3 moles of ethanol react with 1 mole of PBr_{3} to form 3 mole of bromoethane and one mole of x . which of the following is x

  • Option 1)

    H_{3}PO_{4}

  • Option 2)

    H_{3}PO_{2}

  • Option 3)

    HPO_{3}

  • Option 4)

    H_{3}PO_{3}

 

Answers (1)

As we learnt in 

Alcohols reaction with phosphorus trihalides -

Form alkyl halides 

- wherein

ROH+PX_{3}\rightarrow RX+H_{3}PO_{3}

X = Cl, Br, I

 

 3C_{2}H_{5}OH\:+\:PBr_{3}\:\rightarrow \:3C_{2}H_{5}Br\:+\:H_{3}PO_{3}


Option 1)

H_{3}PO_{4}

This option is incorrect.

Option 2)

H_{3}PO_{2}

This option is incorrect.

Option 3)

HPO_{3}

This option is incorrect.

Option 4)

H_{3}PO_{3}

This option is correct.

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