The electron affinity values (inkJmol−1) of three halogens x, y and z are respectively -349, -333 and -325. Then x, y and z are respectively
A
F2,Cl2andBr2
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B
Cl2,F2andBr2
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C
Cl2,Br2andF2
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D
Br2,Cl2andF2
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Solution
The correct option is BCl2,F2andBr2 Generally electron affinity decreases down the group but F2 has a lower electron affinity compared to Cl2 because the size of F2 is very small and hence interelectronic repulsion is high.