The incorrect statement is:

In general, interhalogen compounds are more reactive than halogens (except fluorine). This is because $X - {X}^{'}$ bond in interhalogens is weaker than $X - X$ bond in halogens except $F - F$ bond. All these undergo hydrolysis giving halide ion derived from the smaller halogen and a hypohalite (when ${XX}^{'}$), halite (when ${XX}_{3}^{'}$), halate (when ${XX}_{5}^{'}$) and perhalate (when${{XX}_{7}}^{'})$ anion derived from the larger halogen.

${XX}^{'} + {H}_{2}O \to {HX}^{'} + HOX$