An unknown compound gave a positive Tollens' test. Treatment of the unknown with I2/NaOH gave a solid which was identified as iodoform. The unknown was:
1: Acetophenone
2: Propanal
3: Ethanal
4: Acetone
Hinsberg's reagent is:
1: Pd + BaSO4
2: NH2NH2 + KOH
3: Benzenesulfonic acid
4: p-Toluenesulfonic acid
Which of the following will react with Fehling's solution giving a red precipitate?
1: CH3CH2CHO
2: CH3CH2CH2OH
3: CH3COCH3
4: CH3CH2OCH2CH3