Q13 of 33 Page 22

Balance the following chemical equations and identify the type of chemical reaction.

In the reaction oxygen molecules is not balanced on reactant and product side.

2H2O2→ H2O + O2


Now there are four molecules of hydrogen on reactant side and only two molecules at product side. So total balanced reaction is as follows:


2H2O2→ 2H2O + O2


It is photolysis reaction as hydrogen peroxide is decomposed in the presence of ultraviolet light to give water and oxygen.


More from this chapter

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13

Balance the following chemical equations and identify the type of chemical reaction.

TiCl4(l) + Mg(s) → Ti(s) + 2MgCl2(s)

 13

Balance the following chemical equations and identify the type of chemical reaction.

CaO(s) + SiO2(s) → CaSiO3(s)

 14

When a green iron salt is heated strongly, its colour finally changes to black and odor of burning sulphur is given out.

a. Name the iron salt.


b. Name the type of reaction that takes placed during the heating of iron salt.


c. Write the balanced chemical equation for the reaction involved.

 15

A,B and C are three elements which undergo chemical reactions according to the following equations.

A2O3 + 2B → B2O3 + 2A


3CSO4 + 2B → B2(SO4)3 + 3C


3CO + 2A → A2O3 + 3C


Answer the following questions with reasons.


a. Which element is the most reactive?


b. Which element is the least reactive?


c. What is the type of reactions listed above?