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Question

Phosphine is produced by adding water to

A

$$HPO_3$$

B

$$Ca_3P_2$$

C

$$CaC_2$$

D

$$P_4O_{10}$$

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Solution

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Correct option is C. $$Ca_3P_2$$
Phosphine is produced by adding $$Ca_3P_2$$ to water. The reaction is as shown below:

$$Ca_3P_2 +6H_2O \to 3Ca(OH)_2 +2PH_3$$

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