AQA · Chemistry · 8462
GCSE Chemistry: Reactions of alkenes
Organic chemistry · AQA GCSE Chemistry (8462), specification point 4.7.2.2. Cards are generated from the exam board's own specification for "Reactions of alkenes", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
10 flashcards · Free to study · No account needed
Study this deck
Preparing your cards…
All questions and answers
Read through the full deck, or practise recalling each answer above.
What functional group defines an alkene?
Show answer
The carbon-carbon double bond, C=C.
Alkenes are hydrocarbons with the functional group ?.
Show answer
C=C
Why do alkenes burn in air with smoky flames?
Show answer
Because of incomplete combustion.
What determines the reactions of an organic compound?
Show answer
The generality of reactions of its functional group — compounds with the same functional group react in the same way.
What type of reaction do alkenes undergo with hydrogen, water and halogens?
Show answer
Addition reactions — atoms are added across the C=C double bond.
What happens to the C=C double bond of an alkene in an addition reaction?
Show answer
It becomes a single carbon-carbon bond, as atoms add across it.
In an addition reaction, atoms add across the alkene's double bond so that it becomes a ? carbon-carbon bond.
Show answer
single
Name three types of substance that undergo addition reactions with alkenes.
Show answer
Hydrogen, water and halogens (e.g. chlorine, bromine, iodine).
How does the combustion of alkenes compare to that of other hydrocarbons?
Show answer
Alkenes react with oxygen in the same way as other hydrocarbons, but tend to burn with smoky flames due to incomplete combustion.
What kind of compound is produced when an alkene reacts with hydrogen?
Show answer
A saturated hydrocarbon (an alkane) — the C=C becomes a C–C single bond with hydrogen atoms added to each carbon.
Want to create your own cards? Create a free account. AI generation uses credits.