The incorrect statement among the following is :

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C r_{2} O_{3}

is an amphoteric oxide

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R u O_{4}

is an oxidizing agent

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V O S O_{4}

is a reducing agent

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Red colour of ruby is due to the presence of

C o^{3 +}

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Solution

The correct option is D Red colour of ruby is due to the presence of $C o^{3 +}$
Red colour of the ruby is due to the presence of $C r^{3 +}$ .

$R u O_{4}$ is an oxidizing agent.

$V O S O_{4} \Rightarrow V O^{2 +} \Rightarrow V^{4 +}$ (it can oxidized) So it is a reducing agent.

$C r_{2} O_{3}$ is amphoteric oxide

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