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JEE Advanced2006ChemistryAminesActual

The smallest ketone and its next homologoue are reacted with NH ₂ OH to form oxime

Options

  1. Atwo different oximes are formed
  2. Bthree different oximes are formed
  3. Ctwo oximes are optically active
  4. Dall oximes are optically active

Correct answer

B. three different oximes are formed

Step-by-step solution

Lowest ketone is CH ₃ COCH ₃ (which form an oxime) and its next homologue is CH ₃ CH ₂ COCH ₃ which form oxime with NH ₂ OH . Such oxime shows the property of geometrical isomerism, i.e., it shows two isomers, symmetric and antisymmertic. (These are differ w.r.t. arrangement towards the space of - C = N , their different behaviour, can be confirmed with the help of Beckmann's rearrangement.

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