Question

write an equation each decomposition reactions where energy is supplied in the form of heat, light or electricity?

Answer 1

ANSWER:

● DECOMPOSITION REACTION : The reaction in which single substance decomposes to give two or more substances is called Decomposition Reaction.

● Decomposition Reaction can be of three types;

◆ Thermal Decomposition
◆ Electrolytic Decomposition
◆ Sunlight Decomposition

● THERMAL DECOMPOSITION: When the decomposition carried by heating is called thermal decomposition.

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

● ELECTROLYTIC DECOMPOSITION: When the decomposition carried by electricity is called electrolytic decomposition.

Example - 2H2 + O2 --- H2O

● SUNLIGHT DECOMPOSITION: When the decomposition carried by sunlight is called sunlight decomposition.

Example - 2AgCl --- 2Ag + Cl2


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Answer 2

Decomposition reaction requiring heat is known as thermal decomposition , CaCO3--------->CaO + CO2. Decomposition reaction requiring light is known as photo chemical decomposition reaction , 2AgCl-------2Ag + Cl2