Question # 1

Which one of the following compound does not react with NaOH and I2 and also does not form Iodoform.

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C2H5OH

CH3CHO

CH3-CO-CH3

C2H5-O-C2H5

Which reaction is disproportionate reaction

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Aldol Condensation

Cannizzaros's reaction

Haloform reactions

Acid-catalyzed reactions

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

Which is most difficult to be oxidized

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CH₃CHO

CH₃COCH₃

HCHO

C₂H₅CHO

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

Which substance is used for silvering of mirror.

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Acetaldehyde

Ethanol

Ethylene glycol

Acetone

Aldehyde react with hydroxyl amine in acidic solution to give

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An oxime

Aldol

Polymer

Acetic acid

Cannizzaro's reaction is not given by

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Formaldehyde

Acetaldehyde

Benzaldehyde

Trithylacetaldehyde

Common names of aldehydes are derived from the common names of.

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Alcohol

Ketones

Carboxylic acids

Alkenes

Acetaldehyde undergoes, aldol condensation in the presence of.

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dil HNO3

DIL NaOH

dil HCl

Conc. H2SO4

Silver mirror test is given by

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Ethers

Ketones

Acids

Aldehydes

Acetone reacts with HCN to form cyanohydrin it is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic subtitution

Which of the following has highest boiling point

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Methanal

Ethanal

Propanal

2-hexanone

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

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Acetaldehyde

Acetone

Butanone

3-Pentaneone

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

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Pink

Black

Yellow

Brick red

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

Formalin is

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10% solution of formaldehyde in water

20% solution of formaldehyde in water

40% solution of formaldehyde in water

60% solution of formaldehyde in water

Which can produce ketone

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Sec alcohol

Calcium acetate

Propyne

All of these

Predict the product or reaction.

Acetaldehyde +NaOH

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An aldol

Acetic acid

Ethanol

Paraldehyde

All of the followings react with Fehling solution except

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CH2CH2CHO

CH3-CH2COCH3

HCHO

CH3-CHO

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