Advertisement Remove all ads

Write One Equation Each for Decomposition Reactions Where Energy is Supplied in the Form of Heat, Light Or Electricity - Science

Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads

 Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

Advertisement Remove all ads

Solution 1

(a) Thermal decomposition reaction (Thermolysis)

Decomposition of potassium chlorate: When heated strongly, potassium chlorate decomposes into potassium chloride and oxygen. This reaction is used for the preparation of oxygen.

  2KClO3+Heat2KCl+3O2

 

(b) Electrolytic decomposition reaction (Electrolysis)

Decomposition of sodium chloride: On passing electricity through molten sodium chloride, it decomposes into sodium and chlorine.

2NaCl`"electricity"/`>2Na+Cl2

 

(c) Photodecomposition reaction (Photolysis)

Decomposition of hydrogen peroxide: In the presence of light, hydrogen peroxide decomposes into water and oxygen

2H2O`"sunlight"/`>2H2O+O2

 

Solution 2

CaCO3(s) `"heat"/`>CaO(s)+CO2(g)

2AgCl(s) `"sunlight"/`>2Ag(s)+Cl2(g)

2H2O(l)`"electricity"/`>2H2(g)+O2(g)

Solution 3

(a) Decomposition reaction where energy is supplied in the form of heat:
     CaCO3 (s) → CaO (s) + CO2 (g)

(b) Decomposition reaction where energy is supplied in the form of light:
     2AgCl (s) → 2Ag (s) + Cl2 (g)

(c) Decomposition reaction where energy is supplied in the form of electricity:
     2H2(l) → 2H2 (g) + O2 (g)

Concept: Types of Chemical Change or Chemical Reaction - Decomposition Reactions
  Is there an error in this question or solution?

APPEARS IN

NCERT Class 10 Science
Chapter 1 Chemical Reactions and Equations
Q 12 | Page 16
Lakhmir Singh Class 10 Chemistry (Science)
Chapter 1 Chemical Reactions and Equations
Q 13 | Page 45
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×