An alkene,on ozonolysis,gives formaldehyde and acetaldehyde. The alkene is:

Conversion of cyclohexene to cyclohexanol can be conveniently achieved by

The disappearance of the characteristic purple colour of $KMnO_4$ in its reaction with an alkene is the test for unsaturation. It is known as

The major product of the reaction is:

In methyl alcohol solution,bromine reacts with ethylene to yield $BrCH_2CH_2OCH_3$ in addition to $1, 2-dibromoethane$ because:

Baeyer's reagent is used for the detection of