Hydrogenation of the carbon-carbon double bond occurs when and alkene reacts with what?

Answer 1

Hydrogenation occurs when hydrogen gas is add up to alkene.alkene react with hydrogens(with catalyst),halogens,hydrogen hallides,water(with catalist).

Answer 2

the question is relational with a reaction of addition, when a double bond is broken, remaindering two electron unshared to form a single bond, The hydrogenation is a chemical reaction of hydrogen with another substance, generally an unsaturated organic compound, and usually under the influence of temperature, pressure, and catalysts.
one kind a addition reaction is called HYDROGENATION REACTION, because the hydrogen is added to alkene, after the double bond is broken.
these reaction need a special conditions, some like the use of catalyst, (Raney Ni, or Pt)
the result of reaction is a alkene, because only have a single bonds C-H
excuse me for my English, but im only help you
juan francisco olivares gonzales
lima peru

Answer 3

Pentene Alkanes (Pentane is a 5 carbon alkane) have unmarried carbon-carbon bonds Alkenes (Pentene is a 5 carbon alkene) have double carbon=carbon bonds. do not study others. Alkenes also decolourise bromine. meth = a million carbon eth = 2 carbons prop= 3 carbons yet = 4 carbons pent= 5 (i imagine you get the photo) hex = 6 hept = 7 oct = 8 non= 9 dec= 10 eg ethane, methane, propane methene, propene, there is not any methene as carbon=carbon double bonds require to carbons and the call relies upon on the type of carbons. Sorry meant methene, replaced it.

Answer 4

With Hydrogen, when the mixture of the alkene vapour & hydrogen is passed over finely divided Ni catalyst at 300 deg C.
The reaction may also be carried out with raney Nickel or palladium or platinum catalyst at a comparatively lower temp.

Answer 5

Hydrogenation processes use a catalyst, often platinum, with heat and under pressure.

Answer 6

when the alkene reacts with hydrogen catalysed by nickel etc