Class XII

The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a __________ group.
  1. carbomate
  2. carboxylate
  3. carbonate
  4. carboxyl
The oxidation of toluene to benzoic acid can be stopped at the aldehyde stage. The reaction is called
  1. -------------------------------------------------------------------------------- Stephen reaction
  2. Friedel – crafts reaction
  3. Etard reaction
  4. Gatterman – Koch reaction
IUPAC name of CH3CHO is
  1. Formaldehyde
  2. Ethanal
  3. Acetaldehyde
  4. None of the above
Which of the following has most acidic hydrogen?
  1. 2, 3 – Hexanedione
  2. 2, 5 – Hexanedione
  3. 3 – Hexanone
  4. 2, 4 – Hexanedione
The compound which forms acetaldehyde when heated with dilute NaOH is
  1. 1, 2 dichloro ethane
  2. 1, 1, 1 trichloro ethane
  3. 1 chloro ethane
  4. 1, 1 dichloro ethane
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