White phosphorus,when heated with conc. NaOH | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) White phosphorus $(P_4)$ undergoes disproportionation reaction when heated with concentrated $NaOH$ solution to form phosphine $(PH_3)$ and sodium

Vedclass · Accepted Answer

$+1$

Vedclass · Answer

(C) White phosphorus $(P_4)$ undergoes disproportionation reaction when heated with concentrated $NaOH$ solution to form phosphine $(PH_3)$ and sodium hypophosphite $(NaH_2PO_2)$.The chemical equation is: $P_4 + 3NaOH + 3H_2O \rightarrow PH_3 + 3NaH_2PO_2$.In the salt $NaH_2PO_2$ (sodium hypophosphite),let the oxidation state of $P$ be $x$.The sum of oxidation states is: $(+1) + 2(+1) + x + 2(-2) = 0$.$1 + 2 + x - 4 = 0$.$x - 1 = 0$.$x = +1$.

White phosphorus,when heated with conc. $NaOH$ solution in an inert atmosphere of $CO_2$,forms phosphine and a sodium salt of oxoacid of phosphorus,$'X'$. The oxidation state of phosphorus in $'X'$ is

Similar Questions

Nitrogen forms $NCl_3$ whereas phosphorus forms both $PCl_3$ and $PCl_5$. Why?

In case of nitrogen,$NCl_3$ is possible but not $NCl_5$,while in case of phosphorus,$PCl_3$ as well as $PCl_5$ are possible. This is due to:

Which of the following oxides of nitrogen is not a common pollutant in the atmosphere?

Consider the following:
Statement-$I$ : $Al_2O_3$ is amphoteric in nature.
Statement-$II$ : $Tl_2O_3$ is more basic than $Ga_2O_3$.
The correct answer is

Which of the following allotropes of phosphorus is the most stable?

Vedclass Test Series

Exam Paper Generator

Online Exam Module