Bihar Board 12th Chemistry Answer Key 7.2.2025


Synthesis of Naphthalene

Synthesis of Naphthalene

Synthesis of Naphthalene

Haworth Synthesis of Naphthalene

Benzene and succinic anhydride are heated in the presence of AlCl3 to form β-benzoylpropionic acid which on treated with Zn-Hg/HCl to form γ-phenylbutyric acid. γ-Phenylbutyric acid is now heated with concentrated sulphuric acid or phosphoric acid to form tetralone. Tetralone is now heated with Zn-Hg/HCl to form tetralin which on heated with Se or Pd to yield Naphthalene.
Synthesis of Naphthalene by Haworth Process

Synthesis of Naphthalene from 4-Phenyl 3-butenoic acid

When 4-phenyl 3-butenoic acid is heated with concentrated sulphuric acid, 1-naphthol is formed which on distillation with Zn dust gives Naphthalene.
Synthesis of Naphthalene

Important Reactions of Naphthalene

Structure Determination of Naphthalene

Polynuclear Aromatic Hydrocarbons MCQs


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B.Sc. 2nd Semester Chemistry

Session: 2024-2028


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