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Aldehyde and Ketones

Total questions: 50

Worksheet time: 34mins

Name
Class
Date
1.

Which of the following is mandatory for aldol condensation reaction

a)

presence of alpha hydrogen

b)

absence of alpha hydrogen

c)

presence of beta hydrogen

d)

absence of beta hydrogen

2.

Benzaldehyde on nitration gives

a)

o-nitrobenzaldehyde

b)

p-nitrobenzaldehyde

c)

m-nitrobenzaldehyde

d)

ortho and para dinitrobenzaldehyde

3.

The compound with the highest acidity in the following is

a)

4-methylbenzoic acid

b)

benzoic acid

c)

2-nitrobenzoic acid

d)

4-nitrobenzoic acid

4.

The reagent that does NOT oxidize aldehyde is

a)

CrO3

b)

acidic K2Cr2O7

c)

Ag2O

d)

alkaline KMnO4

5.

When reacted with a strong oxidising agent, aldehydes turn into

a)

carboxylic acids

b)

ketones

c)

primary alcohols

d)

secondary alcohols

6.

Which of the following alcohols can be oxidized to a ketone?

a)
b)
c)
d)
7.

Name this molecule:

a)

Propanone

b)

Propanal

c)

Butanone

d)

Butanal

8.
Aldehyde reacts with Tollen's reagent forming:
a)
Yellow precipitate
b)
Brick-red precipitate
c)
Purple solution
d)
Silver mirror
9.

2-butanol heated with acidified KMnO4 solution produced

a)

butanone

b)

butanoic acid

c)

butene

d)

butane

10.

Identify the functional group present in this compound.

a)

aldehyde

b)

ketone

c)

carboxylic acid

d)

ester

11.

Chemicals that contain a ketone functional group will end with....

a)

-al

b)

-ol

c)

-one

d)

-oic acid

12.

___________ commonly known as formaldehyde, was used as a biological preservative.

a)

Acetone

b)

Propanone

c)

Ethanol

d)

Methanal

13.

If ethanol is oxidised under reflux, the product will be

a)

Ethanoic Acid

b)

No Reaction

c)

Ethanone

d)

Ethanal

14.

Tollens' reagent shows the following colour change in a ketone

a)

Colourless to silver mirror

b)

Blue to brick red

c)

Stays colourless

d)

Stays blue

15.

Tollens' reagent shows the following colour change in an aldehyde

a)

Colourless to silver mirror

b)

Stays colourless

c)

Blue to brick red

d)

Stays blue

16.

Primary alcohols are oxidised to

a)

Ketones

b)

Carboxylic acids then aldehydes

c)

Aldehydes then carboxylic acids

d)

No reaction

17.

When reacted with a strong reducing agent, aldehydes turn into

a)

primary alcohols

b)

secondary alcohols

c)

ketones

d)

carboxylic acids

18.

Which of the following compounds reduces Ag+ ions to metallic Ag in ammoniacal silver nitrate solution?

a)

Aldehydes

b)

Ketones

c)

Carboxylic acids

d)

Alquenes

19.
a)

3-formylpentanal

b)

4-formylbutanodial

c)

3-ethylbutanodial

d)

4-formylbutanol

20.

Which aldehyde is a gas a room temperature?

a)

Benzaldehyde

b)

Cetaldehyde

c)

Formaldehyde

d)

None

21.

The functional group of aldehydes and ketones is

a)

carboxyl

b)

carbonyl

c)

hydroxyl

d)

carboalkoxy

22.

What is the IUPAC name of the compound given:

a)

2-pentanone

b)

5-pentanone

c)

hexanone

d)

2-hexanone

23.

Choose a FALSE statement about carbonyl compounds.

a)

Ketones can easily undegoes oxidation reaction

b)

Aldehydes are more reactive to undergoes nucleophilic addition compared to ketones

c)

Carbonyl is the functional group of aldehydes and ketones

d)

Structure of ketone consist of carbon carbonyl which attach to two alkyl/aryl groups

24.

Conversion of aldehyde to alcohol is

a)

Oxidation reaction

b)

Reduction reaction

c)

Esterification reaction

d)

Polymerisation reaction

25.

One of the nucleophilic addition of carbonyl compound is reaction with alcohol. The product form when ketone reacts by this reaction is

a)

acetal

b)

ketal

c)

hemiacetal

d)

hemiketal

26.

An aliphatic aldehydes gives positive result in Fehlings' test. It shows the formation of

a)

Silver mirror on the wall of test tube

b)

Light Yellow precipitate

c)

Brick-red precipitate

d)

Orange precipitate

27.

The product formed in Aldol condensation is

a)

an alpha, beta - unsaturated ester

b)

a beta hydroxy acid

c)

a beta hydroxy aldehyde or ketone

d)

an alpha hydroxy aldehyde or ketone

28.

Which of the following is used in Rosenmund reduction?

a)

LiAlH4

b)

H2 /Pd-BaSO4

c)

Na/Ethanol

d)

NaBH4

29.

Which reagent would you choose to convert 1-pentanol to pentanal?

a)

PCC in CH2Cl2

b)

K2Cr2O7 with aqueous H2SO4

c)

KMnO4 with aqueous H2SO4

d)

KOH, ethanol, reflux

30.

The only aldehyde that gives positive result with I2/NaOH is

a)

Butanal

b)

2-methylpropanal

c)

Ethanal

d)

Propanal

31.

Below are the reagents and conditions used for reduction except

a)

LiAlH4 ii. H3O+

b)

KMnO4, H+, heat

c)

NaBH4, Methanol

d)

H2, Pt

32.

What is the structural formula when cyclopentanone reacts with KCN, HCl

a)
b)
c)
d)
33.

Carbonyl compounds that give pale yellow precipitate with iodoform test must have contains..

a)

methyl carbinol group

b)

methyl carbonyl group

c)

carboxyl group

d)

carboalkoxy group

34.

The structure of 3-methyl-4-hydroxyhexanal is :

a)
b)
c)
d)
35.

Which structural formula is of 2,4-DNPH, a reagent to confirm the presence of carbonyl group.

a)

A

b)

B

c)

C

d)

D

36.

Adding alcohols to aldehydes gives

a)

Esters

b)

Carboxylic acids

c)

Ketones

d)

Hemiacetals & Acetals

37.

Adding alcohols to ketones gives

a)

Hemiacetals & Acetals

b)

Carboxylic acid

c)

Hemiketals & Ketals

d)

Water

38.
Select carbonyl compounds from the following formulae:
a)
C4H10O
b)
C4H8O
c)
C4H8O2
d)
C4H8
39.

What is the name for the compound shown?

a)

5-iodopentan-3-one

b)

5-iodopentan-2-one

c)

1-iodopentan-3-one

d)

1-iodopentan-2-one

40.

Give the IUPAC name for the following compound

a)

2-methyl-3-butanone

b)

3-methyl-3-butanone

c)

3-methyl-2-butanone

d)

3-methylbutanone

41.

What is the name of the mechanism when KCN (in acidic conditions) reacts with propanal?

a)

Free radical substitution

b)

Nucleophilic substitution

c)

Nucleophilic addition

d)

Electrophilic addition

42.

Name this molecule:

a)

Pentanoic acid

b)

2-hydroxy-2-methylbutan3-one

c)

3-hydroxy-3-methylbutane-2-one

d)

2-oxo-3-methylbutan-3-ol

43.

What will be formed if butanone is reacted with LiAlH4 in dry ether?

a)

Butanoic acid

b)

Butan-1-ol

c)

Butan-2-ol

d)

Butanal

44.

Acetophenone is prepared by

a)

Friedel craft reaction

b)

Rosenmund reaction

c)

Sandmayer reaction

d)

Wurtz reaction

45.

The Clemmenson reduction of acetone yields

a)

Ethanol

b)

Ethanal

c)

Propane

d)

Propanol

46.

Which of the following compounds does not contain an OH group

a)

Phenol

b)

Carboxylic acid

c)

Aldehydes

d)

Alcohols

47.

Catalyst SnCl2/ HCl is used in

a)

Stephen's reduction

b)

Cannizzaro reaction

c)

Clemmensen's reduction

d)

Rosenmund's reduction

48.

Ketones are prepared by

a)

Clemmensen's reduction

b)

Cannizzaro reaction

c)

Rosenmund's reduction

d)

Oppenaur's oxidation

49.

Which one of the following pairs is not correctly matched

a)

C=O_Clemmensons reduction_> >CH2

b)

>C=O Wolf Kishner Reduction> >CHOH

c)

-COCl Resunmund's reduction> - CHO

d)

-C = N Stefen's Reduction> -CHO

50.

Which of the following will not give the iodoform test

a)

Acetophenone

b)

Ethanal

c)

Benzophenone

d)

Ethanol

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