We can see here:
Bromine in

Alkanes: No reaction (No color change observed)
Alkenes: Decolorizes bromine solution (from red to colorless)
Alkynes: No reaction (No color change observed)
Baeyer's reagent
Alkanes: No reaction (No color change observed)
Alkenes: Forms a colored complex or precipitate
Alkynes: Forms a colored complex or precipitate
Ammoniacal of

Alkanes: No reaction (No color change observed)
Alkenes: Forms a silver mirror (Silver mirror test)
Alkynes: No reaction (No color change observed)
Ammoniacal of
Alkanes: No reaction (No color change observed)
Alkenes: No reaction (No color change observed)
Alkynes: Reddish-brown or reddish-orange precipitate is formed.
Alkanes are a type of hydrocarbon, which means they consist solely of hydrogen and carbon atoms bonded together in a specific manner.