3 moles of ethanol reacts with one mole of phosphorous tribromide to form 3 moles of bromoethane and one mole of X. Which of the following is X?

3 moles of ethanol reacts with one mole of phosphorous tribromide to f

1.	3 moles of ethanol reacts with one mole of phosphorous tribromide to form 3 moles of bromoethane and one mole of X. Which of the following is X?
Answer» `H_(3)PO_(4)` `H_(3)PO_(2)` `HPO_(3)` `H_(3)PO_(3)` Solution :`3CH_(3)CH_(2)OH+PBr_(3) rarr 3CH_(3)CH_(2)Br+H_(3)PO_(3)(X)`