Aromatic Compounds Quiz - CBSE Class 12 Chemistry

Free practice quiz: Aromatic Compounds (CBSE Class 12 Chemistry). 18 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 12 Chemistry practice quiz has 18 multiple-choice questions on Aromatic Compounds, and 18 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following compounds is an aromatic hydrocarbon?

   1. Cyclohexane
   2. Benzene
   3. Cyclopentene
   4. Ethanol
   Show answer

   Answer: B. Benzene

   Benzene is an aromatic compound known for its stability due to resonance. Cyclohexane is aliphatic, cyclopentene is unsaturated, and ethanol is an alcohol.

2. What type of hybridization is exhibited by the carbon atoms in benzene?

   1. sp2
   2. sp
   3. sp3
   4. d2sp3
   Show answer

   Answer: A. sp2

   In benzene, each carbon atom undergoes sp2 hybridization, which allows for the formation of planar ring structure and delocalized π-electron cloud.

3. In which reaction does benzene react with concentrated sulfuric acid?

   1. Sulfonation
   2. Nitration
   3. Hydrogenation
   4. Halogenation
   Show answer

   Answer: A. Sulfonation

   Benzene reacts with concentrated sulfuric acid for sulfonation, forming benzene sulfonic acid as the product.

4. What is the effect of substituents like -NO2 and -COOH on the electrophilic substitution reactions of aromatic compounds?

   1. Activating
   2. Deactivating
   3. Neutral
   4. Only ortho-para directing
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   Answer: B. Deactivating

   Substituents such as -NO2 and -COOH are deactivating groups due to their electron-withdrawing nature, lowering the reactivity of the aromatic compound.

5. What is the main reason for the stabilities of aromatic compounds?

   1. Presence of double bonds
   2. Hyperconjugation
   3. Resonance energy
   4. They are aliphatic
   Show answer

   Answer: C. Resonance energy

   The stability of aromatic compounds comes from their resonance energy, which is the energy released due to delocalized π-electrons across the cyclic structure.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is a key characteristic of aromatic compounds?
2. Which of the following statements is true about benzene?
3. Which reagent is most commonly used in nitration of benzene?
4. Which one of the following reactions involves a Friedel-Crafts acylation?
5. What is the by-product formed in the Friedel-Crafts alkylation of benzene?
6. How does the presence of electron-donating groups affect the reactivity of aromatic compounds?
7. What is the result of the Friedel-Crafts alkylation of benzene with isopropyl chloride?
8. Which compound is formed by the reduction of nitrobenzene?
9. What type of reaction is the bromination of benzene?
10. Which of the following compounds will not undergo Friedel-Crafts acylation?
11. What happens when you treat benzene with ozone followed by zinc?
12. What is the product formed when benzene reacts with potassium permanganate?
13. What is the mechanism involved in the electrophilic aromatic substitution of benzene?

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