The correct answer is b. CH3CH2+, CH3CH2CH2+ and C4H10+. In a mass spectrum, the peaks correspond to ions, not neutral molecules or atoms. The ions are formed by the loss of one or more electrons from the atoms or molecules, hence the positive charge. The three peaks in the mass spectrum of butane correspond to the molecular ion C4H10+ (butane itself after losing an electron) and two fragment ions CH3CH2+ and CH3CH2CH2+ (formed by breaking the C-C bonds in butane).

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The correct answer is b. CH3CH2+, CH3CH2CH2+ and C4H10+. In a mass spectrum, the peaks correspond to ions, not neutral molecules or atoms. The ions are formed by the loss of one or more electrons from the atoms or molecules, hence the positive charge. The three peaks in the mass spectrum of butane correspond to the molecular ion C4H10+ (butane itself after losing an electron) and two fragment ions CH3CH2+ and CH3CH2CH2+ (formed by breaking the C-C bonds in butane).

simplified mass spectrum of butane is shown below.The mass spectrum for butane shows three peaks. The three peaks correspond toa.CH3CH2, CH3CH2CH2 and C4H10b.CH3CH2+, CH3CH2CH2+ and C4H10+c.C2H5, C3H7 and C4H10d.C2H5-, C3H7- and C4H10-

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