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When white phosphorous reacts with NaOH,...

When white phosphorous reacts with `NaOH`, it produces a gaseous mixture by the following parallel reaction.
`P_(4) +3NaOH +3H_(2)O rarr 3NaH_(2)PO_(2)+PH_(3)uarr`
`3P_(4)+8NaOH +8H_(2)O rarr 8NaH_(2)PO_(2)+2P_(2)H_(4)uarr`
The gas mixture comes out and catches fire immediately due the presence of

A

`PH_(3)`

B

`P_(2)H_(4)`

C

`P_(2)H_(6)`

D

`H_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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When white phosphorous reacts with NaOH , it produces a gaseous mixture by the following parallel reaction. P_(4) +3NaOH +3H_(2)O rarr 3NaH_(2)PO_(2)+PH_(3)uarr 3P_(4)+8NaOH +8H_(2)O rarr 8NaH_(2)PO_(2)+2P_(2)H_(4)uarr The correct thermal stability order is

P_(4)+NaOH to PH_(3) uarr+NaH_(2)PO_(2)

P_(4)+NaOH+H_(2)O rarr NaH_(2)PO_(3)+PH_(3) is

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