Question

Write one equation each for decomposition reaction in which energy is supplied in the form of heat, light and electricity ?

Answer 1

When a single reactant break down into two or more products. Such type of reaction is known as Decomposition reaction.

Decomposition reaction is of three types.

• Thermal decomposition reaction
• Photo decomposition reaction
• Electric decomposition reaction

Calcium carbonate on heating decomposes into Calcium oxide and carbon-dioxide.

The following reaction will takes place-

$\sf{CaCO_3\:\xrightarrow{\text{Heat}}\:CaO\:+\:CO_2}$

The above reaction is an example of Thermal Decomposition Reaction.

Silver chloride on exposure to sunlight decomposes into silver and chlorine gas.

The following reaction will takes place-

$\sf{2AgCl \xrightarrow{Sunlight}2Ag+Cl_2}$

Silver chloride is white in colour but after decomposition silver becomes grey in colour. This reaction is used in black and white photography.

The above reaction is an example of Photo Decomposition Reaction.

When electric current is passed through water, it decomposes water into oxygen and Hydrogen gas.

The following reaction will takes place-

$\sf{2H_2O\:\xrightarrow{\text{electricity}}\:2H_2\:+\:O_2}$

The above reaction is Electric Decomposition Reaction.

Answer 2

Question :–

Write one equation each for decomposition reaction in which energy is supplied in the form of heat, light and electricity ?

Answer :–

✒️ Decomposition Reaction :–

✏️ It is a type of a chemical reaction.

✏️ In decomposition reaction a single compound break-down into two or more elements or a new compound.

✏️ These reactions (decomposition reaction) involve an energy sources which is :–

1. Heat
2. Light
3. Electricity.

✏️ These energies breaks the bonds of the compounds.

✒️ Types of Decomposition Reaction :–

1. Thermal decomposition reaction
2. Photo decomposition reaction
3. Electric decomposition reaction

✒️ Equations :–

⓵ One equation in the form of heat for decomposition reaction in which the energy is supplied :–

$\red{ CaCO_{3} \implies CaO + CO_{2}}$

⓶ One equation in the form of light for decomposition reaction in which the energy is supplied :–

$\red{2AgCl \: (s) \implies 2Ag(s) + Cl_{2} (g)}$

⓷ One equation in the form of electricity for decomposition reaction in which the energy is supplied :–

$\red{2H_{2} O \implies 2H_{2} + O_{2}}$

The above reaction which I show above is a decomposition reaction⤴️