Q.

Holme’s signals are based on the following chemicals

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a

Ca3P2+Al4C3

b

Ca3P2+CaC2

c

NH4Cl+NaNO2

d

NH4Cl+Ca(NO3)2

answer is B.

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Detailed Solution

Ca3P2→ H2OPH3CaC2→ H2OC2 H2PH3+C2H2→Fire(signal)
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