VITEEE 2019 Paper

Section: Chemistry

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Question : 71 of 125

Marks: +1, -0

Phosphine is generally prepared in the laboratory:

By heating phosphorus in a current of hydrogen
By heating white phosphorus with an aqueous solution of caustic potash
By decomposition of P2H4 at 110°C
By heating red phosphorus with an aqueous solution of caustic soda

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