Question

Mention important physical properties of alkynes​

Answer 1

The properties of alkynes pretty much follow the same pattern of those of alkanes and alkenes.
Alkynes are unsaturated carbon that shares a triple bond at the carbon site.
All alkynes are odourless and colourless with the exception of ethylene which has a slight distinctive odour.
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Answer 2

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Physical properties of alkynes :

(1) Similar to alkanes and alkenes, lower alkynes namely first three members are gases, the next eight members are liquids and higher hamologues are solids.

(2) Except acetylene, all alkynes are odourless. Acetylene has characteristic smell.

(3) Alkynes have slightly higher boiling points than corresponding alkanes and alkenes. The melting point and boiling point increase with increase in molecular mass.

(4) They are insoluble in water, less dense than water, but are soluble in organic solvents like benzene, ether, etc.