Question

chemical properties of alkane

Answer 1

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Allanes exist as solid liquid or gases.. Branched alkanes normally exhibit lower boiling points than unbranched alkanes of the same carbon content. This occurs because of the greater van der Waals forces that exist between molecules of the unbranched alkanes. These forces can be dipole‐dipole, dipole‐induced dipole, or induced dipole‐induced dipole in nature. The unbranched alkanes have greater van der Waals forces of attraction because of their greater surface areas.

Solid alkanes are normally soft, with low melting points. These characteristics are due to strong repulsive forces generated between electrons on neighboring atoms, which are in close proximity in crystalline solids. The strong repulsive forces counterbalance the weak van der Waals forces of attraction.

Answer 2

Answer:

• Alkanes are saturated compounds.

• They are very less reactive, and behave inert towards acid, bases, oxidising and reducing agents at ordinary temperature.

• They react with halogens or nitric acid when heated.

• They mainly exhibit substitution reactions like halogenation and nitration.

• They also undergo thermal decomposition or pyrolysis and combustion.