I : Ti, V render passive towards conc.HNO3II: Reducing power of Cr+2 > Fe+2

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I and II correct

I and II incorrect

I is correct, II is incorrect

I is incorrect, II is correct

answer is A.

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Detailed Solution

1)Nitric acid (dilute or conc) renders V and Ti passive, because when V and Ti comes into contact with nitric acid, an impervious layer of V and Ti oxide is formed. This layer of V and Ti oxide will prevent the nitric acid from coming into contact with the inner V and Ti metal.2)Cr2+ is stronger reducing agent than Fe2+Reason: d4 → d3 occurs in case of Cr2+ to Cr3+But d6 → d5 occurs in case of Fe2+ to Fe3+In a medium (like water) d3 is more stable as compared to d5

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