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Write the equation for the preparation o...

Write the equation for the preparation of phosphine.

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`Ca_3P_2 + 6HCl rarr 3CaCl_2 + 2PH_3`
or, 2lP + 3H_2SO_4rarr Al_2(SO_4)_3 + 2PH_3`
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  3. Write the equation for the preparation of phosphine.

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  11. Why ammonia gas is not collected by the displacement of water?

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  17. What happens when: H2S gas is passed through CuSO4 solution.

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