Ketone Functional Group


 
 
Concept Explanation
 

Ketone Functional Group

Carbonyl or ketone group (> CO) :

Organic compounds containing > CO as the functional group are called ketones. For example, Propanone  (CH_3COCH_3) is a ketone.

Nomenclature: 

IUPAC:

.Fistly choose the longest chain a the parent chain.

. Indicate the presence of ketone by replacing suffix 'e' of the alkane with the 'one'.

. Number the chain to give smallest number to the carbonyl group.   

Common name: 

Common name  is derived by listing the alkyl substituents attached to the carbonyl group in alphabetical order, followed by word ketone.

                            CH_3COCH_3 :::::::: CH_3COC_6H_5:::::::CH_3COCH=CH_2

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Sample Questions
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Question : 1

Which of the following are correct :

(a) Ketones usually have strong odors, hence are used as flavoring or scents.

(b) Ketones can form hydrogen bond with water therefore they are soluble in water.

(c) Organic compounds containing > CO as the functional group are called ketones.

Right Option : D
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Question : 2

_______________________ usually have strong odors, hence are used as flavouring or scents.

Right Option : A
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Question : 3

Butanone is a four carbon compound with functional group :

Right Option : C
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Explanation
 
 


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