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IIT JEE Advanced 2012 Paper 2

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Question : 24

Total: 60

The reaction of white phosphorous with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type; the oxidation states of phosphorus in phosphine and the other product are, respectively,

redox reaction; −3 and −5.
redox reaction; +3 and +5.
disproportionation reaction; −3 and +1.
disproportionation reaction; −3 and +3.

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