Question

Decomposition reactions require energy either in the form of heat,or light or electricity for breaking down the reactant.Write one equation each for decomposition reactions where energy is supplied in the form of heat,light and electricity. ❤❤❤❤❤❤❤Good morning
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Answer 1

Explanation:

Decomposition reaction--

"The reaction in which a single bigger compound decomposes to give two or more smaller molecules."

It is of three types--

1. Thermal Decomposition Reaction
2. Electrolytic Decomposition Reaction
3. Photolytic Decomposition Reaction

The examples of each types are as follows--

Thermal--

• 2Fe(OH)3--------->Fe2O3 + 3H2O
• CaCO3(s)--------->CaO(s) + CO2(g)

Electrolytic--

• 2H2O(l)----------->2H2(g) + O2(g)
• 2NaCl ------------>2Na + Cl2

Photolytic--

• 2H2O2(l)---------->2H2O(l) + O2(g)
• 2AgBr(s)---------->2Ag(s) + Br2(g)

Answer 2

there are some metals or elements which are less reactive,so to make them active to react we have to supply heat , light or electricity.

for example,to iron requires hest to react with water

Fe+H2O>>>>Fe(OH)3+H2

hope it helps you