The substance used in holmes singnals of the ship is a mixt…

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) JEE (Main) / AIEEE Problems (Previous Year) Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

The substance used in holmes singnals of the ship is a mixture of :

CaC 2 + Ca 3 P 2

Ca 3 (PO 4 ) 2 + Pb 3 O 4

H 3 PO 4 + CaCl 2

NH 3 + HOCl

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The correct answer is:

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.

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