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I. ZnO + C to Zn + CO uarr II. PbO + C...

I. `ZnO + C to Zn + CO uarr`
II. `PbO + C to Pb + CO uarr`
III. `Cr_(2)O_(3) + 2Al to Al_(2)O_(3) + 2Cr`
IV. `P_(4)O_(10) + 2Cr to 2CrO_(5) + P_(4) uarr`
V. `Al_(2)O_(3) + 2Cr to Cr_(2)O_(3) + 2Al`
Out of the above non-feasible is (are):

A

IV and V

B

II, III and IV

C

I and IV

D

None except V

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The correct Answer is:
A
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