Alkenes can be freed from alkene impurities by treating with concentrated solution of the

Alkenes can be preapred by:

Alkene can be formed from carbonium ion by

Alkyne can be reduced to alkenes by hydrogenation in presence of

Alkynes can be reduced to alkenes hydrogenation in presence of:

Alkene is prepared from alcohol by

An alkene may be formed from a carbocation if

Alkenes can be converted into aldehydes and ketones by an acidified aqueous solution of PdCI_2 and CuCl_3 . This process is known as