Why are decomposition reactions called t | Class 10 Science Chapter Chemical reaction and Equation, Chemical reaction and Equation NCERT Solutions

Question:

Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.

Answer:

In decomposition reaction, a single reactant breaks down into two or more simpler product, while in combination reaction two or more reactant combine to form a single product. Therefore decomposition and combination reaction are opposite.

Example of decomposition :

(i)    2FeSO4(s)                    --Heat→    Fe2O3(s)      +    SO2(g)    +    SO3(g)
       Ferrous  sulphate                         Ferric oxide
       

(ii)   CaCO3(s)    --Heat→    CaO(s)    +    Co2(g)
       Lime stone                  Quick lime


Example of combination :

(i)   CaO(s)    +    CO2(g)                 →      CaCO3(s)
     Quick lime     Carbon dioxide               Lime stone
                           

(ii)   Burning of coal →

      C(s)    +    O2(g)    →    CO2(g)


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Comments

  • Tanish kapasia
  • 2021-05-07 10:52:59

good answer and thank u


Comment(s) on this Question

Welcome to the NCERT Solutions for Class 10 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 4 , Question 11: Why are decomposition reactions called the opposite of combination reactions? Write equations for th....