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Question

Draw labelled diagram of Laboratory method of phosphine and give chemical equation?

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Solution

It is prepared in the laboratory by disproportionation of phosphorous acid:

4 H3PO3→ PH3+ 3 H3PO4.

Phosphine evolution occurs around 200 °C. Alternative methods involve the hydrolysis of aluminium phosphide, calcium phosphide, and tris(trimethylsilyl)phosphine


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