Question

what is home signal in chemistry​

Answer 1

Answer:

Holmes signal - A mixture of calcium carbide and calcium phosphide placed in a container which reacts with water to produce gases (PH3 and C2H2) which burn and thus guide the ships in sea.so PH3 gas that is called PHOSPHINE is used in holmes signal.

Explanation:

Definition of Holmes light. : a signaling device that consisting of a case containing impure calcium phosphide and a float and that when thrown into water generates hydrogen phosphides that take fire spontaneously.