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Karnataka Board PUCPUC Science 2nd PUC Class 12

Physical Properties of Aldehydes and Ketones

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Estimated time: 2 minutes
Maharashtra State Board: Class 12

Key Points: Physical Properties of Aldehydes and Ketones

  • Preparation (aliphatic/aromatic): From 2° alcohol (K₂Cr₂O₇/H₂SO₄ or Cu/573 K), alkene (ozonolysis), alkyne (dil. H₂SO₄/HgSO₄, 333 K), acetyl chloride + R₂Cd, nitrile + R′MgX (dry ether, H₃O⁺).
  • Aromatic ketones: Benzene + RCOCl / anhyd. AlCl₃ (Friedel–Crafts acylation).
  • Addition reactions: HCN → cyanohydrin; NaHSO₃ → bisulphite adduct; R″OH/dry HCl → ketal; R′MgX then H⁺/H₂O → 3° alcohol.
  • Condensation reactions: NH₂OH → ketoxime; NH₂NH₂ → hydrazone; C₆H₅NHNH₂ → phenylhydrazone.
  • Reductions: Clemmensen (Zn–Hg/conc. HCl) and Wolf–Kishner (NH₂NH₂, KOH/ethylene glycol) → alkane (R–CH₂–R′).

Video Tutorials

We have provided more than 1 series of video tutorials for some topics to help you get a better understanding of the topic.

Series 1


Series 2


Shaalaa.com | Aldehydes Ketones part 13 (Properties)

Shaalaa.com


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Aldehydes Ketones part 13 (Properties) [00:17:10]
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