MCQs on Aromaticity

MCQs on Aromaticity

1. Which of the following compounds is not aromatic?

 

 

2. Which of the following is not a characteristic property of arenes?

(a) Delocalisation of ????-electrons

(b) Resonance

(c) Greater stability

(d) Electrophilic additions

3. Which of the following statements is true for benzene?

(a) Benzene easily undergoes addition due to unsaturation

(b) ????-electrons are delocalised in the benzene ring

(c) Three isomeric forms are formed on monosubstitution of benzene

(d) Two types of C-C bonds are present in benzene

4. Which of the following is the correct representation to relate the two resonating Kekule structures of benzene?

(a) →

(b) ≡

(c) ↔

(d) ⇌

5. The bond length of C-C bonds in benzene is

(a) 110 pm

(b) 156 pm

(c) 121 pm

(d) 139 pm

6. Which of the following is a characteristic of an aromatic compound?

(a) Cyclic

(b) Planar

(c) (4n+2)???? electrons

(d) All of the above

7. Which of the following is incorrect for benzene?

(a) Planar C₆ ring

(b) Localised ???? bonding

(c) sp² hybridised C atoms

(d) It shows reactions characteristics of C=C double bonds

8. Which of the following is incorrect for electrophilic substitution?

(a) -NO₂ is deactivating and m-directing

(b) -Cl is activating and o, p-directing

(c) -OH is activating and o, p-directing

(d) -CH₃ is activating and o, p-directing

9. The number of delocalised ???? electrons in the benzene ring are

(a) 6

(b) 8

(c) 2

(d) 4

10. Which of the following is the reactive species in the nitration of benzene?

(a) NO₂⁺

(b) NO₂^–

(c) NO₃

(d) HNO₃

Answer

1. (c)	2. (d)	3. (b)	4. (c)	5. (d)
6. (d)	7. (d)	8. (b)	9. (a)	10. (a)