Question # 1

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

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Ch₃CHO

CH₃CH₂COCH₂CH₃

CH₃CO₂CH₃

HCHO

Compounds X, Y and Z, all react with PCI₅to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z

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Self condensation of acetaldehyde in the presence of dilute alkalies gives

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An acetal

An aldol

Mesitylene

Propionaldehyde

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

Which of the following will have the highest boiling point

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Methanol

Ethanol

Propanal

2-hexanone

Ketones are reduced to

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Primary alcohol

Secondary alcohol

Tertiary alcohol

All of these

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

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NCHO

CH₃COOH

CH₃CH₂COOH

C₆H₅COOH

Wacker method involves the conversion of alkene using PdCl₂into corresponding

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Alcohol

Ketone

Aldehyde

Ether

Ketones are prepared by the oxidation of:

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

In carboxyl group the bond between C and oxygen is:

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Sigma bond

Single bond

Double Bond

Triple bond

Carboxyl compounds have functional group:

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R-C-X

R-CH=O

RCOR

All

Which of the following reagents is used to distinguish acetone and acetophenone

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NaHSO₃

Grinard reagent

Na₂SO₄

NH₄Cl

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

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

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

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HCHO

CH₃CHO

CH₃COCH₃

CO₂

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

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CH₃CH(OH)COOH

CH₃CH₂CH(OH)COOH

(CH₃)₂C(OH)COOH

CH₃CH₂CH₂COOH

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

Cannizzaro's reaction is type of reaction:

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Self oxidation-reduction reaction

Disproportion reaction

Addition

A and B

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

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Cyanohydrin of which of the following forms lactic acid

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HCHO

CH₃COCH₃

CH₃CHO

CH₃CH₂CH₂CHO

Aldehydes are produce in atmosphere by

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Oxidation of secondary alcohols

Reduction of alkenes

Reaction of oxygen atoms with hydrocarbons

Reaction of oxygen atoms with ozone

Iodoform test is given by:

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Formaldehyde and Higher ketones

Formaldehyde

Acetaldehyde and methyl ketones

Acetaldehyde

Distillation of calcium salts of acetic acid and formic acids gives acetaldehyde. What compound would be obtained if only calcium salt of acetic acid is distilled

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Formaldehyde

Butyraldehyde

Propionaldehyde

Acetone

Aldehydes are oxidizes are to give:

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Primary alcohol

Sec-alcohol

Ter-alcohol

Carboxylic acid

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

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The color of ppts formed by Benedirct's test is

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Brick red

Wine red

Yellow

Orange

Acetaldehyde is used to make

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Rubbber

Antiseptics

Phenolic resin

All of these

Aldehydes is distinguished from ketones by using

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Tollen's reagent

Benedict reagent

Fehling solution

All of the above

Aniline reacts with which of these to form Schiff base?

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Acetic acid

Bezaldehyde

Acetone

NH₃

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

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