The reaction of white phosphorus 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 respectively are

Question

The reaction of white phosphorus 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 respectively are (A) redox reaction, - 3 and - 5 (B) redox reaction, + 3 and + 5 (C) disproportionation reaction, - 3 and + 5 (D) disproportionation reaction, - 3 and + 3

Tardigrade Admin · Accepted Answer

The reaction of white phosphorus with aqueous alkali is

P_{4} + 3 N a O H + 3 H_{2} O ⟶ P H_{3} + N a H_{2} P O_{2}

In the above reaction, phosphorus is simultaneously

o x i d i se d [P_{4} (0) ⟶ N a H_{2}_{P}^{+ 1} O_{2}]

as well as reduced

[P_{4} (0) ⟶_{P}^{- 3} H_{3}]

. Therefore, this is an example of disproportionation reaction. Oxidation number of phosphorus in

P H_{3} i s - 3 an d in N a H_{2} P O_{2}

is + L However, + 1 oxidation number is not given in any option, one might think that

N a H_{2} P O_{2}

has gone to further decomposition on heating.

2 N a H_{2} P O_{2} Δ N a_{2} H_{P}^{+ 5} O_{4} + P H_{3}

Q. The reaction of white phosphorus with aqueous $N a O H$ gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product respectively are

redox reaction, $- 3$ and $- 5$

redox reaction, $+ 3$ and $+ 5$

disproportionation reaction, $- 3$ and $+ 5$

disproportionation reaction, $- 3$ and $+ 3$

Q. The reaction of white phosphorus 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 respectively are

redox reaction, −3 and −5

redox reaction, +3 and +5

disproportionation reaction, −3 and +5

disproportionation reaction, −3 and +3

Q. The reaction of white phosphorus with aqueous $N a O H$ gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product respectively are

redox reaction, $- 3$ and $- 5$

redox reaction, $+ 3$ and $+ 5$

disproportionation reaction, $- 3$ and $+ 5$

disproportionation reaction, $- 3$ and $+ 3$