Q 1 :    

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

Assertion A: Alcohols react both as nucleophiles and electrophiles.

Reason R: Alcohols react with active metals such as sodium, potassium and aluminum to yield corresponding alkoxides and liberate hydrogen.

In the light of the above statements, choose the correct answer from the options given below:                                                   [2024]

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

     

  • A is true but R is false.

     

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

     

  • A is false but R is true.

     

(1)

Assertion:
Alcohols can react both as an electrophile as well as a nucleophile.

Reason:
Alcohols react with active metals to liberate hydrogen. This shows acidic nature of alcohols.

 



Q 2 :    

CH3CH2-OH(ii) KMnO4(iii) NaOH, CaO, Δ(i) Jone's Reagent

Consider the above reaction sequence and identify the major product P.                 [2024]

  • Methoxymethane

     

  • Methane

     

  • Methanoic acid

     

  • Methanal

     

(2)

CH3CH2-OH(Jones reagent) or KMnO4CrO3-H2SO4CH3COOHNaOH + CaO(Decarboxylation)CH4Methane+CO2

 



Q 3 :    

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

  • Ph-CH2-CH2-CH3

     

  •  

  •  

  • Ph-CH2-CH2-CH2-OH

     

(4)

Aromatic rings in the β position can function as neighboring groups.

 



Q 4 :    

Products A and B formed in the following set of reactions are                                               [2024]

  •  

  •  

  •  

  •  

(2)

 



Q 5 :    

Which among the following has the highest boiling point?                          [2024]

  • CH3CH2CH2CH2—OH

     

  • CH3CH2CH2CH3

     

  • CH3CH2CH2CHO

     

  • H5C2—O—C2H5

     

(1)

 



Q 6 :    

Common name of Benzene-1, 2-diol is                          [2024]

  • resorcinol

     

  • o-cresol

     

  • catechol

     

  • quinol

     

(3)

Benzene-1, 2-diol

                 Catechol



Q 7 :    

CH3-CH2-CH2-Br+NaOHC2H5OHProduct 'A'

Consider the above reactions, identify product B and product C.                       [2024]

  • B = 2-Propanol, C = 1-Propanol

     

  • B = C = 1-Propanol

     

  • B = C = 2-Propanol

     

  • B = 1-Propanol, C = 2-Propanol

     

(1)



Q 8 :    

Identify the major products A and B respectively in the following set of reactions.                      [2024]

  •  

  •  

  •  

  •  

(3)

This is acylation of alcohol



Q 9 :    

Given below are two statements:                 [2025]

Statement (I): The boiling points of alcohols and phenols increase with increase in the number of C-atoms.

Statement (II): The boiling points of alcohols and phenols are higher in comparison to other class of compounds such as ethers, haloalkanes.

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

  • Statement I is false but Statement II is true

     

  • Statement I is true but Statement II is false

     

  • Both Statement I and Statement II are true

     

  • Both Statement I and Statement II are false

     

(3)

With increase in number of carbon atoms, magnitude of London forces of attraction increases hence boiling point increases. Alcohols and phenols have intermolecular hydrogen bonding hence boiling point of alcohols and phenols are higher than ethers or haloalkanes with comparable molar masses.