MCQ (Previous Year Questions) - Carbonyl Group (Level 2) - JEE MCQ

When propionic acid is treated with aqueous NaHCO₃, CO₂ is liberated. The 'C' of CO₂ comes from [IIT 1996]

Benzoyl chloride is prepared from benzoic acid by:            [IIT 2000]

Which of the following acids has the smallest dissociation constant?    [IIT 2002]

When benzamid is treated with POCl₃, the product is:   [IIT 2004]

The correct IUPAC name of C₆H₅COCl is   [IIT 2006]

Which of the following reactants on reaction with conc. NaOH followed by acidification gives the following lactone as the only product?    [IIT 2006]

Match the compounds in Column I with their characteristic test(s)/reaction(s) given in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.   [IIT 2008]

Column I

(A)

(B)

(C)

(D)

Column II

(P) sodium fusion extract of the compound gives Prussian blue colour with FeSO₄

(Q) gives positive FeCl₃ test
(R) gives white precipitate with AgNO3

(S) reacts with aldehydes to form the corresponding hydrazone derivative

Match each of the compound in Column I with its characteristic reaction(s) in Column II.   [IIT 2009]

Column I

(A) CH₃CH₂CH₂CN

(B) CH₃CH₂OCOCH₃

(C) CH₃ – CH = CH – CH₂OH

(D) CH₃CH₂CH₂CH₂NH₂

Column II
(P) Reduction with Pd–C / H₂

(Q) Reduction with SnCl₂ / HCl
(R) Development of foul smell on treatment with chloroform and alcoholic KOH
(S) Reduction with diisobutylaluminium hydride (DIBAL – H)
(T) Alkaline hydrolysis

Match each of the compounds given in Column I with the reaction(s), that they can undergo, given in Column II.  [IIT 2009]

Q.13 The major product of the following reaction is    [IIT 2011]

Among the following compounds, the most acidic is         [IIT 2011]

The carboxy functional group (–COOH) is present in       [IIT 2012]

The compound that undergoes decarboxylation most readily under mild condition in      [IIT 2012]