Question
Question: The substance used in holmes singnals of the ship is a mixture of :...
The substance used in holmes singnals of the ship is a mixture of :
A
CaC2 + Ca3P2
B
Ca3(PO4)2 + Pb3O4
C
H3PO4 + CaCl2
D
NH3 + HOCl
Answer
CaC2 + Ca3P2
Explanation
Solution
The spontaneous combustion of phosphine is technically used in Holme’s signals. Containers containing calcium carbide and calcium phosphide are pierced and thrown in the sea when the gases evolved burn and serve as a signal.