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Identify the incorrect statement from the following:
A
The acidic strength of HX (X = F, Cl, Br and I) follows the order: HF > HCl > HBr > HI.
B
Fluorine exhibits –1 oxidation state whereas other halogens exhibit +1, +3, +5 and +7 oxidation states also.
C
The enthalpy of dissociation of $F_2$ is smaller than that of $Cl_2$.
D
Fluorine is stronger oxidising agent than chlorine.
Detailed Solution
The correct order of acidic strength of hydrohalic acids is $HI>HBr>HCl>HF$ (bond dissociation enthalpy decreases down the group, making H–I easiest to ionise), so the statement given in option (a), $HF>HCl>HBr>HI$, is incorrect.