A) \[{{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}\] Bond dissociation enthalpy
B) \[{{H}_{2}}O>{{H}_{2}}S>{{H}_{2}}Se>{{H}_{2}}Te\] Thermal stability
C) \[S{{O}_{2}}>{{P}_{2}}{{O}_{3}}>A{{s}_{2}}{{O}_{3}}>Si{{O}_{2}}\] Acid strength
D) \[F>Cl>O>S\] More negative electron gain enthalpy
Correct Answer: D
Solution :
Elements \[F\,\,\,\,\,\,\,Cl\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,S\] electron gain enthalpy -333 -349 -141 -200 (in \[kJ\,mo{{l}^{-1}}\]) Hence, the correct order is . \[Cl>F>S>0\]
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