1.

\[100\ mL\] of \[P{{H}_{3}}\] on decomposition produced phosphorus and hydrogen. The change in volume is                [MNR 1986]

A. \[50\ mL\] increase
B. \[500\ mL\] decrease
C. \[900\ mL\] decrease
D. Nil.
Answer» B. \[500\ mL\] decrease


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