What may be expected to happen when phosphine gas is mixed with chlorine gas?

  • Option 1)

    The mixture only cools down

  • Option 2)

    PCl_{3}\; \; and\;\; HCl  are formed and the mixture warms up

  • Option 3)

    PCl_{5}\; \; and\;\; HCl are formed and the mixture cools down

  • Option 4)

    PH_{3}\cdot Cl_{2} is formed with warming up

 

Answers (1)

As we learnt in 

Phosphine -

Highly poisonous with rotten fish smell and slightly soluble in water

-

 

 PH_{3}+4HCl_{2}\rightarrow PCl_{5}+3HCl


Option 1)

The mixture only cools down

This option is incorrect.

Option 2)

PCl_{3}\; \; and\;\; HCl  are formed and the mixture warms up

This option is incorrect.

Option 3)

PCl_{5}\; \; and\;\; HCl are formed and the mixture cools down

This option is correct.

Option 4)

PH_{3}\cdot Cl_{2} is formed with warming up

This option is incorrect.

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