Question

Explain the reactions which requires energy for product formation with the help of equations

Answer 1

Answer:

(1.) Decomposition on heating

Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide

CaCO

3

→CaO+CO

2

(2.) Decomposition by light

Silver chloride decomposes to silver and chlorine in presence of sunlight

2AgCl→2Ag+Cl

2

(3). Decomposition by electricity

Water on electrolysis gives hydrogen and oxygen

2H

2

O→2H

2

+O

2

Answer 2

Decomposition reactions require energy either in the form of heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity.