A student named an alkane as $2 - e t h y l p r o p a n e$ the correct.
IUPAC Name of the alkane is ___________.

2 - M e t h y l b u t a n e

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2, 2 - D i m e t h y l b u t a n e

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2, 3 D i m e t h y l p e n t a n e

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2, 3 - D i m e t h y l b u t a n e

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Solution

The correct option is A $2 - M e t h y l b u t a n e$
Correct IUPAC name will be $2 - M e t h y l b u t a n e$
Since first we have to choose lung chain carbon, then do numbering in such a way that substituent get less number
Here the longest chain of carbon contains 4 carbon atom with a methyl group at a second carbon atom.

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