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Oxides and Oxoanions

ZnO, TiO2 a...

Question

$Z n O$ , $T i O_{2}$ and $V_{2} O_{5}$ are oxides of d-block elements. If all of three are amphoteric enter 1, else enter 0.

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Solution

Due to variable oxidation states, all are amphoteric.
Amphoteric Oxides : $T i O_{2}, V O_{2}, C r_{2} O_{3}, C r O_{2}, M n_{3} O_{4}, M n_{2} O_{3}, M n O_{2}, C u O, Z n O$
The correct answer is 1.

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Δ G_{f}^{\circ}

(standard free energy of formation) of

Z n O

C O

- 318.2

^{- 1}

- 317.2

^{- 1}

Is reduction of

Z n O

by carbon possible?

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