}}}$

Give one example each of the various kinds of decomposition reactions.

$\huge{\underline{\sf{Answer :-}}}}$

There are three types of decomposition reactions. They are:

• Thermal decomposition reactions.
• Electrolytic decomposition reactions.
• Photo decomposition reactions.

The various kinds of decomposition reactions with examples are given below:

➻ Thermal decomposition reactions are usually endothermic, since energy in the form of heat is required to break the bonds of the more complex molecule.

⚬ Example: CaCO3 → CaO + CO2.

When heated, calcium carbonate decomposes into calcium oxide and carbon dioxide.

➻ Electrolytic decomposition reactions occur when an electric current is passed through an aqueous solution of a compound.

⚬ Example: 2H2O → 2H2 + O2.

Water decomposes into hydrogen and oxygen in the presence of an electric current.

➻ Photo decomposition reactions occur in the presence of light (photons).

⚬ Example: 2AgCl + sunlight → 2Ag + Cl2.

Silver chloride decomposes into silver and chlorine in the presence of sunlight.

Extra Information

➜ Definition of decomposition reaction:

A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or products.

The general format of a decomposition reaction is : AB → A + B, where AB is the reactant and A & B are the product molecules.

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