Redox Reactions And Electrochemistry Ques 698

Question: In the following reaction $ 4P+3KOH+3H_2O\xrightarrow{{}}3KH_2PO_2+PH_3 $

Options:

A) phosphorus is both oxidised and reduced.

B) only phosphorus is reduced.

C) phosphorus is not oxidized

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

[a] $ 4P+3KOH+3H_2O\to 3KH_2PO_2+PH_3 $ O.N of $ P=0 $ , In $ KH_2PO_2 $ it is + 1, In $ PH_3 $ it is $ -3 $ . Hence P is oxidised and reduced.



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