1st Year Chemistry Chapter 19 Test19. Carbonyl Compounds

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which test produces a silver mirror when reacted with an aldehyde?
   1. Fehling's test
   2. Benedict's test
   3. Tollen's test
   4. Iodoform test
2. A carboxylic acid contains functional group :
   1. A Hydroxyl group
   2. A Carboxyl group
   3. Hydroxyl and Carboxyl group
   4. A Carboxyl and aldehyde group
3. The reaction of aldehydes and ketones with 2,4-DNP gives:
   1. Yellow precipitate
   2. Blue gas
   3. White fumes
   4. Black residue
4. The color change in the oxidation of alcohols with acidified potassium dichromate is from:
   1. Orange to green
   2. Green to orange
   3. Blue to red
   4. Yellow to colorless
5. Acidified potassium dichromate acts as a/an ______ agent.
   1. Reducing
   2. Oxidizing
   3. Catalytic
   4. Neutralizing
6. The functional group of carboxylic acids is:
   1. -OH
   2. -COOH
   3. -CO-
   4. -CHO
7. Fehling's solution contains which ion?
   1. Cu²⁺
   2. Ag⁺
   3. Na⁺
   4. Fe²⁺
8. The general formula for ketones is:
   1. CₙH₂ₙ₋₂O
   2. CₙH₂ₙ₊₂O
   3. CₙH₂ₙO
   4. CₙH₂ₙ₊₁O
9. The common name of propanone is:
   1. Acetone
   2. Ethanal
   3. Methanal
   4. Butanone
10. Esters are formed by the reaction of carboxylic acids with :
    1. Alcohols
    2. Ethers
    3. Aldehydes
    4. Alkyl halides