Which of the following is wrong regardin...

Which of the following is wrong regarding halogens?

A, Fluorine is the most abundant among halogens

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

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

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

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Which of the following order is wrong?

`NH_3 lt PH_3 lt AsH_3` - acidic character

`Li^+ lt Na^+ lt K^+ lt Cs^+` - ionic radius in gaseous state

`Li lt Be lt B lt C - IE_1`

`Li lt Na lt K lt Rb` - increasing metallic radius

`O gt F gt N gt C - Iind I.P`

`S^(-2) gt Cl^- gt K^+ gt Ca^(+2)` - ionic radius

`N gt C gt P gt Si - E . N`

`F gt Na gt Ne - Ist I.P`

Uricotelic-Birds

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