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Standard XII
Chemistry
Question

PH3 can be obtained by:
  1. heating hypophosphorus acid.
  2. reacting white phosphorus with hot conc,NaOH.
  3. heating orthophosphorus acid.
  4. hydrolysis of calcium phosphide.

A
heating orthophosphorus acid.
B
reacting white phosphorus with hot conc,NaOH.
C
hydrolysis of calcium phosphide.
D
heating hypophosphorus acid.
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Solution
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Phosphine is produced industrially by reaction of white phosphorous with sodium/potassium hydroxide producing sodium or potassium phosphite as a byproduct.

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