Notes, Exercises, Videos, Tests and Things to Remember on Chemical Reaction
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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.
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: 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.
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: