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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