✓ Board-verified
Chemistry · 2022 · 2 marks
Aldehydes, Ketones and Carboxylic AcidsChemical Reactions of Aldehydes, Ketones and Carboxylic Acids2 marksUnderstandvery short answer
CBSE 2022 · Region 5 · Set 1 · Q3
Explain the following reactions: (a) Wolff Kishner reduction (b) Cannizzaro reaction
Explain the following reactions :
(a)
Wolff Kishner reduction
(b)
Cannizzaro reaction
Marking-scheme solution
(a)
$\displaystyle {\mathrm{H_3C}\atop\mathrm{H_3C}}\mkern-6mu{\diagdown\atop\diagup}\mkern-4mu\mathrm{C}{=}\mathrm{O} + \mathrm{NH_2NH_2} \longrightarrow {\mathrm{H_3C}\atop\mathrm{H_3C}}\mkern-6mu{\diagdown\atop\diagup}\mkern-4mu\mathrm{C}{=}\mathrm{NNH_2} \xrightarrow[\Delta]{\text{KOH, ethylene glycol}} \mathrm{CH_3{-}CH_2{-}CH_3} + \mathrm{N_2}$
(b)
$\displaystyle 2\,\mathrm{HCHO} \xrightarrow{\ \text{conc. KOH}\ } \mathrm{CH_3OH} + \mathrm{HCOO^-K^+}$
All Aldehydes, Ketones and Carboxylic Acids questions2022 question paperNCERT solutions: Aldehydes, Ketones and Carboxylic AcidsPractice Aldehydes, Ketones and Carboxylic Acids →
More from Aldehydes, Ketones and Carboxylic Acids
- Write the equation involved in the following reactions: (i) Rosenmund reduction (ii) Etard reaction (iii) Stephen reaction OR (i) Which acid of each…2022
- Draw the structures of product(s) in each of the following reactions:2025
- The acid formed when propyl magnesium bromide is treated with CO_2 followed by acid hydrolysis is:2025
- (i) Identify A, B and C in the following reactions: (ii) Give reasons for the following: (I) Carboxylic acids do not give the characteristic…2025
- Write the products formed in the following reactions: CH_3 CHO+NH_2 CONHNH_2 → 1 CH_3 CHO → dil. NaOH 1 CH_3 COOH →[H_2 O]Cl_2 / redP2025
- Give a simple chemical test to distinguish between 3-pentanone and 2-pentanone. Write an equation for Clemmensen reduction.2025
- This reaction is known as:2023
- Give chemical tests to distinguish between the following pairs of compounds: (i) Phenol and Benzoic acid (ii) Propanal and Propanone Which one of the…2024
CBSE Class 12 Chemistry past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.