reaction is one in which two or more reactants combine to form
a single product.
Combustion of coal and reaction of calcium
oxide with water
reactions are those in which a substance splits into two or more simpler substances.
decomposition of calcium carbonate,
photolysis of silver
2AgCl --------> 2Ag +Cl2
Single displacement reaction is
the one in which one element substitutes or displaces another element in a compound to give new compound.
The reaction of magnesium with copper chloride
Reaction in which hydrogen ions of an acid react with hydroxide ions of a base to form water is an neutralization
The reaction of hydrochloric acid with sodium
A double displacement reaction involves exchange of ions between
reaction of magnesium oxide with calcium sulphide.
Combustion reaction is
the burning of a substance in the presence of oxygen, resulting
in the release of energy.
Combustion of ethylene gas.
Oxidation reaction involves the addition of oxygen or the removal of hydrogen from a
substance. Rusting and rancidity are two examples of oxidation
· Coating iron articles with enamel, paint or red lead oxide prevents rust.
· Addition of an anti-oxidant such as butylated
hydroxy anisole (BHA) and butylated hydroxy toluene (BHT)
Packing food in nitrogen
gas prevents oxidation of food.
Reduction reaction involves addition of hydrogen or removal of oxygen from a
substance. Photosynthesis is a reduction reaction.
Oxidation and reduction
reactions occurring together are known as redox reactions.
Chemical reactions in
which energy is released are known as exothermic reactions and
those which involve absorption of energy are known as endothermic