Question # 1

Which of the following has highest boiling point

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Methanal

Ethanal

Propanal

2-hexanone

To product aldehyde group against alkaline oxidizing agent.

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It is reduced in the presence of catalyst

An acetal is formed

It is oxidized

It is treated with aqueous NaBH4

On heating aldehydes with Fehling's solution we get a precipitate whose colour is

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Pink

Black

Yellow

Brick red

When benzaldehyde is converted to benzyl alcohol by reading with NaOH the reaction is known as.

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Cannizzaro reaction

Wurtz reaction

Wol;ficisthner reaction

Aldol reaction

All of the following tests are used to identify aldehydes except.

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Tollen's test

Fehling test

Baeyer's test

Benedict test

Acetaldehyde reacts usually with

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Electrophiles only

Nucleophiles only

Electrophiles and nucleophiles

Free radicals only

Which reaction is disproportionate reaction

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Aldol Condensation

Cannizzaros's reaction

Haloform reactions

Acid Catalyzed reactions

Which of the following compounds will not give Iodoform test on treatment with I₂/ NaOH

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Acetaldehyde

Acetone

Butanone

3-Pentanone

Silver mirror test is given by

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Ethers

Ketones

Acids

Aldehydes

Aldehydes and ketones can be defected by

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2, 4 DNPH test

Tollen's test

Sodium Nitro prusside test

Benedicts solution test

when aldehydes react with Tollen's reagent.

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A ketone is produced

An alcohol is produced

Ag ions are produced

Ag ions are reduced

Aldehyde react with hydroxyl amine in acidic solution to give

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An oxime

Aldol

Polymer

Acetic acid

Acetaldehyde can be prepared by the oxidation of.

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Acetic acid

Ethanol

1- Proponal

Ethanonic acid

Which one of the following compounds undergoes Cannizzaro's Reaction.

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Acetaldehyde

Benzaldehyde

Acetone

Propionaldehyde

Formalin is a 40% solution of

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CH₃CHO

CH₃OH

HCHO

CH₃OCH

A cyanohydrin is formed by the reaction of

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Alcohol and HCN

Ketone and NH3

Aldehyde and NH2OH

Aldehyde and HCN

Which of the following reagents will reacts with both aldehydes and ketones.

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Grignard reagent

Tollens's reagent

Fehling's reagent

Benedict 's reagent

Paraldehyde is polymer of.

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HCHO

CH3CHO

CH3COCH3

CH3CH2-CH2OH

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