Question # 1

Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution

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White

Red

Yellow

None of these

Which of the following compounds does not react with NaHSO₃?

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C₆H₅CHO

Acetophenone

Acetone

Acetaldehyde

Aldehydes can be distinguished from ketones by using

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Schiff's reagent

Conc. H₂SO₄

Anhy. ZnCl₂

Resorcinol

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

Which of the following is halo form

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CHBr₃

CHCI₃

CHI₃

All of these

In carboxyl group the bond between C and oxygen is:

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Sigma bond

Single bond

Double Bond

Triple bond

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

Ethanal may be converted into a three-carbon acid in a two-step process.

Which compound is the intermediate

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CH₃CO₂H

CH₃CN

CH₃CH₂CN

CH₃CH(OH)CN

Acetaldehyde is used to make

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Rubbber

Antiseptics

Phenolic resin

All of these

Give IUPAC name fo Acetone

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Ethanal

Propanone

Butanone

Propanal

Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre

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Ch₃CHO

CH₃CH₂COCH₂CH₃

CH₃CO₂CH₃

HCHO

Clemensen's reduction of ketones is carried out in

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H₂with Pd catalyst

Glycol with KOH

LiAIH₄in water

Zn-Hg with conc. HCl

Which reagent will distinguish a ketone from an aldehyde

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Br₂

2, 4-dinitrophenylhydrazine

NaBH₄

Tollen's reagent

In formadaldehyde and KOH are heated then we get

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Acetylene

Methane

Methyl alcohol

Ethyl formate

Aldehydes are oxidizes are to give:

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Primary alcohol

Sec-alcohol

Ter-alcohol

Carboxylic acid

Aniline reacts with which of these to form Schiff base?

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Acetic acid

Bezaldehyde

Acetone

NH₃

A compound A has a molecular formula C₂Cl₃OH. It reduces Fehling solution and on oxidation produces a monocarboxylic acid B.A can also be obtained by the action of Cl₂on Ethanol. A is

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Chloral hydrate

CHCl₃

CH₃Cl

Chloroacetic acid

The base used in Cannizzaro's reaction is

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NaOH

KOH

CHI₃

All of these

Which is not true about acetophenone?

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Reacts to form 2,4-dintrophenyl hydrazine

Reacts with Tollen's reagent to form silver mirror

Reacts with I₂/NaOH to form iodoform

On oxidation with alkaline KMnO₄followed by hydrolysis gives benzoic acid

Which of the following is hypnotic?

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Acetaldehyde

Metaldehyde

Paraldehyde

None

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Br_2(aq)

2, 4-dinitrophenylhydrazine

NaBH

Tollen's reagent

Which of the following gives iodoform on heating with a solution of I₂containing Na₂CO₃?

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Ethyl alcohol

Acetone

Ethyl alcohol as well as acetone

Methyl alcohol

Aledehydes ketones can be prepared form alcohols by their:

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Reduction

Oxidation

Decomposition

Synthesis

For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test

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HCHO and CH₃CHO

CH₃CHO and CH₃COCH

CH₃COCH₃and C₆H₅COCH₃

CH₃COOH and CH₃COOCH₃

Which of the following does not turn Schiff's reagent to pink?

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Formaldehyde

Bezaldehyde

Aceton

Methyl chloride

Hydroxyl amine is a derivative of::

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Alcohol

Aldehyde

Ammonia

Ketone

Which reaction yields Bakelite?

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Urea with HCHO

Tetramethyl glycol with Hezamethylene diisocyanate

Phenol and HCHO

Ethylene glycol and Dimethylterephthalate

A common industrial solvent is a mixture of propanone; CH₃COCH₃, and pentyl ethanoate CH₃CO₂(CH₂)₄CH₃. Which reagent would have no effect on this solvent

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Na_(s)

NaBH₄

NaOH_(aq)

2,4-dinitrophenylhydrazine reagent

Reductive ozonolysis of benzene produces

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Acetone

Maleic anhydride

Phthalic acid

Glyoxal

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

Cannizzaro reaction is not given by

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Trimethyl acetaldehyde

Acetaldehyde

Benzaldehyde

Formaldehyde

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ECAT Chemistry Chapter 23 Aldehydes and Ketones Online Test MCQs With Answers

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