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Karnataka Board PUCPUC Science 2nd PUC Class 12

PUC Science 2nd PUC Class 12 - Karnataka Board PUC Important Questions for Chemistry

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Chemistry
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Write the product in the following reaction

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

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: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> 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: Acids >> 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: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> 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: Acids >> 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: Acids >> Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of C-OH Bond

Write the structure of p-methylbenzaldehyde.

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> Structure of the Carbonyl Group

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

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> Structure of the Carbonyl Group

Write the structure of 2-hydroxybenzoic acid.

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

Complete the following reactions:

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

Complete the following reactions:

 

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

Give the structures of A, B and C in the following reactions:

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Chemical Reaction of Diazonium Salts - Reactions Involving Displacement of Nitrogen

Write the major products(s) in the following:

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Importance of Diazonium Salts in Synthesis of Aromatic Compounds

Distinguish between the following pairs of compounds: Aniline and N-methylaniline

 

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Identification of Primary, Secondary and Tertiary Amines

Write the structures of main products when benzene diazonium chloride `(C_6H_5N_2^(+)Cl^-)`reacts with the following reagents:

CuCN/KCN

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Chemical Reaction of Diazonium Salts - Reactions Involving Displacement of Nitrogen

Write the structures of main products when benzene diazonium chloride `(C_6H_5N_2^(+)Cl^-)`reacts with the following reagents:

H2O

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Chemical Reaction of Diazonium Salts - Reactions Involving Displacement of Nitrogen

Write the structures of main products when benzene diazonium chloride `(C_6H_5N_2^(+)Cl^-)`reacts with the following reagents:

CH3CH2OH

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Chemical Reaction of Diazonium Salts - Reactions Involving Displacement of Nitrogen

Arrange the following:

Aniline, p-nitroaniline, p-methylaniline - in the increasing order of their basic strength

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Basic Character of Amines

Why does NH3 act as a Lewis base?

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Basic Character of Amines
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