Question # 1

Which of the following in incorrect?

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FelCl₃is used in the detection of phenols

Fehling solution is used in the detection of glucose

Tollen's reagent is used in detection of unsaturation

NaHSO₃is used in the detection of carbonyl compounds

Which isomer of C₅H₁₁OH gives, one dehydration, the greastest number of different alkenes

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In Tolten's best, the end product is ______ formed

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White ppts

Red ppts

Yellow ppts

Silver mirror

Which of the following react with NaOH to produce an acid and an alcohol?

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NCHO

CH₃COOH

CH₃CH₂COOH

C₆H₅COOH

Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent

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Butan-1-ol

Butan-2-ol

2-methylpropan-1-ol

2-methylpropan-2-ol

Aldehydes is distinguished from ketones by using

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Tollen's reagent

Benedict reagent

Fehling solution

All of the above

On adding sodium nitroprusside ketones give

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Red

Wine red

White

Orange

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Q and R Q and R

R only Q and R

Q and R R only

Q only R only

Which of the following compounds will react with reagent ?

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CH₃ CO H

CH₃ CO CH₃

CH_{3 COOH}

CH₃CO CH₂CH₃

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

Ketons are prepared by the oxidation of

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

Hydroxyl amine is a derivative of::

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Alcohol

Aldehyde

Ammonia

Ketone

C₂H₅CHO and (CH₃)₂CO can be distunguished by testing with

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Phenyl hydrazine

Hydroxylamine

Fehling solution

Sodium bisulphate

Acetone is oxidized with

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Tollen's reagent

Fehling solution

Acidic dichromate solution

Benedicts solution

Reaction of Grignard's reagent with formaldehyde gives:

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pri-alcohol

sec-alcohol

ter-alcohol

carboxylic

Which is used for the reduction of aldehydes and ketones

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NaBH₄

Pt/Pd

Ni

All of these

Formula of acetone is:

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HCHO

CH₃CHO

CH₃OCH₃

CH₃OC₂H₅

A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI₅in the cold What could R be

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Which one of the following statement is wrong regarding differences between aldehydes and ketones

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Aldehydes undergo reduction to form primary alcohols while ketones undergo reduction to form secondary alcohols

Aldehydes undergo oxidation to form acids having less number of carbon atoms while ketones undergo oxidation to form acids having same number of carbon atoms

Aldehydes give positive silver mirror test while ketones give negative -mirror test

Aldehydes can undergo polymerization while ketones cannot undergo polymerizarion

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

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Aldol condensation

Reimer Tiemann reaction

Cannizaaor's reaction

Wolf-kishner reduction

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

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

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