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# Question and Answer

## QuestionChemistryClass 12

Many hundred years ago, a ship was transporting calcium carbide and calcium phosphide (stored in different container). By chance sea-water entered sea and luminous flame appeared a ghost would have come. However, a chemist travelling in it explained it based on reactions. These reactions are
$$\underset{Calcium \, \, Carbide}{CaC_2} + 6H_2O \longrightarrow Ca(OH)_2+ \underset {Acetylene}{C_2H_2} \, \, \, \, \, \, \, \, \, \, \, \, \underset { Calcium \, \, phosphide}{Ca_3P_2} + 6H_2O \longrightarrow 3Ca(OH)_2+\underset {Phosphine}{2PH_3}$$

(A) True
(B) False

## Answer

Answer: A
$$CaC_2$$ and $$Ca_3P_2$$ both were stored in containers but when water reacted with them $$PH_3$$ and $$C_2H_2$$ were formed. Some highly spontaneously flammable gases ($$P_2H_4$$ and $$H_2$$) are also formed and as a result of this, $$C_2H_2$$ gas also burns (which people assumed as a ghost). So the reaction and statements are true.
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