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Science (English Medium) Class 12 - CBSE Important Questions

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Complete the following:

\[\ce{C6H5NO2 ->[Sn/HCl] A ->[Br2/H2O] B ->[NaNO2/HCl][273 - 278 K] C ->[HBF4][Δ] D}\]

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

Which of the following tests/reactions is given by aldehydes as well as ketones?

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

The oxidation of toluene to benzaldehyde by chromyl chloride is called ______.

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

Write the reaction and IUPAC name of the product formed when 2-Methylpropanal (isobutyraldehyde) is treated with ethyl magnesium bromide followed by hydrolysis.

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

Write the equations for the following reaction:

Salicylic acid is treated with acetic anhydride in the presence of conc H2SO4

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

A hydrocarbon (A) with molecular formula C5H10 on ozonolysis gives two products (B) and (C). Both (B) and (C) give a yellow precipitate when heated with iodine in presence of NaOH while only (B) give a silver mirror on reaction with Tollen’s reagent.

  1. Identify (A), (B) and (C).
  2. Write the reaction of B with Tollen’s reagent.
  3. Write the equation for iodoform test for C.
  4. Write down the equation for aldol condensation reaction of B and C.
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

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

Ethanal, Propanone, Propanal, Butanone (reactivity towards nucleophilic addition)

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

Write the IUPAC name of the following complex:

K2[PdCl4]

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

Explain the following reactions:

Clemmensen reaction

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 - Reduction

Explain the following reactions:

Stephan reaction

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

Write the IUPAC name of the following complex:

[Pt(NH3)6]Cl4

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

Using IUPAC norms, write the formula for the following:

Pentaamminenitrito-N-Cobalt (III)

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

Using IUPAC norms write the formula for the following:

Tetrahydroxidozincate (II)

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

Predict the reagent for carrying out the following transformations:

Benzoyl chloride to Benzaldehyde

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

Predict the reagent for carrying out the following transformations:

Ethanal to 3-hydroxy butanal

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 - Reactions Due to α-hydrogen

Which of the following does not give aldol condensation reaction?

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 - Reactions Due to α-hydrogen

Which of the following does not give Cannizzaro reaction?

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

Aldehydes and ketones react with hydroxylamine to form ______.

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

The reagent that can be used to distinguish acetophenone and benzophenone is ______.

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

Which of the following compounds will undergo self-condensation in the presence of dilute NaOH solution?

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 - Reactions Due to α-hydrogen
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