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.
1. Alkanes-Are saturated hydrocarbons that therefore contain only hydrogen and carbon atoms bonded to each other, and typically follow the chemical formula C n H 2n+2. A common example is paraffin.2. Alkenes-These unsaturated hydrocarbons are molecules that contain at least one carbon-to-carbon double bond.With the chemical formula consisting of molecules of C n H 2n, alkenes are very common in the petrochemical industry; the simplest alkene is ethylene, or ethane.. Alkanes-Are saturated hydrocarbons that therefore contain only hydrogen and carbon atoms bonded to each other, and typically follow the chemical formula C n H 2n+2. A common example is paraffin.