####16. The reaction of white phosphorus with aqueous gives phosphine alongwith another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product respectively are
(2012)
(a) redox reaction, -3 and -5
(b) redox reaction, 3 and +5
(c) disproportionation reaction, -3 and +5
(d) disproportionation reaction, -3 and +3
Show Answer
Solution:
- The reaction of white phosphorus with aqueous alkali is
In the above reaction, phosphorus is simultaneously oxidised as well as reduced Therefore, this is an example of disproportionation reaction. Oxidation number of phosphorus in is -3 and in is +1 . However, +1 oxidation number is not given in any option, one might think that has gone to further decomposition on heating.
