Benzene A Level (Question Bank)

What is the empirical formula of benzene?

• CH
• CH₆

• C₆H₆

• C₆H₁₂

What is the molecular formula of benzene?

• CH
• CH₆

• C₆H₆

• C₆H₁₂

Which of the picture below is the structural formula of benzene?

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Benzene reacts with bromine. What is the correct balanced chemical equation for this reaction?

• C₆H₆ + Br₂ → C₆H₅Br + HBr

• C₆H₆ + Br₂ → C₆H₅Br + H₂

• C₆H₆ + Br₂ → C₆H₅Br + H₂O

• C₆H₆ + Br₂ → C₆H₄Br₂ + 2HBr

Benzene reacts with bromine. Which one of the catalyst below can possibly be used?

• AlCl₃

• FeCl₃

• AlBr₃

• Al₂O₃

Benzene reacts with 1-chloropropane. This is called a Friedel-Crafts reaction. What is the formula of the electrophile?

• CH₃⁺

• CH₃CH₂⁺

• CH₃CH₂CH₂⁺

• Cl⁺

Benzene reacts with 1-chloropropane. What is the name of the organic product?

• chlorobenzene
• propylbenzene
• propanoic acid
• propanone

Given three steps of reaction mechanism of Friedel-Crafts reaction. Which step shows the formation of intermediate from attack of electrophile on the benzene ring?

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What is the molecular formula of phenol?

• C₆H₆

• C₆H₅Cl

• C₆H₅CH₃

• C₆H₅OH

What is the empirical formula of phenol?

• CH
• CHO
• CH₂O

• C₆H₆O