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Topic Question Set

Q 21 :    

In the given structure, number of sp and sp² hybridized carbon atoms present respectively are:              [2025]

  • 4 and 5

     

  • 4 and 6

     

  • 3 and 5

     

  • 3 and 6

     

(3)

 

Q 22 :    

Match List I with List II.                             [2025]

Choose the correct answer from the options given below:

  • (A-III), (B-II), (C-IV), (D-I)

     

  • (A-III), (B-II), (C-I), (D-IV)

     

  • (A-II), (B-III), (C-IV), (D-I)

     

  • (A-II), (B-III), (C-I), (D-IV)

     

(3)

Based on IUPAC nomenclature rules.

 

 

Q 23 :    

Total number of sigma (σ) ____ and pi(π) ____ bonds respectively present in hex-1-en-4-yne are:                [2025]

  • 3 and 13

     

  • 14 and 3

     

  • 11 and 3

     

  • 13 and 3

     

(4)

 

Q 24 :    

In 3,3-dimethylhex-1-ene-4-yne, there are ____ sp3, ____ sp2 and ____ sp hybridised carbon atoms respectively:                 [2025]

  • 4, 2, 2

     

  • 3, 3, 2

     

  • 2, 4, 2

     

  • 2, 2, 4

     

(1)

 

Q 25 :    

What is the correct IUPAC name of                          [2025]

  • 3-Bromo-2-hydroxy-5-nitrobenzoic acid

     

  • 3-Bromo-4-hydroxy-1-nitrobenzoic acid

     

  • 2-Hydroxy-3-bromo-5-nitrobenzoic acid

     

  • 5-Nitro-3-bromo-2-hydroxybenzoic acid

     

(1)

Numbering is done to give lowest set of locants, starting from principal functional group. Substituents are placed in alphabetical order in IUPAC name.

 

Q 26 :    

The IUPAC name of the following compound is:                 [2025]

  • 4-Hydroxyhept-1-en-6-yne

     

  • 4-Hydroxyhept-6-en-1-yne

     

  • Hept-6-en-1-yn-4-ol

     

  • Hept-1-en-6-yn-4-ol

     

(4)

When double bond and triple bond are at equivalent positions, then double bond gets lower locant.

 

Q 27 :    

Which of the following is the correct IUPAC name of given organic compound (X)?                  [2025]

  • 2-Bromo-2-methylbut-2-ene

     

  • 3-Bromo-3-methylprop-2-ene

     

  • 1-Bromo-2-methylbut-2-ene

     

  • 4-Bromo-3-methylbut-2-ene

     

(3)

When double bond is at equivalent position from both ends of principal chain, then numbering is done from the end so as to give lowest locant to substituents.

 

Q 28 :    

What is the correct IUPAC name of                   [2025]

  • 4-Ethyl-1-hydroxycyclopent-2-ene

     

  • 1-Ethyl-3-hydroxycyclopent-2-ene

     

  • 1-Ethylcyclopent-2-en-3-ol

     

  • 4-Ethylcyclopent-2-en-1-ol

     

(4)

Priority order of giving lowest locants is: functional group > double bond > substituents

 

Q 29 :    

The sum of sigma (σ) and pi(π) bonds in Hex-1,3-dien-5-yne is ______.                    [2025]


(15)