JEE Advanced Chemistry question

Which of the following will displace the halogen from the solution of the halide?

(A)Br2 added to NaICorrect
(B)Br2 added to NaCl
(C)Cl2 added to KCl
(D)Cl2 added to NaF

Answer: (A)

Solution

A halogen can displace a different halogen from its salt only if it is the stronger oxidising agent of the two (oxidising power order F2 > Cl2 > Br2 > I2). Br2 is a stronger oxidant than I2, so it readily displaces iodide: Br2 + 2NaI → 2NaBr + I2, confirming (a). Br2 cannot displace

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Question ID VK-159344