In the reaction
$R O H + P B r_{3} \to R B r$
The number of moles of alcohol that may be converted into alkyl bromide by one mole of $P B r_{3}$ is:

1

mole

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2

mole

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3

mole

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none of the above

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Solution

The correct option is C $3$ mole
From the balanced chemical equation, $1$ mole of $R O H$ reacts with $1$ mole of $P B r_{3}$ to form $1$ mole of $R B r$
Example:
$3 C H_{3} C H_{2} O H + P B r_{3} P + B r_{2} - --- \to 3 C H_{3} C H_{2} B r + H_{3} P O_{3}$

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Q. An alkyl halide may be converted into alcohol by ............... reaction

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In the reactionROH+PBr3→RBrThe number of moles of alcohol that may be converted into alkyl bromide by one mole of PBr3 is:

The correct option is C 3 moleFrom the balanced chemical equation, 1 mole of ROH reacts with 1 mole of PBr3 to form 1 mole of RBrExample:3CH3CH2OH+PBr3P+Br2−−−−→3CH3CH2Br+H3PO3

In the reaction
$R O H + P B r_{3} \to R B r$
The number of moles of alcohol that may be converted into alkyl bromide by one mole of $P B r_{3}$ is:

The correct option is C $3$ mole
From the balanced chemical equation, $1$ mole of $R O H$ reacts with $1$ mole of $P B r_{3}$ to form $1$ mole of $R B r$
Example:
$3 C H_{3} C H_{2} O H + P B r_{3} P + B r_{2} - --- \to 3 C H_{3} C H_{2} B r + H_{3} P O_{3}$