NCERT solutions for Class 12 Chemistry chapter 12 - Aldehydes, Ketones and Carboxylic Acids [Latest edition]

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Chapter 12: Aldehydes, Ketones and Carboxylic Acids

Intext QuestionsExercises
Intext Questions [Pages 353 - 376]

NCERT solutions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Intext Questions [Pages 353 - 376]

Intext Questions | Q 1.1 | Page 353

Write the structures of the following compounds

α-Methoxypropionaldehyde

Intext Questions | Q 1.2 | Page 353

Write the structures of the following compounds.

3-Hydroxybutanal

Intext Questions | Q 1.3 | Page 353

Write the structures of the following compounds.

2-Hydroxycyclopentane carbaldehyde

Intext Questions | Q 1.4 | Page 353

Write the structures of the following compounds.

4-Oxopentanal

Intext Questions | Q 1.5 | Page 353

Write the structures of the following compounds

Di-sec-butyl ketone

Intext Questions | Q 1.6 | Page 353

Write the structures of the following compounds

4-Fluoroacetophenone

Intext Questions | Q 2.1 | Page 356

Write the structures of products of the following reactions;

Intext Questions | Q 2.2 | Page 356

Write the structures of products of the following reactions;

`(C_6H_5CH_2)_2Cd + 2CH_3COCl ->`

Intext Questions | Q 2.3 | Page 356

Write the structures of products of the following reactions;

Intext Questions | Q 2.4 | Page 356

Write the structures of products of the following reactions;

Intext Questions | Q 3 | Page 358

Arrange the following compounds in increasing order of their boiling points.

CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3

Intext Questions | Q 4.1 | Page 365

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions

Ethanal, Propanal, Propanone, Butanone.

Intext Questions | Q 4.2 | Page 365

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions.

Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

Intext Questions | Q 5.1 | Page 365

Predict the products of the following reactions:

Intext Questions | Q 5.2 | Page 365

Predict the products of the following reactions

Intext Questions | Q 5.3 | Page 365

Predict the products of the following reactions:

Intext Questions | Q 5.4 | Page 365

Predict the products of the following reactions:

Intext Questions | Q 6.1 | Page 367

Give the IUPAC names of the following compounds:

 PhCH2CH2COOH

Intext Questions | Q 6.2 | Page 367

Give the IUPAC names of the following compounds:

(CH3)2C=CHCOOH

Intext Questions | Q 6.3 | Page 367

Give the IUPAC names of the following compounds:

Intext Questions | Q 6.4 | Page 367

Give the IUPAC names of the following compounds:

Intext Questions | Q 7.1 | Page 370

Show how each of the following compounds can be converted to benzoic acid.

Ethylbenzene 

Intext Questions | Q 7.2 | Page 370

Show how each of the following compounds can be converted to benzoic acid.

Acetophenone

Intext Questions | Q 7.3 | Page 370

Show how each of the following compounds can be converted to benzoic acid.

Bromobenzene 

Intext Questions | Q 7.4 | Page 370

Show how each of the following compounds can be converted to benzoic acid.

Phenylethene (Styrene)

Intext Questions | Q 8.1 | Page 376

Which acid of each pair shown here would you expect to be stronger?

CH3CO2H or CH2FCO2H

Intext Questions | Q 8.2 | Page 376

Which acid of each pair shown here would you expect to be stronger?

CH2FCO2H or CH2ClCO2H

Intext Questions | Q 8.3 | Page 376

Which acid of each pair shown here would you expect to be stronger?

CH2FCH2CH2CO2H or CH3CHFCH2CO2H

Intext Questions | Q 8.4 | Page 376

Which acid of each pair shown here would you expect to be stronger?

Exercises [Pages 377 - 379]

NCERT solutions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Exercises [Pages 377 - 379]

Exercises | Q 1.1 | Page 377

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

Schiff’s base

Exercises | Q 1.1 | Page 377

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

Cyanohydrin 

Exercises | Q 1.2 | Page 377

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

Acetal

Exercises | Q 1.3 | Page 377

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

Semicarbazone 

Exercises | Q 1.4 | Page 377

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

Aldol

Exercises | Q 1.5 | Page 377

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

Hemiacetal

Exercises | Q 1.6 | Page 377

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

Oxime

Exercises | Q 1.7 | Page 377

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

Ketal 

Exercises | Q 1.8 | Page 377

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

Imine

Exercises | Q 1.9 | Page 377

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

2,4-DNP-derivative

Exercises | Q 2.1 | Page 377

Name the following compound according to IUPAC system of nomenclature:

CH3CH(CH3)CH2CH2CHO

 

Exercises | Q 2.2 | Page 377

Name the following compounds according to IUPAC system of nomenclature

CH3CH2COCH(C2H5)CH2CH2Cl

Exercises | Q 2.3 | Page 377

Name the following compounds according to IUPAC system of nomenclature:

CH3CH=CHCHO

Exercises | Q 2.4 | Page 377

Name the following compounds according to IUPAC system of nomenclature:

CH3COCH2COCH3

Exercises | Q 2.5 | Page 377

Name the following compounds according to IUPAC system of nomenclature:

CH3CH(CH3)CH2C(CH3)2COCH3

Exercises | Q 2.7 | Page 377

Name the following compounds according to IUPAC system of nomenclature:

OHCC6H4CHO-p

Exercises | Q 3.1 | Page 377

Draw the structures of the given compound - 3-Methylbutanal

Exercises | Q 3.2 | Page 377

Draw the structures of the given compound - p-Nitropropiophenone

Exercises | Q 3.3 | Page 377

Write the structure of p-methylbenzaldehyde.

Exercises | Q 3.4 | Page 377

Draw the structures of the given compounds - 4-Methylpent-3-en-2-one

Exercises | Q 3.5 | Page 377

Write the structure of 4-chloropentan-2-one.

Exercises | Q 3.6 | Page 377

Draw the structures of the given compound - 3-Bromo-4-phenylpentanoic acid

Exercises | Q 3.7 | Page 377

Draw the structures of given compounds - p,p’-Dihydroxybenzophenone

Exercises | Q 3.8 | Page 377

Draw the structures of the given compounds - Hex-2-en-4-ynoic acid

Exercises | Q 4.1 | Page 377

Write the IUPAC name of the following ketones and aldehydes. Wherever possible, give also common name.

CH3CO(CH2)4CH3

Exercises | Q 4.2 | Page 377

Write the IUPAC name of the following ketones and aldehydes. Wherever possible, give also common names.

CH3CH2CHBrCH2CH(CH3)CHO

Exercises | Q 4.3 | Page 377

Write the IUPAC names of the following ketones and aldehydes. Wherever possible, give also common names.

CH3(CH2)5CHO

Exercises | Q 4.4 | Page 377

Write the IUPAC name of the following ketones and aldehydes. Wherever possible, give also common name.

Ph-CH=CH-CHO

Exercises | Q 4.5 | Page 377

Write the IUPAC name of the following ketones and aldehydes. Wherever possible, give also common name

Exercises | Q 4.6 | Page 377

Write the IUPAC name of the following ketones and aldehydes. Wherever possible, give also common name.

PhCOPh

 

Exercises | Q 5.1 | Page 377

Draw structures of the given derivatives - The 2,4-dinitrophenylhydrazone of benzaldehyde

Exercises | Q 5.2 | Page 377

Draw structures of the given derivatives - Cyclopropanone oxime

Exercises | Q 5.3 | Page 377

Draw structures of the given derivatives - Acetaldehydedimethylacetal

Exercises | Q 5.4 | Page 377

Draw structures of given derivatives The semicarbazone of cyclobutanone

Exercises | Q 5.5 | Page 377

Draw structures of the given derivatives The ethylene ketal of hexan-3-one

Exercises | Q 5.6 | Page 377

Draw structures of the given derivatives The methyl hemiacetal of formaldehyde.

Exercises | Q 6.1 | Page 378

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

PhMgBr and then H3O+

Exercises | Q 6.2 | Page 378

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

Tollens’ reagent

 

Exercises | Q 6.3 | Page 378

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

Semicarbazide and weak acid

Exercises | Q 6.4 | Page 378

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

Excess ethanol and acid

Exercises | Q 6.5 | Page 378

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

Zinc amalgam and dilute hydrochloric acid

Exercises | Q 7 | Page 378

Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction.

(i) Methanal 

(ii) 2-Methylpentanal

(iii) Benzaldehyde 

(iv) Benzophenone

(v) Cyclohexanone 

(vi) 1-Phenylpropanone

(vii) Phenylacetaldehyde 

(viii) Butan-1-ol

(ix) 2, 2-Dimethylbutanal

Exercises | Q 8.1 | Page 378

How will you convert ethanal into the following compounds?

Butane-1, 3-diol 

Exercises | Q 8.2 | Page 378

How will you convert ethanal into the following compounds?

But-2-enal

Exercises | Q 8.3 | Page 378

How will you convert ethanal into the following compounds?

But-2-enoic acid

Exercises | Q 9 | Page 378

Write structural formulas and names of four possible aldol condensation products from propanal and butanal. In each case, indicate which aldehyde acts as nucleophile and which as electrophile.

Exercises | Q 10 | Page 378

An organic compound with the molecular formula C9H10O forms 2, 4-DNP derivative, reduces Tollens’ reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1, 2-benzenedicarboxylic acid. Identify the compound.

Exercises | Q 11 | Page 378

An organic compound (A) (molecular formula C8H16O2) was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and an alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but-1-ene.Write equations for the reactions involved.

Exercises | Q 12.1 | Page 378

Arrange the following compounds in increasing order of their property as indicated:

Acetaldehyde, Acetone, Di-tert-butyl ketone, Methyl tert-butyl ketone (reactivity towards HCN)

Exercises | Q 12.2 | Page 378

Arrange the following compounds in increasing order of their property as indicated:

CH3CH2CH(Br)COOH, CH3CH(Br)CH2COOH, (CH3)2CHCOOH, CH3CH2CH2COOH (acid strength)

Exercises | Q 12.3 | Page 378

Arrange the following compounds in increasing order of their property as indicated:

Benzoic acid, 4-Nitrobenzoic acid, 3,4-Dinitrobenzoic acid, 4-Methoxybenzoic acid (acid strength)

Exercises | Q 13.1 | Page 378

Give simple chemical tests to distinguish between the following pairs of compounds

Propanal and Propanone

Exercises | Q 13.2 | Page 378

Give simple chemical tests to distinguish between the following pairs of compounds.

Acetophenone and Benzophenone

Exercises | Q 13.3 | Page 378

Give simple chemical tests to distinguish between the following pairs of compounds.

Phenol and Benzoic acid

 

Exercises | Q 13.4 | Page 378

Give simple chemical tests to distinguish between the following pairs of compounds.

Benzoic acid and Ethyl benzoate

Exercises | Q 13.5 | Page 378

Give simple chemical tests to distinguish between the following pairs of compounds.

Pentan-2-one and Pentan-3-one

Exercises | Q 13.6 | Page 378

Give simple chemical tests to distinguish between the following pairs of compounds.

Benzaldehyde and Acetophenone

Exercises | Q 13.7 | Page 378

Give simple chemical tests to distinguish between the following pairs of compounds:

Ethanal and Propanal

 

Exercises | Q 14.1 | Page 378

How will you prepare the given compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom

Methyl benzoate

Exercises | Q 14.2 | Page 378

How will you prepare the given compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom

m-Nitrobenzoic acid

Exercises | Q 14.3 | Page 378

How will you prepare the given compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom

p-Nitrobenzoic acid

Exercises | Q 14.4 | Page 378

How will you prepare the given compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom

Phenylacetic acid

Exercises | Q 14.5 | Page 378

How will you prepare the given compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom

Exercises | Q 15.1 | Page 378

How will you bring about the following conversions in not more than two steps?

Propanone to Propene

Exercises | Q 15.2 | Page 378

How will you bring about the following conversions in not more than two steps?

Benzoic acid to Benzaldehyde

Exercises | Q 15.3 | Page 378

How will you bring about the following conversions in not more than two steps?

Ethanol to 3-Hydroxybutanal

Exercises | Q 15.4 | Page 378

How will you bring about the following conversions in not more than two steps?

Benzene to m-Nitroacetophenone

Exercises | Q 15.5 | Page 378

How will you bring about the following conversions in not more than two steps?

Benzaldehyde to Benzophenone

Exercises | Q 15.6 | Page 378

How will you bring about the following conversions in not more than two steps?

Bromobenzene to 1-Phenylethanol

Exercises | Q 15.7 | Page 378

How will you bring about the following conversions in not more than two steps?

Benzaldehyde to 3-Phenylpropan-1-ol

Exercises | Q 15.8 | Page 378

How will you bring about the following conversions in not more than two steps?

Benzoic acid to m- Nitrobenzyl alcohol

Exercises | Q 15.8 | Page 378

How will you bring about the following conversions in not more than two steps?

Benazaldehyde to α-Hydroxyphenylacetic acid

Exercises | Q 16.1 | Page 378

Describe Acetylation

Exercises | Q 16.2 | Page 378

Describe Cannizzaro reaction

Exercises | Q 16.3 | Page 378

Describe Cross aldol condensation

Exercises | Q 16.4 | Page 378

Describe Decarboxylation

Exercises | Q 17.01 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.02 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.03 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

 

Exercises | Q 17.04 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.05 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.06 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.07 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.08 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.09 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.1 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 17.11 | Page 379

Complete each synthesis by giving missing starting material, reagent or products

Exercises | Q 18.1 | Page 379

Give plausible explanation for each of the following:

Cyclohexanone forms cyanohydrin in good yield but 2, 2, 6 trimethylcyclohexanone does not.

Exercises | Q 18.2 | Page 379

Give plausible explanation for each of the following:

There are two −NH2 groups in semicarbazide. However, only one is involved in the formation of semicarbazones.

Exercises | Q 18.3 | Page 379

Give plausible explanation for each of the following:

During the preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst, the water or the ester should be removed as soon as it is formed.

Exercises | Q 19 | Page 379

An organic compound contains 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of the compound is 86. It does not reduce Tollens’ reagent but forms an addition compound with sodium hydrogensulphite and give positive iodoform test. On vigorous oxidation it gives ethanoic and propanoic acid. Write the possible structure of the compound

Exercises | Q 20 | Page 379

Although phenoxide ion has more number of resonating structures than Carboxylate ion, Carboxylic acid is a stronger acid than phenol. Give two reasons.

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Chapter 12: Aldehydes, Ketones and Carboxylic Acids

Intext QuestionsExercises

NCERT solutions for Class 12 Chemistry chapter 12 - Aldehydes, Ketones and Carboxylic Acids

NCERT solutions for Class 12 Chemistry chapter 12 (Aldehydes, Ketones and Carboxylic Acids) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Class 12 Chemistry solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 12 Chemistry chapter 12 Aldehydes, Ketones and Carboxylic Acids are Introduction of Aldehydes, Ketones and Carboxylic Acids, Nomenclature of Aldehydes and Ketones, Nature of Carbonyl Group, Preparation of Aldehydes and Ketones, Physical Properties of Aldehydes and Ketones, Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions, Uses of Aldehydes and Ketones, Introduction of Carboxylic Acids, Nomenclature of Carboxylic Acids, Structure of the Carboxyl group, Methods of Preparation of Carboxylic Acids, Physical Properties of Carboxylic Acids, Uses of Carboxylic Acids, Preparation of Aldehydes, Preparation of Ketones, Chemical Reactions of Aldehydes and Ketones - Reduction, Chemical Reactions of Aldehydes and Ketones - Oxidation, Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen, Chemical Reactions of Aldehydes and Ketones - Other Reactions, Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of O-H Bond, Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of C-OH Bond, Chemical Reactions of Carboxylic Acids - Reactions Involving –COOH Group, Chemical Reactions of Carboxylic Acids - Substitution Reactions in the Hydrocarbon Part, Structure of the Carbonyl Group.

Using NCERT Class 12 solutions Aldehydes, Ketones and Carboxylic Acids exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 12 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 12 Aldehydes, Ketones and Carboxylic Acids Class 12 extra questions for Class 12 Chemistry and can use Shaalaa.com to keep it handy for your exam preparation

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