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Aldehydes and Ketone

Total questions: 74

Worksheet time: 37mins

Name
Class
Date
1.

The class of compounds containing C=O are called

a)

Aldehydes

b)

Ketones

c)

Carbonyl Compounds

d)

None of the Above

2.

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

a)

Phenol

b)

Carboxylic acid

c)

Aldehydes

d)

Alcohols

3.

Acetophenone is prepared from

a)

Friedel craft reaction

b)

Rosenmund reaction

c)

Sandmayer reaction

d)

Wurtz reaction

4.

The Clemmenson reduction of acetone yields

a)

Ethanol

b)

Ethanal

c)

Propane

d)

Propanol

5.

Aldehydes and Ketones can be prepared from

a)

Acid Chlorides

b)

Nitriles

c)

Both of them

d)

None of the above

6.

Catalyst SnCl / HCl 2 is used in

a)

Stephen's reduction

b)

Cannizzaro reaction

c)

Clemmensen's reduction

d)

Rosenmund's reduction

7.

Ketones are prepared by

a)

Clemmensen's reduction

b)

Cannizzaro reaction

c)

Rosenmund's reduction

d)

Oppenaur's oxidation

8.

Which of the following will undergo aldol condensation

a)

Acetaldehyde

b)

Propanaldehyde

c)

Benzaldehyde

d)

Trideuteroacetaldehyde

9.

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

10.

Which of the following will not give the iodoform test

a)

Acetophenone

b)

Ethanal

c)

Benzophenone

d)

Ethanol

11.

What observations would you expect to see in a positive Fehlings test for an aldehyde?

a)

blue solution to brick-red solution

b)

blue solution to brick-red solid

c)

blue solid to brick-red solid

d)

blue solid to brick-red solution

12.

When reacted with a strong reducing agent, aldehydes turn into

a)

primary alcohols

b)

secondary alcohols

c)

ketones

d)

carboxylic acids

13.

Classify the compound based on the functional group present.

a)

aldehyde

b)

carboxylic acid

c)

ketone

d)

alcohol

14.

Name this aldehyde.

(a)  

15.

The class of compounds containing C=O are called

(a)  

16.

Potassium dichromate is an oxidizing agent which can be used to completely oxidize an aldehyde. What is the product of this reaction?

(a)  

17.

What is the catalyst in the reaction of reducing an aldehyde?

What is the product?

(a)  

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.

With which two chemical reactions can we identify an aldehyde from a ketone?

(a)  

20.

How could you prepare this compound: (propanal)?

         

a)

Reduce

butanoic acid

b)

Oxidize

propan-2-ol

c)

Oxidize

propan-2-one

d)

Oxidize

propan-1-ol

21.

Prepare methanal from ethene.

4 lines
22.

Give two examples of natural aldehydes.



(a)  

23.

Name two uses of aldehydes.

(a)  

24.

Two physical properties of aldehydes are:

a)

They can form hydrogen bonds

b)

Higher boiling points than hydrocarbons and alcohols of similar molecular weight.

c)

Higher boiling points than hydrocarbons; but  lower than alcohols of similar molecular weights.

d)

Aldehydes with high molecular weight are soluble in water.

25.

Write the chemical reaction for adding Grignard's reagent to propanal.

4 lines
26.

Name this compound

(a)  

27.



(a)  

28.



(a)  

29.
a)

3-formylpentanal

b)

4-formylbutanodial

c)

3-ethylbutanodial

d)

4-formylbutanol

30.

Which aldehyde is a gas a room temperature?

a)

Benzaldehyde

b)

Cetaldehyde

c)

Formaldehyde

d)

None

31.

The general formulas for aldehydes:

a)

CnH2n+1COH

b)

CnH2n+2COH

c)

R-COH

d)

CnH2nO

e)

R-H-COH

32.

Where we use higher aldehydes

a)

as disinfectant

b)

production of furniture

c)

production of esters

d)

in perfumery

33.

Choose the simplest aldehyde:

a)

Methanal

b)

Ethanal

c)

Benzaldehyde

d)

Formaldehyde

34.

A colorless poisonous liquid under standard conditions, a colorless gas with a pungent odor similar to the smell of rotten apples at room temperature, readily soluble in water, alcohol, ether. What is it?

a)

Propanal

b)

Formaldehyde

c)

Acetaldehyde

d)

Butanal

35.

How does the carbon atom of the carbonyl group hybridize?

a)

sp3

b)

sp, sp2

c)

sp2

d)

sp3

e)

sp, sp3

36.

Что производится в реакции Толленса как осадок?

a)

Cr

b)

Ag

c)

Cu2O

d)

Ni

37.

Aldehyde which can have a very pleasant smell?

a)

Ethanal

b)

Methanal

c)

Heptanal

d)

Pentanal

38.

A gas that is highly soluble in water and has a pungent smell

a)

Methanal

b)

Acetaldehyde

c)

Propanal

d)

Formaldehyde

39.

Which solution of aldehyde can be used as a disinfectant?

a)

Formaldehyde with a 55-60%

b)

Formaldehyde with a 30%

c)

Formaldehyde with a 40%

d)

Formaldehyde with a 50%

40.

Name this compound:

a)

Pentane

b)

2-ethyl propanal

c)

Propanal

d)

Butanal

41.

Acetophenone is prepared from

a)

Friedel craft reaction

b)

Rosenmund reaction

c)

Sandmayer reaction

d)

Wurtz reaction

42.

Aldehydes and Ketones can be prepared from

a)

Acid Chlorides

b)

Nitriles

c)

Both of them

d)

None of the above

43.

Catalyst SnCl2/ HCl is used in

a)

Stephen's reduction

b)

Cannizzaro reaction

c)

Clemmensen's reduction

d)

Rosenmund's reduction

44.

Which of these can an ester be used for (select however many are correct)?

a)

As an oxidising agent

b)

In food flavourings

c)

In perfumes

d)

As a cleaning substance

45.

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

46.

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

47.

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

48.

When reacted with a strong oxidising agent, aldehydes turn into

a)

carboxylic acids

b)

ketones

c)

primary alcohols

d)

secondary alcohols

49.
Propanone is very soluble in water because
a)
it is non-polar
b)
it can form hydrogen bond with water molecule
c)
water is a polar solvent
d)
the dipole-dipole interactions are weak between propane and water
50.

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

a)
b)
c)
d)
51.

Which one(s) of given statements is/are correct?

a)

Aldehydes can be oxidized to carboxylic acids.

b)

Ketones can be oxidized to carboxylic acids.

c)

Aldehydes can be reduced to alcohols.

d)

Aldehydes can be reduced to ketones.

52.

What type of hybridization occurs in carbon atom of the carbonyl group of aldehydes and ketones?

a)

sp

b)

sp2

c)

sp3

d)

sp3d2

53.
Carbonyl compounds CANNOT be synthesized through
a)
ozonolysis of alkenes
b)
oxidation of 1° alcohol
c)
oxidation of 2° alcohol
d)
esterification
54.

Choose the name reaction that produces benzaldehyde from Toluene and Chromyl chloride.

a)

Aldol condensation

b)

Gattermann Koch reaction

c)

Etard reaction

d)

Clemmensen reduction

55.

Which of the following is used in Rosenmund reduction?

a)

LiAlH4

b)

H2 /Pd-BaSO4

c)

Na/Ethanol

d)

NaBH4

56.

When nucleophilic addition to the carbonyl group occurs, the carbon attacked undergoes what hybridization change?

a)

sp2 to sp3

b)

sp to sp2

c)

sp to sp3

d)

sp2 to sp

57.

When the carbonyl group of a neutral ketones get protonated:

a)

the resulting species becomes more electrophilic

b)

the resulting species becomes less electrophilic

c)

the resulting species carries negative charges

d)

the resulting species is deactivated towards nucleophilic attacked

58.

Oxidation of secondary alcohol with chromic acid results in the production of ............

a)

an ester

b)

a ketone

c)

an aldehyde

d)

an alcohol

59.

Name the following compound.

(a)  

60.

Reaction of aldehydes with primary amine will results in the formation of

a)

an oxime

b)

an ester

c)

an imine

d)

an enamine

61.

Name the following compound

(a)  

62.

LAH cannot be used to convert carboxylic acid to the corresponding aldehyde because

a)

LAH is not reactive

b)

RCOOH is converted to RCOOLi

c)

RCOOH is converted into R2C=O

d)

RCOOH is reduced to RCH2OH

63.

Predict the product of the following reaction

a)
b)
c)
d)
64.

What is the reactant W in the synthesis below

a)

cyclopentanone

b)

cyclopentene

c)

cyclopentanol

d)

bromocyclopentane

65.

Which of the following compound is acetal?

a)

I

b)

II

c)

III

d)

IV

66.

Name the functional group: C=O

a)

carbonyl

b)

hydroxyl

c)

alkyl

d)

halogen

67.

Choose the carbonyl compounds ...

a)

Aldehyde and ketone

b)

Alcohol and ketone

c)

halogenalkanes

d)

alkane and alkene

68.

Name the compound:

a)

methylpropylketone

b)

methylpropylaldehyde

c)

pentanal

d)

butanone-2

69.

Choose the qualitative test to aldehydes...

a)

Silver mirror test

b)

Bromine water test

c)

combustion test

d)

Soluability in water

70.

Do the aldehydes and ketones go to the hydrogenation reaction?

a)

Only aldehydes

b)

Only ketones

c)

Both of them

d)

None of them

71.

Ketones oxidize to carboxylic acid.

a)

True

b)

False

c)

I don't know

72.

Do aldehydes and ketone dissolve in water?

a)

Only lower number

b)

Only higher numbers

c)

They have good soluability

d)

None of them

73.

Aldehydes and ketones are interclass isomers.

a)

True

b)

False

c)

I don't kow

74.

Choose the product of aldehydes hydrogenation?

a)

primary alcohol

b)

secondary alcohol

c)

tertiary alcohol

d)

no reaction

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