Question

# Which will liberate bromine from a solution of potassium bromide?

A
I2
B
Cl2
C
SO2
D
HI

Solution

## The correct option is D $$\displaystyle { Cl }_{ 2 }$$Chlorine is more reactive than bromine and it displaces bromine.If chlorine is added to a solution of potassium bromide, the bromine is replaced by the chlorine forming potassium chloride. Bromine is formed at the same time and can be detected by its colour.$$2KBr+{ Cl }_{ 2 }\longrightarrow 2KCl+{ Br }_{ 2 }$$ChemistryNCERTStandard XII

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