Question

Give one example of each decomposition due to heat ,light,electricity class 10

Answer 1

A decomposition reaction is a type of chemical reaction in which a single compound breaks down into 2 or more elements or new compounds.

Examples-due to heat

1) calcium carbonate decomposes in calcium oxide & carbon dioxide when heated.

2)When heated strongly potassium chlorate decomposes into potassium chlorite and oxygen.

Examples - Due to light

1) silver chloride decomposes into silver and chlorine .

2) hydrogen peroxide decomposes into water and oxygen.

ex- due to electricity.

1)water decomposes into hydrogen and oxygen.

2)sodium chloride decomposes into sodium and chlorine.

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Answer 2

ANSWER:-

◆ The reaction in which a single substance decomposes to give two or more substances is called DECOMPOSITION REACTION.

◆ There are three type of decomposition reaction

● Thermal Decomposition Reaction
● Electricity Decomposition Reaction
● Sunight Decomposition


1) THERMAL DECOMPOSITION REACTION : When the decomposition reaction carried by heat.

Example = 2FeSO4 --heat-- Fe2O3 + SO2 + SO3

2) ELECTRICITY DECOMPOSITION REACTION : When the decomposition reaction carried by electric current.

Example = 2H2 + O2 --electric current-- H2

2) SUNLIGHT DECOMPOSITION REACTION : When the decomposition reaction carried by sunlight.

Example = 2AgCl --sunlight-- 2Ag + Cl2


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