A salt gives violet vapours when treated with | vedclass

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(B) When a salt containing iodide ions $(I^{-})$ is treated with concentrated $H_2SO_4$,it produces hydrogen iodide $(HI)$.$HI$ is a strong reducing a

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$I^{-}$

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(B) When a salt containing iodide ions $(I^{-})$ is treated with concentrated $H_2SO_4$,it produces hydrogen iodide $(HI)$.$HI$ is a strong reducing agent and is further oxidized by concentrated $H_2SO_4$ to produce iodine $(I_2)$ vapors,which are violet in color.The reaction is: $2I^{-} + 2H_2SO_4 \rightarrow I_2 + SO_2 + 2H_2O + SO_4^{2-}$.Thus,the presence of violet vapors indicates the presence of $I^{-}$ ions.

$A$ salt gives violet vapours when treated with concentrated $H_2SO_4$,it contains

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