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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 BPOX3 B is POX3. For example, when ethyl alcohol is refluxed with PCl5, ethyl chloride, HCl and phosphorous oxy chloride is obtained. CH3−CH2−OH+PCl5→CH3−CH2−Cl+POCl3+HCl