What are the conditions required for the addition of hydrogen to an alkene, and what is the product of this reaction?

The addition of hydrogen to an alkene requires the presence of a catalyst, typically nickel, and occurs at elevated temperatures. The product of this reaction is an alkane, as the double bond in the alkene is converted to a single bond.

This question tests the understanding of the conditions and products involved in the hydrogenation of alkenes, which is a key reaction in organic chemistry. It assesses both recall and comprehension of reaction mechanisms. This response is aligned to Reactions of alkenes because it explains describe the reactions and conditions for the addition of hydrogen, water and halogens to alkenes using the correct AQA GCSE Chemistry organic context. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams.