Answer the following question:
Answer variants:
At least one double bond
Unsaturated and bromine water decolourises \(-C≡C\)
No colour change in bromine water
\(C_nH_{2n+2}\)
\(C_nH_{2n}\)
\(C_nH_{2n-2}\)
Unsaturated and bromine water does not decolourise
Differentiate the properties of alkanes, alkenes, and alkynes. 
 
i. Alkanes: 
 
General formula:
 
 
 
ii. Alkenes
 
General formula:
 
 
iii. Alkynes:
 
General formula: