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Standard XII
Chemistry
Organic Compounds
Question

Resonance energy per benzene ring decreases in the order
  1. Naphthalene > benzene > Anthracene > Phenanthrene
  2. Benzene > Nephthalene > Anthracene > Phenanthrene
  3. Benzene > Naphthalene > Phenanthrene > Anthracene
  4. All have equal resonance energy

A
Benzene > Naphthalene > Phenanthrene > Anthracene
B
Benzene > Nephthalene > Anthracene > Phenanthrene
C
Naphthalene > benzene > Anthracene > Phenanthrene
D
All have equal resonance energy
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Solution
Verified by Toppr

Resonance energy per ring decreases with increase in no. of rings
∴ Benzene > Napthalene > Phenonthrene > Anthracene
No of resonance structures of phenanthrene < anthracene. Therefore resonance energy will be less
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