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 $



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