Aldehydes, Ketones & Carboxylic Acids

15 Questions | Total Attempts: 983

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Aldehydes, Ketones & Carboxylic Acids

Time: 30 Minute


Questions and Answers
  • 1. 
    Identify the product Y in the following reaction sequence:
    • A. 

      Pentane

    • B. 

      Cyclobutane

    • C. 

      Cyclopentane

    • D. 

      Cyclopentanone

  • 2. 
    Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of:
    • A. 

      A vinyl group

    • B. 

      An isopropyl group

    • C. 

      An acetylene triple bond

    • D. 

      Two ethylenic double bonds

  • 3. 
    Which of the following on heating with aqueous KOH, produces acetaldehyde:
    • A. 

      CH3CH2Cl

    • B. 

      CH2Cl.CH2Cl

    • C. 

      CH3CHCl2

    • D. 

      CH3COCl

  • 4. 
    The dipole moment is the highest for
    • A. 

      Trans-2-butene

    • B. 

      1, 3-dimethylbenzene

    • C. 

      Acetophenone

    • D. 

      Ethanol

  • 5. 
    During reduction of aldehydes with hydrazine and potassium hydroxide, the first is formation of:
    • A. 

      R-C≡N

    • B. 

      R-CO-NH2

    • C. 

      R-CH=NH

    • D. 

      R-CH=N-NH2

  • 6. 
    If the enolate ion combines with the carbonyl group of an ester, we get:
    • A. 

      Aldol

    • B. 

      α, β-unsaturated ester

    • C. 

      β-ketoaldehyde

    • D. 

      Acid

  • 7. 
    • A. 
    • B. 
    • C. 
    • D. 
  • 8. 
    Which of the following combination of aldehydes gives cross Cannizzaro reaction?
    • A. 

      CH3CHO, HCHO

    • B. 

      C6C5CHO, CH3CHO

    • C. 

      C6C5CHO, HCHO

    • D. 

      All of these

  • 9. 
    Among the following acids which has the lowest pKa value?
    • A. 

      CH3COOH

    • B. 

      HCOOH

    • C. 

      (CH3)2CHCOOH

    • D. 

      CH3CH2COOH

  • 10. 
    Which of the following compound will have the smallest pKa value?
    • A. 

      Benzoic acid

    • B. 

      Formic acid

    • C. 

      Acetic acid

    • D. 

      Phenylacetic acid

  • 11. 
    Which one of the following pairs gives effervescence with aq. NaHCO3? I. CH3COCl II. CH3COCH3 III. CH3COOCH3 IV. CH3CO.O.COCH3
    • A. 

      I and II

    • B. 

      I and IV

    • C. 

      II and III

    • D. 

      I and III

  • 12. 
    Consider The correct decreasing order of their reactivity towards hydrolysis is:
    • A. 

      (ii) > (iv) > (i) > (iii)

    • B. 

      (ii) > (iv) > (iii) > (i)

    • C. 

      (i) > (ii) > (iii) > (iv)

    • D. 

      (iv) > (ii) > (i) > (iii)

  • 13. 
    When CH2 = CH–COOH is reduced with LiAlH4, the compound obtained will be:
    • A. 

      CH3–CH2–CHO

    • B. 
    • C. 

      CH2–CH–CH2OH

    • D. 

      CH3–CH2–COOH

  • 14. 
    Which of the following acids on heating loses a molecule of H2O to from and α, β-unsaturated acid?
    • A. 

      CH3CHOHCOOH

    • B. 

      HOCH2COOH

    • C. 

      CH3CHOHCH2COOH

    • D. 

      HOCH2CH2CH2COOH

  • 15. 
    Which of the following reagents may be used to distinguish between phenol and benzoic acid?
    • A. 

      Tollens’ reagent

    • B. 

      Molisch reagent

    • C. 

      Neutral FeCl3

    • D. 

      Aqueous NaOH

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