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Q.

White phosphorous reacts with concentrated NaOH solution in the inert atmosphere of CO2 produces two phosphorous compounds, gas (X) and salt (Y).Then find the incorrect statement among the following.

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a

X explodes upon contact with oxidants such as HNO3, Cl2 and Br2 vapours.

b

X is a colourless gas with rotten fish smell.

c

The oxidant state of phosphorous in Y is +1.

d

Salt Y contains replaceable hydrogens.

answer is D.

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Detailed Solution

P4+3NaOH+3H2O→PH3X+3NaH2PO2YX ® colourless gas with rotten fish smell. It explodes upon contact with oxidantsY ®Oxidation state ‘P’ is +1. It is a normal salt and hence does not contain any  replaceable hydrogensNote: H3PO2 mono basic acid
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