NCERT Class 12 Chemistry Solutions Aldehydes Ketones and Carboxylic Acids

NCERT Class 12 Chemistry Solutions Aldehydes Ketones and Carboxylic Acids - NCERT Solutions prepared for CBSE students by the best teachers in Delhi. 

Class XII  Chemistry

Chapter 12 – Aldehydes Ketones and Carboxylic Acids

Question 1:

What is meant by the following terms? Give an example of the reaction in each case.

(i) Cyanohydrin                                                     (ii) Acetal

(iii) Semicarbazone                                               (iv) Aldol

(v) Hemiacetal                                                      (vi) Oxime

(vii) Ketal                                                              (vii) Imine

(ix) 2,4-DNP-derivative                                       (x) Schiff’s base


Question 2:

Name the following compounds according to IUPAC system of nomenclature:






(vi) (CH3)3CCH2COOH

(vii) OHCC6H4CHO-p


Question 3:

Draw the structures of the following compounds.

(i) 3-Methylbutanal                                                (ii) p-Nitropropiophenone

(iii) p-Methylbenzaldehyde                                  (iv) 4-Methylpent-3-en-2-one

(v) 4-Chloropentan-2-one                                   (vi) 3-Bromo-4-phenylpentanoic acid

(vii) p,p’-Dihydroxybenzophenone                     (viii) Hex-2-en-4-ynoic acid


Question 4:

Draw structures of the following derivatives.

(i) The 2,4-dinitrophenylhydrazone of benzaldehyde

(ii) Cyclopropanone oxime

(iii) Acetaldehydedimethylacetal

(iv) The semicarbazone of cyclobutanone

(v) The ethylene ketal of hexan-3-one

(vi) The methyl hemiacetal of formaldehyde


Question 5:

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

(i) PhMgBr and then H3O+

(ii)Tollens’ reagent

(iii) Semicarbazide and weak acid

(iv)Excess ethanol and acid

(v) Zinc amalgam and dilute hydrochloric acid 


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