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Benzene has the formula:

• 1 C6H6
• 2 C5H5
• 3 C6H14
• 4 C6H12

Alkenes mainly undergo:

• 1 No reactions
• 2 Elimination only
• 3 Substitution reactions only
• 4 Addition reactions

The hybridisation of carbon in ethene is:

• 1 sp2
• 2 sp
• 3 sp3d
• 4 sp3

Addition of HBr to propene follows Markovnikov's rule to give mainly:

• 1 Bromopropene
• 2 1-bromopropane
• 3 2-bromopropane
• 4 Propane

Benzene reacts mainly by:

• 1 Nucleophilic addition
• 2 Addition
• 3 Free radical chain only
• 4 Electrophilic substitution