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AROMATICITY MCQs

Total Questions : 20 | Page 2 of 2 pages
Question 11. Which of the following is a characteristic of an aromatic compound?
  1.    Planar
  2.    Cyclic
  3.    (4n+2)𝞹 electrons
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 12. Which one is the simplest aromatic hydrocarbon?
  1.    Aspirin
  2.    Benzene
  3.    Chloride
  4.    Picric acid
 Discuss Question
Answer: Option B. -> Benzene
Question 13. Freon used as refrigerant is chemically
  1.    Chlorinated hydrocarbon
  2.    Fluoridated hydrocarbon
  3.    Chlorofluoro hydrocarbon
  4.    Fluorinated aromatic compound
 Discuss Question
Answer: Option C. -> Chlorofluoro hydrocarbon
Question 14. Most common reactions of benzene (aromatic hydrocarbon) and its derivatives are
  1.    Electrophilic addition reactions
  2.    Electrophilic substitution reactions
  3.    Nucleophilic addition reactions
  4.    Nucleophilic substitution reactions
 Discuss Question
Answer: Option B. -> Electrophilic substitution reactions
Question 15. Aromatic compounds burn with sooty flame because
  1.    They have a relatively high percentage of hydrogen
  2.    They have a ring structure of carbon atoms
  3.    They have a relatively high percentage of carbon
  4.    They resist reaction with oxygen of air
 Discuss Question
Answer: Option C. -> They have a relatively high percentage of carbon
Question 16. Which of the following has lowest knocking property
  1.    Olefins
  2.    Straight chain paraffins
  3.    Aromatic hydrocarbons
  4.    Branched chain paraffins
 Discuss Question
Answer: Option C. -> Aromatic hydrocarbons
Question 17. Among the following statements on the nitration of aromatic compounds, the false one is
  1.    Nitration is an electrophilic substitution reaction
  2.    The rate of nitration of benzene is greater than that of hexadeuterobenzene
  3.    The rate of nitration of toluene is greater than that of benzene
  4.    The rate of nitration of benzene is almost the same as that of hexadeuterobenzene
 Discuss Question
Answer: Option B. -> The rate of nitration of benzene is greater than that of hexadeuterobenzene
Question 18. Pyridine is less basic than triethylamine because
  1.    Pyridine has aromatic character
  2.    Nitrogen in pyridine is sp2 hybridized
  3.    Pyridine is a cyclic system
  4.    In pyridine, lone pair of nitrogen is delocalized
 Discuss Question
Answer: Option D. -> In pyridine, lone pair of nitrogen is delocalized
Question 19. The compound ?A? having formula C8H10 (aromatic) which gives 1 mononitro substitute and 3 nitrosubstitute compound is
  1.    m-Xylene
  2.    p-Xylene
  3.    o-Xylene
  4.    Ethyl benzene
 Discuss Question
Answer: Option B. -> p-Xylene
Question 20. Wax used for making candle is chemically a mixture of
  1.    Aliphatic hydrocarbons
  2.    Aromatic hydrocarbons
  3.    Cyclic hydrocarbons
  4.    Aliphatic and aromatic hydrocarbons
 Discuss Question
Answer: Option A. -> Aliphatic hydrocarbons

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