A) \[Ca{{C}_{2}}+CaC{{N}_{2}}\]
B) \[Ca{{C}_{2}}+C{{a}_{3}}{{P}_{2}}\]
C) \[Ca{{C}_{2}}+CaC{{O}_{3}}\]
D) \[C{{a}_{3}}{{P}_{2}}+CaC{{N}_{2}}\]
Correct Answer: B
Solution :
The spontaneous combustion of phosphine is technically used in Holme's samples. Containers containing calcium carbide and calcium phosphide are pierced and thrown in the sea when the gases evolved bum and serve as a signal.
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