Phosphine is generally prepared in the labora | vedclass

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(B) In the laboratory,phosphine $(PH_3)$ is prepared by heating white phosphorus with a concentrated aqueous solution of caustic potash $(KOH)$ or cau

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Heating white phosphorus with an aqueous solution of caustic potash

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(B) In the laboratory,phosphine $(PH_3)$ is prepared by heating white phosphorus with a concentrated aqueous solution of caustic potash $(KOH)$ or caustic soda $(NaOH)$ in an inert atmosphere of $CO_2$. The chemical reaction is: $P_4 + 3KOH + 3H_2O 	o PH_3 + 3KH_2PO_2$ Therefore,the correct option is $(B)$.

Phosphine is generally prepared in the laboratory by:

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