Isomerisation

Isomerisation: in which a chemical compound undergoes a structural rearrangement without any change in its net atomic composition.

Isomerisation is the process by which one molecule is transformed into another molecule which has exactly the same atoms, but the atoms are rearranged e.g. A-B-C → B-A-C (these related molecules are known as isomers).

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Examples of exothermic reactions

An exothermic reaction is a chemical reaction that releases energy in the form of heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation:

reactants → products + energy

Examples of exothermic reactions

• Combustion reactions of fuels
• Neutralization reactions such as direct reaction of acid and base
• Adding concentrated acid to water
• Burning of a substance
• Adding water to anhydrous copper(II) sulfate
• The thermite reaction
• Reactions taking place in a self-heating can based on lime and aluminum
• The setting of cement and concrete
• Many corrosion reactions such as oxidation of metals
• Most polymerisation reactions
• The Haber-Bosch process of ammonia production

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Sodium Cyanide: A fatal substance.

It is a highly toxic compound, also known as sodium salt of hydrodyamic and cyanogran.


Immediate medical attention is required in the event of cyanide poisoning, as it is quickly fatal.


It is used in extracting gold, silver, copper, poison to control indoor pests.


It irritates and severely damages tissues of eyes, skin, respiratory tract and the gastroinstestial tract.


Inhalation causes headaches, dizziness, convulsion, vomiting, unconsciousness, redness of eyes and skin, severe deep burns and nausea.

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