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Which of the following is wrong regardin...

Which of the following is wrong regarding halogens?

A

A, Fluorine is the most abundant among halogens

B

B. Reactivity of halogens decreases down the group and electronegativity also in same manner

C

C. All halogens have colour with high negative `Delta_(eg)H, Delta_(eg)H` of order `F lt Cl gt Br gt I`

D

D. Bond dissociation enthalpy `F_(2) gt Cl_(2) gt Br_(2) gt I_(2)`

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