BHU PMT BHU PMT (Mains) Solved Paper-2006

  • question_answer
    3 moles of ethanol react with one mole of phosphorus tribromide to form 3 moles of bromoethane and one mole of X. What is the X?

    A)  \[{{H}_{3}}P{{O}_{2}}\]                                

    B)  \[{{H}_{3}}P{{O}_{4}}\]

    C)  \[HP{{O}_{3}}\]                               

    D)  \[{{H}_{3}}P{{O}_{3}}\]

    Correct Answer: D

    Solution :

                     \[\underset{ethanol}{\mathop{3C{{H}_{3}}C{{H}_{2}}}}\,OH+PB{{r}_{3}}\xrightarrow{{}}\] \[\underset{bromo\text{ }ethane}{\mathop{3C{{H}_{3}}C{{H}_{2}}Br}}\,+\underset{(X)}{\mathop{{{H}_{3}}P{{O}_{3}}}}\,\]


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