Homologous Series of Alkanes and Alkenes

What is the definition of an alkane?

• A hydrocarbon with a double covalent bond between two carbon atoms

• A hydrocarbon with only single covalent bonds between carbon atoms

• A hydrocarbon with a triple covalent bond between two carbon atoms

• A hydrocarbon with alternating single and double covalent bonds between carbon atoms

What is the molecular formula of methane?

• C₂H₄

• C₃H₆

• C₄H₈

• CH₄

What is the general formula for the alkane series?

• C_nH_2n

• C_nH_2n+2

• C_nH_2n-2

• C_nH_2n+4

How many hydrogen atoms are present in a decane molecule?

• 10

• 20

• 22

• 30

What is the definition of an alkene?

• A hydrocarbon with a double covalent bond between two carbon atoms

• A hydrocarbon with only single covalent bonds between carbon atoms

• A hydrocarbon with a triple covalent bond between two carbon atoms

• A hydrocarbon with alternating single and double covalent bonds between carbon atoms

What is the molecular formula of ethene?

• C₂H₄

• C₃H₆

• C₄H₈

• CH₄

How many shared pairs of electrons are there between the carbon atoms in ethene?

• 1

• 2

• 3

• 4

What is the general formula for the alkene series?

• C_nH_2n

• C_nH2_n+2

• C_nH_2n-2

• C_nH_2n+4

How many hydrogen atoms are present in a butane molecule?

• 4

• 6

• 8

• 10

What is the relationship between the number of carbons and hydrogens in the alkene series?

• Equal number of carbons and hydrogens

• Double the number of hydrogens than carbons

• Triple the number of hydrogens than carbons

• Half the number of hydrogens than carbons