3 important Physical Properties of Alkynesare :-
1. Alkynes have physical properties similar to alkanes and alkenes. Lower alkynes upto four carbon atoms are gases, those containing five to thirteen carbon atoms are liquids while higher alkynes are solids.
2. The boiling points and melting points increase with increase in the number of carbon atoms.
3. Alkynes are sparingly soluble in polar solvents such as water but are readily soluble in organic solvents such as benzene, ether, acetone, etc.