HSC Science (Computer Science) 12th Board ExamMaharashtra State Board
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How is Phosphine Prepared Using the Following Reagent? Caustic Soda - HSC Science (Computer Science) 12th Board Exam - Chemistry

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Question

How is phosphine prepared using the following reagent?

Caustic soda

Solution

Preparation of Phosphine using Caustic soda (NaOH)
White phosphorus is heated with concentrated NaOH solution in an inert atmosphere of
CO2. It is the laboratory method.

`P_4  +       3NaOH+3H_2O     ->  PH_3  +     3NaH_2PO_2`

White        Sodium hydroxide   Phosphine     Sodium
phosphorus                                                      hypophosphite

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APPEARS IN

 2016-2017 (March) (with solutions)
Question 3.1 | 3.00 marks
Solution How is Phosphine Prepared Using the Following Reagent? Caustic Soda Concept: P - Block Group 15 Elements - Phosphine.
S
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