Statement I:Atomic size of Zr is almost equal to atomic size of HfStatement II: Due to poor shielding of 5f orbitals, the atomic size of Zr and Hf is almost same
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a
Statements I and II are correct
b
Statement I is correct and statement II is incorrect
c
Statement I is incorrect and statement II is correct
d
Statements I and II are incorrect
answer is B.
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Detailed Solution
Due lanthanoid contraction(poor shielding of 4f orbitals) atomic radii of Zr and Hf are nearly equal;
Statement I:Atomic size of Zr is almost equal to atomic size of HfStatement II: Due to poor shielding of 5f orbitals, the atomic size of Zr and Hf is almost same