Phosphine is formed on boiling phosphorus with KOH solution. The chemical formula of phosphine is given as PH3. This is the laboratory preparation of phosphine by boiling the white phosphorus in the inert environment of carbon-dioxide. The reaction involved is- 4 2 3 2 2 3 3 3 P NaOH H O PH NaH PO -> Thus, the correct option is-(d)
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