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BITSAT2011Chemistryd and f Block ElementsActual

Which of the following pairs has the same size?

Options

  1. AFe ²⁺, Ni ²⁺
  2. BZr ⁴⁺, Ti ⁴⁺
  3. CZr ⁴⁺, Hf ⁴⁺
  4. DZn ²⁺, Hf ⁴⁺

Correct answer

C. Zr ⁴⁺, Hf ⁴⁺

Step-by-step solution

Due to lanthanide contraction, the size of Zr and Hf (atom and ions) become nearly similar.

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