Select the most appropriate reagents for the transformation.

Question 1

Select the appropriate reagent(s) for the following four transformations.

Question 2

Question 3

Answer to question 1

The reagent needed to each of the transformation is given below.

(1) Sodium borohydride reduces the aldehyde to primary alcohol.

(2) Lithium aluminum hydride reduces the ester to the primary alcohol and the ketone to the secondary alcohol.

(3) Sodium borohydride reduces the acyl chloride to primary alcohol.

(4) Lithium aluminum hydride reduces the amide to the amine and the anhydride the primary alcohol.

Answer to question 2

Correct Option : Na₂Cr₂O₇,  aqueos H₂SO₄, acetone

The conversion of cyclohexanol to cyclohexanone is an oxidation reaction. Thus, it requires a strong oxidising reagent for the conversion to occur. NaBH₄ is a reducing agent and    H₂​​​​​​O  itself cannot oxidised cyclohexanol to cyclohexanone. NaIO₄ is a strong oxidising agent used for the oxidation of vicinal diols to aldehydes or ketones. 

NaBH₄ is a strong oxidising agent and H₂SO₄ is a strong reducing agent and is used for the conversion of cyclohexanol to cyclohexanone. 

Answer to question 3