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Q.

statement I : Holme's signal contain Ca3P2+CaC2statement II : Ca3P2&CaC2 hydrolyse in seawater to form combustible PH3 & C2H2

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a

Both (I) & (II) are True

b

(I) is true & (II) is false

c

(I) is false & (II) is True

d

Both (I) & (II) are false

answer is A.

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Detailed Solution

sailors cary vessels containing Ca3P2&CaC2.During any emergency these vessels are pierced and thrown into sea water.Ca3P2  hydrolysed to PH3 and CaC2 hydrolyses to C2H2Both PH3 and C2H2 are highly combustible gases. They burn and catch fireand serve as a signal .  This is the principle involved in Holme's signal
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