The incorrect statement among the following i | vedclass

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(A, D) $(I)$ In $VOSO_4$,$V$ is in $+4$ oxidation state. It acts as an oxidizing agent,not a reducing agent.$(II)$ $Cr_2O_3$ is an amphoteric oxide.$(

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Red colour of ruby is due to the presence of $Co^{3+}$

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(A, D) $(I)$ In $VOSO_4$,$V$ is in $+4$ oxidation state. It acts as an oxidizing agent,not a reducing agent.$(II)$ $Cr_2O_3$ is an amphoteric oxide.$(III)$ In $RuO_4$,$Ru$ is in $+8$ oxidation state. It acts as an oxidizing agent.$(IV)$ The red colour of ruby is due to the presence of $Cr^{3+}$ ions in $Al_2O_3$ lattice,not $Co^{3+}$.Therefore,both $(A)$ and $(D)$ are incorrect statements.

The incorrect statement among the following is :-

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