BTEC L3 U5 - Alkanes and Alkenes

What is the difference between alkanes and alkenes?

• Alkanes and alkenes are the same thing.

• Alkanes have a higher boiling point than alkenes.

• Alkanes are unsaturated hydrocarbons with at least one double bond, while alkenes are saturated hydrocarbons with only single bonds.

• Alkanes are saturated hydrocarbons with only single bonds, while alkenes are unsaturated hydrocarbons with at least one double bond.

What is structural isomerism?

• Different shapes of molecules

• Different types of atoms in a molecule

• Different structural arrangements of atoms

• Different arrangements of atoms in a molecule

What are the physical properties of alkanes?

• High boiling points, low melting points, and solubility in water.

• Low boiling points, low melting points, and insolubility in water.

• Low boiling points, high melting points, and solubility in water.

• High boiling points, high melting points, and solubility in water.

What are the physical properties of alkenes?

• Alkenes are hydrocarbons that contain a carbon-carbon double bond and have the general formula CnH2n.

• Alkenes are hydrocarbons that contain a carbon-carbon quadruple bond and have the general formula CnH2n-2.

• Alkenes are hydrocarbons that contain a carbon-carbon single bond and have the general formula CnH2n+2.

• Alkenes are hydrocarbons that contain a carbon-carbon triple bond and have the general formula CnHn.

What are the differences in physical properties between alkanes and alkenes?

• The main difference in physical properties between alkanes and alkenes is the presence of double bonds in alkenes.

• Alkanes are more reactive than alkenes.

• Alkenes are more soluble in water than alkanes.

• Alkanes have higher boiling points than alkenes.

How can you distinguish between alkanes and alkenes using a chemical test?

• By performing the iodine water test

• By performing the hydrogen peroxide test

• By performing the litmus paper test

• By performing the bromine water test

What is the general formula for alkanes?

• CnH2n+2

• CnH2n

• CnH2n-2

• CnH2n+4

What is the general formula for alkenes?

• CnH2n+2

• CnH2n-2

• CnH2n

• CnHn

What is the difference between alkanes and alkenes?

• Alkanes have only double bonds, while alkenes have at least one single bond.

• Alkanes have only single bonds, while alkenes have at least one double bond.

• Alkanes have at least one double bond, while alkenes have only single bonds.

• Alkanes and alkenes have the same number of bonds.

What is the difference between alkanes and alkenes?

• Alkanes are saturated hydrocarbons with only single bonds, while alkenes are unsaturated hydrocarbons with at least one double bond.

• Alkanes have a higher boiling point than alkenes.

• Alkanes and alkenes are the same thing.

• Alkanes are unsaturated hydrocarbons with at least one double bond, while alkenes are saturated hydrocarbons with only single bonds.