Question # 1

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 of the following is halo form

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CHBr₃

CHCI₃

CHI₃

All of these

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With H₂/Ni CH₃(CH₂)₅CH₂OH

With H₂/Ni CH₃(CH₂)₅CH₃

With NaBH₄ CH₃(CH₂)₅CH₂OH

With NaBH₄ CH₃(CH₂)₅CHO

Acetone is oxidized with

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Tollen's reagent

Fehling solution

Acidic dichromate solution

Benedicts solution

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

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White

Red

Yellow

None of these

Acetone reacts with HCN to form a cyanohydrin. It is an example of:

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

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

The color of ppts formed by Benedirct's test is

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Brick red

Wine red

Yellow

Orange

Wacker method involves the conversion of alkene using PdCl₂into corresponding

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Alcohol

Ketone

Aldehyde

Ether

The carbon atom of a carbonyl group is

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Sp hybridized

Sp²hybridized

Sp³hybridized

None of these

Aledehydes ketones can be prepared form alcohols by their:

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Reduction

Oxidation

Decomposition

Synthesis

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

A compound possessingα-hydrogen atom, in the presence of dilute alkali formsβ-hydroxy aldehyde. This product on heating with dilute acid forms an unsaturated crotonaldehyde. The compound is

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CH₃CHO

CH₃CH₂CHO

CH₂= CH - CHO

HC = C - CHO

An organic compound 'A' has the molecular formula C₃H₆O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C₉H₁₄O. A and B, respectively are

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Propanal and mesitylene

Propanone and mesityl oxide

Propanone and 2, 6-dimethyl-2,5-heptadien-4-one

Propanone and mesitylene oxide

Ketones are reduced to

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Primary alcohol

Secondary alcohol

Tertiary alcohol

All of these

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

Which reagent will distinguish a ketone from an aldehyde

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Br₂

2, 4-dinitrophenylhydrazine

NaBH₄

Tollen's reagent

Aldehydes which do not haveα-hydrogen undergo

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Aldol combination

Cannizzaro's reaction

Substitution

Elimination

Aniline reacts with which of these to form Schiff base?

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Acetic acid

Bezaldehyde

Acetone

NH₃

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

Hydroxyl amine is a derivative of::

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Alcohol

Aldehyde

Ammonia

Ketone

Acetal is produced by reacting alcohol in the presence of dry HCl with

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Acetaldehyde

Ketone

Ether

Carboxylic acid

Which is mild oxidizing agent ?

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Tollen's reagent

KMnO₄ / H₂SO₄

K₂Cr₂O₇ / H₂SO₄

HNO₃

Reduction of aldehydes with HI and P gives

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Primary alcohols

Secondary alcohols

Alkanes

Tertiary alcohols

Isopropyl alcohol on oxidation forms

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Acetone

Ether

Ethylene

Acetaldehyde

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Treatment with HCN followed by acid hydrolysis

Oxidation of acetaldehyde followed by basic hydrolysis

Treatment with HCN followed by reduction

Treatment with HCN followed by oxidation

Chromyl chloride and toluene react to produce

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p-chlorotoluene

Benzaldehyde

Benzyl chloride

Bezoic acid

A nucleophilic reagent will readily Attack

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Ethylene

Ethanal

Ethanol

Ethylamine

During the mechanism of aldol condensation a/an ______ is formed

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Oxide

Alkali

Alkoxide ion

None of these

Self condensation of acetaldehyde in the presence of dilute alkalies gives

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An acetal

An aldol

Mesitylene

Propionaldehyde

Which of these reactions is shown by buranone, CH₃COCH₂CH₃

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On warming with acidified potassium dichromative (IV) the solution turns green

On heating with Fehling's reagent a red precipitate is formed

With 2,4-dinitrophenlhydrazine reagent an orange precipitate is formed

With hydrogen cyanide an aldehyde is formed

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