Chemical Reaction

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Overview

The process of breaking old binding force and the formation of new binding force in product is called chemical reaction. This note is about an introduction on chemical reaction.
Chemical Reaction

Chemical Reaction: The process of breaking old binding force of reactants and the formation of new binding force in theproduct is called chemical reaction. It is the process by which one or more substances are arranged to form different substances.

energy-diagram-for-a-catalyzed-exothermic-reaction

Fig 1: Process of chemical reaction

Chemical Equation: The symbolic representation of actual chemical reaction in terms of words or molecular formula is called chemical equation.

Reactants and Products

Reactants: Those chemicals which go under chemical change themselves during chemical reactions are called reactants.

Products: Those chemicals which are formed as a result of chemical reaction are called products.

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Fig: 3(a)

Points to remember

  • In a chemical equation, reactants and products are separated by an arrow (→).
  • Reactants are written in the left side of arrow and products are written on the right hand side of the arrow as in figure 3(a).
  • In the reversible reaction, reactants and products are separated by two way arrow ( ).
Things to remember
  • The process of breaking old binding force and the formation of new binding force in product is called chemical reaction.
  • Those chemicals which go under chemical change themselves during chemical reactions are called reactants.
  • Those chemicals which are formed as a result of chemical reaction are called products.
  • It includes every relationship which established among the people.
  • There can be more than one community in a society. Community smaller than society.
  • It is a network of social relationships which cannot see or touched.
  • common interests and common objectives are not necessary for society.
Videos for Chemical Reaction
Predicting the Products
Writing Chemical Equations
Questions and Answers

The exchange, combustion or decomposition that occurs in the molecules of substances during a chemical change is called chemical reaction. It is the process by which one or more substances are arranged to form different substances.

A catalyst is a substance which changes the rate of a chemical reaction without taking part in chemical reaction itself. An example of negative catalyst is glycerin which decreases the rate of decomposition of hydrogen peroxide and manganese dioxide (MnO2) is an example of positive catalyst which increases the rate of decomposition of hydrogen peroxide.
The names of different type of chemical reaction are: i. Addition and combination reaction ii. Decomposition reaction iii. Displacement reaction iv. Acid-base or neutralization reaction.

The following are the changes occur during a chemical reaction:

  1. Heat, electricity and light.
  2. Pressure
  3. Catalyst
  4. Solution or concentration of the solution.
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