Q.

Which one of the following salts will evolve halogen on treatment with conc. H2SO4?

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a

NaCl

b

CaCl2

c

NaBr

d

KI

answer is C.

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Detailed Solution

2NaBr conc. +H2SO4 ⟶2NaHSO4+Br2 2KI+H2SO4⟶2KHSO4+I2↑
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