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Chemical Equilibrium

Chemical equilibrium is a dynamic state at which the rate of forward reaction is equals to  rate of backward reaction.At this point  the number of reactant molecules converting  into products  and converting product  molecules into reactants are the same.

There are two types of chemical equilibrium:

Homogeneous equilibrium:

The reactants and the products of chemical equilibrium are all in the same phase. Homogeneous equilibrium is further divided into two types  . In the first type the reactions in which the number of molecules  of a product is equal to the number of molecules of reactants.  Reactions in which the number of molecules of the product  is not equal to the total number of reactant molecules.

Heterogeneous  equilibrium:

In this type reactants and products  of chemical  equilibrium   are present in different phases

There are several factors like temperature, pressure and concentration of the system which affect equilibrium. Some important factors affecting chemical equilibrium are discussed below:

  • Change in concentration 
  • Change in pressure 
  • Change in Temperature 
  • Effect of catalyst 
  • Effect of addition of inert gas

Chemical Equilibrium Questions


Question 1: Chemical equilibrium at which rate of forward reaction ___________ to rate of backward reaction

(a) Not equal

(b) Equals to

(c) Not similar

(d) No relation

Solution : Chemical equilibrium at which rate of forward reaction is equals to the rate of backward reaction.

Answer : (b(

Question 2: In chemical reaction represented as Backward reaction is the reaction in ________ converts to __________.

(a) Reactants to products

(b) Products to Reactants

(c) Substrates to intermediates

(d) All the above

Solution : In chemical reaction  the backward reaction in which products get converted into reactants.

Answer : (a)


Question 3: Chemical equilibrium is ________ state

(a) Dynamic state

(b) Static state

(c) Both dynamic and static state

(d) All the above

Solution : Chemical equilibrium is dynamic state

 Answer : (a)


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