JAMB - Chemistry (2002 - No. 27)
The reaction of an alkene with hydrogen in the presence of catalyst is
a substitution reaction
an oxidation reaction
a nucleophilic reaction
an addition reaction
Vysvětlení
When an alkene reacts with hydrogen in the presence of a catalyst, the reaction is called hydrogenation.
Hydrogenation is an addition reaction that occurs when hydrogen gas is added to an alkene's double bond in the presence of a metal catalyst. The reaction results in the formation of an alkane, which is a saturated compound.
The reaction is also known as catalytic hydrogenation because a catalyst is required for it to occur. The catalyst lowers the activation energy of the reactants, which increases the reaction rate.