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B
2KBr+I2→2kI+Br2
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C
2KBr+Cl2→2kCl+Br2
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D
2H2O+2F2→4HF+O2
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Solution
The correct option is C2KBr+I2→2kI+Br2 2KBr+I2→2KI+Br2
Reaction is not possible because Br− ion is not oxidised in Br2 with I2 due to higher electrode potential of I2 than bromine.
In halogens, fluorine can displace chlorine, bromine and iodine, chlorine can displace bromine and iodine and bromine can displace iodine from their salts.