Alkenes Key Concepts 💡

Front

Alkenes are ________ hydrocarbons. They contain one or more carbon-carbon ______ bonds.

Back

unsaturated double

Front

The functional group of alkenes is the carbon-carbon______ bond.

Back

double

Front

Which molecular formula represents propene?

Back

Front

An addition reaction is a reaction in which an unsaturated organic compound combines with another substance to form a ______ new compound.

Back

single

Front

During hydrogenation, hydrogen is added to an alkene to form an _______.

Back

alkane

Front

During bromination, bromine is added to an alkene. The reddish brown bromine solution turned ________.

Back

colourless

Front

Cracking is the breaking down of long-chain hydrocarbons into _______ molecules.

Back

smaller

Front

Comparing alkanes and alkenes: Both alkanes and alkenes are _________. Alkanes are ________ hydrocarbons but alkenes are ________ hydrocarbons.

Back

Both alkanes and alkenes are hydrocarbons. Alkanes are saturated hydrocarbons but alkenes are unsaturated hydrocarbons.

Front

Alkanes undergo _______ reactions but alkenes undergo _______ reactions.

Back

substitution reactions; alkenes undergo addition reactions.

Front

Comparing alkanes and alkenes Alkanes does ____ react with aq bromine under normal conditions but alkenes _______ bromine.

Back

not decolourise