Holme's signal uses chemical compound?

calcium carbide

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calcium phosphide

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calcium carbide and calcium phosphide

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calcium carbide and aluminium carbide.

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Solution

The correct option is D calcium carbide and calcium phosphide

The spontaneous combustion process of phosphine( $P H_{3}$ ) is principle used in Holme's signals. Containers containing calciumcarbide and calcium phosphide are pierced and thrown in the sea when the gases evolved burn and serve as a signal . It is also used in smoke screens.
Hence option C is correct

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Similar questions

C a C_{2} C a l c i u m C a r b i d e + 6 H_{2} O ⟶ C a (O H)_{2} + C_{2} H_{2} A c e t y l e n e C a_{3} P_{2} C a l c i u m p h o s p h i d e + 6 H_{2} O ⟶ 3 C a (O H)_{2} + 2 P H_{3} P h o s p h i n e

C H_{4}

B hot Fe tube - ------ \to 873 K C

A + C l_{2} (limiting) \to D

C + D Anhyd. A l C l_{3} - ------- \to E

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