P-Block Elements Ques 335
Question: Sodium hydroxide solution reacts with phosphorus to give phosphine. To bring about this reaction, we need
[KCET 1989]
Options:
A) White phosphorus and dil. $ NaOH $
B) White phosphorus and conc. $ NaOH $
C) Red phosphorus and dil. $ NaOH $
D) Red phosphorus and conc. $ NaOH $
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Answer:
Correct Answer: B
Solution:
$ P_4+3NaOH+3H_2O\to PH_3+NaH_2PO_4 $
