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Question

Consider the following reaction:
ROH+PX5RX+B+HX
What is B?

A
HPOX3
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B
H3PO2
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C
H3PO3
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D
POX3
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Solution

The correct option is B POX3
B is POX3.
For example, when ethyl alcohol is refluxed with PCl5, ethyl chloride, HCl and phosphorous oxy chloride is obtained.
CH3CH2OH+PCl5CH3CH2Cl+POCl3+HCl

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