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Chemistry
Which of the following compounds decolourises aqueous bromine and does not gives white fumesof HCI on reaction with PCI5 ?
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Q. Which of the following compounds decolourises aqueous bromine and does not gives white fumesof HCI on reaction with $PCI_5$ ?
Alcohols Phenols and Ethers
A
$CH_3CH_2CH_2CH_2OH$
22%
B
$CH_3OCH_2CH=CH_2$
52%
C
$CH_3OCH_2CH_2CH_2O$
4%
D
$CH3CH = CHCH_2CH_2OH.$
22%
Solution:
$CH _{3}- CH = CH - CH _{2}- CH _{2}- OH + PCl _{5} \rightarrow K _{3} C - CH = CH - CH _{2}- CH _{2}- Cl + MCl + POCl _{3} \downarrow Br _{2} \mid H _{2} O$ Colour decolorises due to the presence of double bond.