Question

9. (a) What is a decomposition reaction ?
(b) Decomposition reactions can occur by (i) heat
(ii) electricity and (iii) sunlight.
Give two balanced equations for each.​

Answer 1

Explanation:

when are reactance is decomposed into two or more products then it is called as decomposition reaction .

decomposition reaction can be occurred by the heat electricity and some light by the process of electrolysis, photolysis, thermolysis.

Heat

CaCO

3

=CaO+CO

2

FeSO

4

→Fe2O

3

+SO

2

+SO

3

ii) Electricity

2H

2

O→H

2

+O

2

iii) Light

2Agbr

→

sunlight

2Ag+Br

2

2AgCl(S)

→

Sunlight

2Ag(s)+Cl

2

(l)

Answer 2

Answer[ a] Decomposition Reaction. A reaction in which a compound splits up into two or more simpler substances is known as a decomposition reaction. ... Sulfur dioxide and sulfur trioxide gases are also released in this reaction. They have a pungent and rotten smell due to the burning of sulfur

Answer[ b]option (i) heat is ur answer

explanation: A decomposition reaction occurs when one reactant breaks down into two or more products. It can be represented by the general equation: AB → A + B. In this equation, AB represents the reactant that begins the reaction, and A and B represent the products of the reaction.        Answer[c] oxygen, molecules is ur answer