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Q.

Statement I : In the reaction of dil(or)conc. HNO3 with metals, H2 gas is not liberated.Statement II : Tendency to undergo reduction is more for NO3- than H+.

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a

Both (I) & (II) are True

b

(I) is true & (II) is false

c

(I) is false & (II) is True

d

Both (I) & (II) are false

answer is A.

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Detailed Solution

SRP values of  NO3- / N2O ; NO3- / NO  and  NO3- / NO2 are +ve and very high. ∴ NO3-  is a strong oxidant.ENO3-/NOx0>EH+/12H2,Pt0When H+ & NO3- compete to undergo reduction, NO3-  will always get reduced to N2O (or) NO (or) NO2.
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