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Which alkane, having a molecular weight ...

Which alkane, having a molecular weight of `86`, will form only two monobromo alkanes?

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Alkane is `C_(n)H_(2n+2)` Molecular weight `=86`
`:. 12n +2n+2= 86implies n=6`
Therefore, alkane is `C_(6)H_(14)`.
The alkane with this formula on bromination giving two products may be written as `CH_(3).overset(H_(3)C)overset(|)(CH).overset(CH_(3))overset(|)(CH).CH_(3)`
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