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At constant temperature the volume occupied by a definite mass of a gas is inversely proportional to the applied pressure.

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Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.

Acyl Group

Compound derived from a carbonic acid by replacing the --OH group with a halogen (X), usually --Cl, general formula is O R--C--X.

Diamagnetism

Weak repulsion by a magnetic field.

Nitrogen Cycle

The complex series of reactions by which nitrogen is slowly but continually recycled in the atmosphere, lithosphere and hydrosphere.

 

Band Theory of Metals

Theory that accounts for the bonding and properties of metallic solids.

Oxidation

An algebraic increase in the oxidation number, may correspond to a loss of electrons.

Spectator Ions

Ions in a solution that do not participate in a chemical reaction.

Salt and its use in everyday life

Cooking salt is a product that is available in every kitchen, and it’s not as simple as it seems. The history of this product shows that it was valued like gold.

Copper

Discovered : known to ancient civilisations
Origin : The name is derived from 'Cuprum', the Latin name for Cyprus.

Foam

Colloidal suspension of a gas in a liquid.