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Grade: 12
        What is holme `s signal?How it can be  use as a signal and tell the reaction involve in this process?
one year ago

Answers : (2)

Umakant biswal
5349 Points
							
Phosphine gets ignited spontaneously as it comes in contact with air and also ignites acetylene. Thus a bright red flame is produced which is accompanied by huge smoke due to the burning of phosphine. This serves as a signal to the approaching ships. 
HOPE IT CLEARS NOW 
ALL THE BEST 

 
one year ago
dolly bhatia
200 Points
							
Containers which have a perforated bottom and a hole at the top are filled with calcium phosphide and calcium carbide. These are thrown into the sea. Water enters the container through the bottom and reacts with calcium carbide and calcium phosphide to give acetylene and phosphine. Phosphine gets ignited spontaneously as it comes in contact with air and also ignites acetylene. Hence, a bright red flame is produced which is accompanied by huge smoke due to burning of phosphine. This serves as a signal to approaching ships.
Reaction:
Ca3P2 + 6H2O --à 2PH3 + 3Ca(OH)2
 Calcium phosphate + water -à Phosphine +calcium hydroxide.
 
one year ago
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