Which of the following gives the layer test?

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(D) The layer test is used to identify halide ions like $I^{-}$ and $Br^{-}$.When an aqueous solution containing $I^{-}$ or $Br^{-}$ is treated with c

Vedclass · Accepted Answer

Both $(A)$ and $(B)$

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(D) The layer test is used to identify halide ions like $I^{-}$ and $Br^{-}$.When an aqueous solution containing $I^{-}$ or $Br^{-}$ is treated with chlorine water in the presence of an organic solvent like $CHCl_3$ or $CCl_4$,the halogen is liberated.$2I^{-} + Cl_2 \rightarrow I_2 + 2Cl^{-}$$2Br^{-} + Cl_2 \rightarrow Br_2 + 2Cl^{-}$The liberated $I_2$ imparts a violet color to the organic layer,while $Br_2$ imparts an orange-red color.Therefore,both $I^{-}$ and $Br^{-}$ give the layer test.

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