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Question

What is the IUPAC name of Methyl n-propyl ketone​?

A
Pentan-2-one
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B
Butan-2-one
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C
Pentan-3-one
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D
2-Methylpentan-2-one
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Solution

The correct option is A Pentan-2-one
Methyl n-propyl ketone​ is the common name whose structure is
CH3COCH2CH2CH3.
The numbering to the parent chain can be done as shown below:
The functional group is ketone so suffix used for this is 'one'
parent chain is of five carbon so word root is Pent. Hence IUPAC name of Methyl n-propyl ketone​ is Pentan-2-one.

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