Redox Reactions And Electrochemistry Ques 477
Question: When $ P $ reacts with caustic soda, the products are $ PH_3 $ and $ NaH_2PO_2. $ This reaction is an example of [IIT 1980; Kurukshetra CEE 1993; CPMT 1997]
Options:
A) Oxidation
B) Reduction
C) Oxidation and reduction (Redox)
D) Neutralization
Show Answer
Answer:
Correct Answer: C
Solution:
$ \overset{0}{\mathop{P_4}},+3NaOH+3H_2O\to \underset{\begin{smallmatrix} ,Sodium \\ hypophosphite \end{smallmatrix}}{\mathop{3NaH_2PO_2}},+\overset{-3,}{\mathop{PH_3}}, $ . It shows oxidation and reduction (Redox) properties.
