Chambers's Twentieth Century Dictionary. 1  n Maxim maksâ²im a general principle, serving as a rule or guide: a pithy saying: a proverb.  n Maxim maksâ²im often put for Maxâ²im-gun, an automatic machine-gun capable of firing as many as 620 rounds per minute, and of accurate shooting up to 3000 yards.
THE HYDROGENATION OF ALKENES. This page looks at the reaction of the carbon-carbon double bond in alkenes with hydrogen in the presence of a metal catalyst. This is called hydrogenation. It includes the manufacture of margarine from animal or vegetable fats and oils. Hydrogenation in the lab. The hydrogenation of ethene.
Hydrocarbons are compounds made from carbon and hydrogen atoms joined by covalent bonds. Alkanes are saturated-they have only single bonds. Alkenes have a double bond-they are unsaturated. Alkenes react with brown bromine water and decolourise it, but alkanes do not.Alkenes can act as monomers. Under high pressure and in the presence of a catalyst many monomer molecules join together to make polymer molecules.lkanes are saturated-they have only single bonds. Alkenes have a double bond-they are unsaturated. Alkenes react with brown bromine water and decolourise it, but alkanes do not.