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Home » Fsc Part 2 » Chemistry » Notes » Chemistry Chapter 9 | 2nd Year
Chemistry

Chemistry Chapter 9 | 2nd Year

April 3, 2013Updated:September 24, 2022No Comments1 Min Read
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 Chapter 9 Notes | Chemistry 2nd Year

“Aromatic Hydrocarbons”

  1. Aromatic hydrocarbons include benzene and all those compounds that structurally related to benzene.chapter-9-chemistry-2nd-year-notes
  2. Aromatic hydrocarbons containing in benzene ring in their molecules are called monocyclic aromatic hydrocarbons.
  3. Aromatic hydrocarbons containing two or more benzene ring in their molecular formula are called polycyclic aromatic hydrocarbons.
  4. Benzene was discovered by Michael Faraday in 1825.
  5. The electrons in benzene are loosely held and the ring acts as a source of electrons. Hence benzene is readily attacked by electrophiles in the presence of catalyst.
  6. Since electrophilic substitutions reaction lead to resonance stabilized because derivatives so substitutions are the main reaction of benzene.
  7. Resonance energy of benzene is 150.5kj/mole.
  8. Structure of benzene is the resonance hybrid of two Kekules structure and two Dewar’s structures.

See Also: FSc 2nd Year Smart Syllabus

See Also: Chemistry 2nd Year Paper Scheme 2021


See Also: 2nd Year Chemistry Guess Papers 2021

2nd year notes Chemistry 2nd year notes free online notes Online Course
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