In the following chemical reactions: 2KI+A2→KCl+B 2KClO3+B2→KIO3+Cl2 A and B respectively, are :
A
Cl2,I2
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B
Cl2,Cl2
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C
I2,I2
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D
I2,Cl2
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Solution
The correct option is ACl2,I2 Cl2 is below I2 in electrochemical series and thus replaces I2 from its solution. 2KI+Cl2→2KCl+I2 I− possesses more tendencey to show +ve oxidation state. The tendency to become electropositive increases down the group. 2KClO3+I2→2KIO3+Cl2 Therefore, A and B are Cl2 and I2 respectively.