Q 1 :

The final product A formed in the following multistep reaction sequence is                         [2024]

  •  

  •  

  •  

  •  

(4)

 



Q 2 :

Identify the reagents used for the following conversion                         [2024]

  • A=LiAlH4, B=NaOH(aq), C=NH2-NH2/KOH, ethylene glycol

     

  • A=DIBAL-H, B=NaOH(aq), C=NH2-NH2/KOH, ethylene glycol

     

  • A=DIBAL-H, B=NaOH(alc), C=Zn/HCl

     

  • A=LiAlH4, B=NaOH(alc), C=Zn/HCl

     

(3)

DIBAL-H is used for selective reduction of esters and nitriles to aldehydes at low temperature (around 78°C).

 



Q 3 :

Match List – I with List – II.                                [2024]

Choose the correct answer from the options given below:

  • (A)−(III), (B)−(IV), (C)−(I), (D)−(II)

     

  • (A)−(IV), (B)−(II), (C)−(I), (D)−(III)

     

  • (A)−(IV), (B)−(II), (C)−(III), (D)−(I)

     

  • (A)−(III), (B)−(IV), (C)−(II), (D)−(I)

     

(2)

 



Q 4 :

Identify the product in the following reaction:                        [2024]

  •  

  •  

  •  

  •  

(1)

This is Clemmensen reduction reaction.

 



Q 5 :

Identify ‘A’ in the following reaction:                               [2024]

  •  

  •  

  •  

  •  

(3)

This is Wolff-Kishner reduction reaction.

 



Q 6 :

Identify A and B in the given chemical reaction sequence:                [2024]

  •  

  •  

  •  

  •  

(3)

 



Q 7 :

Consider the given reaction, identify the major product P.                    [2024]

  • CH3CH2CH2OH 

     

  •  

  •  

  •  

(2)

Note: Actual product is anion of (P) as hydrolysis is done in basic medium.



Q 8 :

What is the structure of C?                             [2024]

  •  

  •  

  •  

  •  

(2)

 



Q 9 :

Which of the following compounds can give positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite?         [2024]

  •  

  • CH3 CH2 CH2 CHO 

     

  •  

  •  

(1)

 



Q 10 :

The product (P) formed in the following reaction is:             [2025]

  •  

  •  

  •  

  •  

(4)

This is Clemmenson’s reduction, it reduces aldehydes/ketones to corresponding alkanes.

 



Q 11 :

Number of molecules from below which cannot give iodoform reaction is:

Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone, Pentanal and 3-Pentanol         [2025]

  • 5

     

  • 4

     

  • 3

     

  • 2

     

(2)

Butanal, 3-pentanone, pentanal and 3-pentanol do not give iodoform test.

 



Q 12 :

The major product (P) in the following reaction is:              [2025]

  •  

  •  

  •  

  •  

(2)

This is intramolecular Cannizzaro reaction. Aldehydic part gets oxidized and ketonic part gets reduced.

 



Q 13 :

Which among the following compounds give yellow solid when reacted with NaOI/NaOH?

Choose the correct answer from the options given below:                   [2025]

  • (B), (C) and (E) Only

     

  • (A) and (C) Only

     

  • (C) and (D) Only

     

  • (A), (C) and (D) Only

     

(2)

Iodoform test is given by methyl aldehydes (CH3–CO–H) / methyl ketones (CH3–CO–R) or Secondary alcohols (CH3–CH(OH)–H / CH3–CH(OH)–R) which are oxidized to such compounds in reaction conditions of iodoform test.

 



Q 14 :

A compound “X” absorbs 2 moles of hydrogen and ‘X’ upon oxidation with KMnO4/H+ gives

The total number of σ bonds present in the compound ‘X’ is _______. [2025]



(27)

X is either of the following two. It has 27 sigma bonds.

 



Q 15 :

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

In the light of the above statements, choose the correct answer from the options given below:               [2023]

  • A is false but R is true.

     

  • Both A and R are true and R is the correct explanation of A.

     

  • A is true but R is false.

     

  • Both A and R are true but R is not the correct explanation of A.

     

(1)

Zn–Hg/HCl (Clemmensen reduction reduces the carbonyl group to –CH2 but also affect acid sensitive functional groups as alkene, alcohol, ether and ester.



Q 16 :

Given below are two statements:

In the light of the above statements, choose the correct answer from the options given below:         [2023]

  • Statement I is true but Statement II is false

     

  • Statement I is false but Statement II is true

     

  • Both Statement I and Statement II are true

     

  • Both Statement I and Statement II are false

     

(1)



Q 17 :

‘A’ and ‘B’ in the above reactions are:                           [2023]

  •  

  •  

  •  

  •  

(3)

 



Q 18 :

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

In the light of the above statements, choose the correct answer from the options given below:            [2023]

  • Both A and R are true and R is the correct explanation of A

     

  • A is false but R is true

     

  • Both A and R are true but R is NOT the correct explanation of A

     

  • A is true but R is false

     

(2)

Wolff–Kishner reduction is not suitable for base sensitive group.

 



Q 19 :

The major product formed in the following reaction is

Choose the correct answer from the options given below:              [2023]

  • D only

     

  • C only

     

  • B only

     

  • A only

     

(3)