OH PBr3 a more Et₂0 Nal NaBH4 EtOH CH₂SO₂CI pyridine Mg THF HO. Et₂O 10 OH H₂SO4 80 °C

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Q: b) НО. Br NaOH + NaBr + H2O

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.