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The compound used in Holme's signal is 

Option: 1

P2O5


Option: 2

P4O10


Option: 3

PH3


Option: 4

H2S


Answers (1)

best_answer

As we have learnt,

In Holme's signal, Calcium Phosphide gets hydrolysed to form Phosphine which spontaneously undergoes combustion.

This spontaneous combustion of phosphine is technically used in Holme's signals.

Therefore, option (3) is correct.

Posted by

Shailly goel

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