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Science (English Medium) Class 12 - CBSE Important Questions for Chemistry

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How will you bring about the following conversions?

Propanone to propane

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Reduction

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

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of O-H Bond

Complete the following reactions:

 

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Other Reactions

Write the structures of A and B in the following reactions:

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Preparation of Aldehydes and Ketones

Write the structures of A and B in the following reactions

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Methods of Preparation of Carboxylic Acids

Distinguish between: CH3COOH and HCOOH

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Oxidation

Arrange the following in the increasing order of their boiling points: CH3CHO, CH3COOH, CH3CH2OH

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Physical Properties of Aldehydes and Ketones

Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction:

C6H5COCH3, CH3-CHO, CH3COCH3

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions

A and B are two functional isomers of compound C3H6O.On heating with NaOH and I2, isomer B forms yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the formulae of A and B.

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Oxidation

Name the reagents used in the following reactions:

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of C-OH Bond

Predict the products of the following reactions:

 

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions

Predict the products of the following reactions:

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Methods of Preparation of Carboxylic Acids

Predict the products of the following reactions:

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of C-OH Bond

Write the structure of 2-hydroxybenzoic acid.

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Nomenclature of Carboxylic Acids

Show how the following compound can be converted to benzoic acid.

Phenylethene (Styrene)

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Methods of Preparation of Carboxylic Acids

Write the reactions involved in the following reactions: Clemmensen reduction

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Other Reactions

Write the reactions involved Hell-Volhard Zelinsky reaction?

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of O-H Bond

Write the reactions involved Decarboxylation reaction

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Carboxylic Acids - Reactions Involving –COOH Group

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

Butanal and Butan-2-one

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Nomenclature of Aldehydes and Ketones

Complete the following reactions:

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Other Reactions
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