Q. 19

How do you conver

Answer :

(i) Benzoic acid to Benzaldehyde

• Benzoic acid is chlorinated with thinly chloride to obtain Benzoyl chloride.

• Benzoyl chloride is hydrogenated to obtain Benzaldehyde- Rosenmund’s reduction.

(ii) Ethyne to Ethanal

On treating alkynes with H2SO4 and HgSO4 , a molecule of water is added to form aldehydes.

(iii) Acetic acid to methane

• Acetic acid is first converted to its sodium salt.

• Sodium salt of acetic acid is heated with sodium hydroxide & calcium oxide to form methane. In this process a molecule of CO2 is lost.


(i) Stephen Reaction

• On treating nitriles with stannous chloride in the presence of HCl, it is reduced to imine.

• Imine when hydrolysed results in aldehydes.

(ii) Wolff Kishner reduction

When a carbonyl compound is treated with hydrazine followed by heating with sodium or potassium hydroxide in boiling solvent like ethylene glycol, it gets reduced to a hydrocarbon. (CO group changes to CH2 group).

(iii) Etard reaction

On treating Toluene with chromyl chloride, methyl groul is oxidized to a chromium complex which on hydrolysis results in benzaldehyde.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

Alkenes <imChemistry - Exemplar

Benzaldehyde can Chemistry - Exemplar

Oxidation of ketoChemistry - Exemplar

Name the electropChemistry - Exemplar

Which of the follChemistry - Exemplar