1.

Phosphine is generally prepared in the laboratory [CPMT 1983, 2003]

A. By heating phosphorus in a current of hydrogen
B. By heating white phosphorus with aqueous solution of caustic potash
C. By decomposition of \[{{P}_{2}}{{H}_{4}}\] at \[{{110}^{o}}C\]
D. By heating red phosphorus with an aqueous solution of caustic soda
Answer» C. By decomposition of \[{{P}_{2}}{{H}_{4}}\] at \[{{110}^{o}}C\]


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