The functional group is the atom or group of atoms responsible for the way a compound reacts.

Unsaturated compounds contain at least one carbon-carbon double covalent bond.

Alkanes are saturated hydrocarbons as they contain only single bonds between carbon and hydrogen atoms.

Isomers are structures with the same molecular formula, but different arrangement of atoms in space.

Alkenes are unsaturated hydrocarbons that contain the C=C functional group.

Alkenes

Chemistry

In the Chemistry of Carbon unit, pupils learned about the structure and bonding of carbon, and its ability to form various compounds.

Reactions of alkenes happen at their functional group. 
Which of the following is the functional group of alkenes?

compounds that contain at least one carbon–carbon double covalent bond

compounds that contain only single covalent bonds

hydrocarbons that contain the C=C functional group

the atom or group of atoms responsible for the way a compound reacts

Match the following key terms to their definitions.

Longer alkenes have lower boiling points than shorter alkenes.

Longer alkenes have higher boiling points than shorter alkenes.

Larger alkenes are less flammable than shorter alkenes.

Longer alkenes are more flammable than shorter alkenes.

Which of the following statements about alkenes are correct?

What is the name for structures with the same molecular formula but different arrangements of atoms in space?

Which two of the following reactants are needed to produce the product shown in the image?

Which of the following is the organic product when propene reacts with steam at a high temperature and pressure, in the presence of an acid catalyst?

How many covalent bonds can a carbon atom form?

What are compounds that contain hydrogen and carbon atoms only called?

alkane + oxygen → carbon monoxide + water

alkane + oxygen → carbon dioxide + water

alkane + oxygen → carbon dioxide + hydrogen

alkane + oxygen → carbon monoxide + hydrogen

Which of the following equations for the complete combustion of alkanes is correct?

Which of the following are possible products from the incomplete combustion of propene?

Which of the following is the general formula for alkanes? 
Use the image shown of an ethane molecule to help you work it out.

Sort the following alkenes into order of increasing chain length, starting with the molecule that has the shortest chain.