Carbonyl Activity 1

A positive test was obtained when Fehling's solution was added to unknown P. What functional group is most likely present in P?

• ketone and aldehyde

• ketone only

• aldehyde only

• neither ketone not aldehyde

Which functional group(s) would react with 2,4-DNPH to give an orange precipitate?

• carboxylic acid

• ketone

• ester

• aldehyde

Upon adding to unknown solution A, orange-brown bromine water is decolourized.

What could be present in A?

• alkene (C=C)

• carboxylic acid (RCOOH)

• alcohol (ROH)

• halogenoalkane (RX)

6-methyl-1,6-octadiene is treated with hot acidified KMnO4, what are the organic products obtained?

• a diketone and a

  carboxylic acid

• a dicarboxylic acid and a ketone

• a carboxylic acid and a keto-acid

• a ketone and a carboxylic acid

Which functional group cannot be reduced with hydrogen gas (Pt, heat) ?

• alkenes

• alcohols

• nitriles

• ketones

Which of the following will give a positive iodoform test?

• 3-pentanone

• 3-heptanone

• cyclohexanone

• 2-hexanone