Free radical substitution with a halogen - needs UV light.
Alkane → Haloalkane
Hydrogenation at 150 degrees Celsius with hydrogen and a nickel catalyst.
Alkene → Alkane
Electrophilic addition of a hydrogen halide.
Alkene → Haloalkane
Nucleophilic substitution - heat under reflux with aqueous NaOH.
Haloalkane → Alcohol
Hydrolysis - NaX and H2SO4.
Alcohol → Haloalkane
Hydration with steam and H2SO4.
Alkene → Alcohol
Dehydration with Al2O3 or a concentrated acid
Alcohol → Alkene
Distillation of primary alcohol with Potassium dichromate (K2Cr2O7) and sulphuric acid (H2SO4)
Alcohol → Aldehyde
Heat primary alcohol under reflux with Potassium dichromate (K2Cr2O7) and sulphuric acid (H2SO4)
Alcohol → Carboxylic acid
Heat secondary alcohol under reflux with Potassium dichromate (K2Cr2O7) and sulphuric acid (H2SO4)
Alcohol → Ketone