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AP EAMCET202319 May 2023Morning ShiftChemistryd and f Block ElementsActual

Identify the correct statement

Options

  1. AYb ²⁺ is an oxidant
  2. BLu ³⁺ is paramagnetic
  3. CCrO is basic
  4. DBrass is an alloy of Cu , Sn

Correct answer

C. CrO is basic

Step-by-step solution

Yb ²⁺=[ Xe ] 4 f ¹⁴ Thus, it prefers to lose one electron as shielding is strong and it can form Yb ³⁺ so it acts as a reductant. Lu ³⁺=[ Xe ] 4 f ¹⁴ so it is diamagnetic. CrO is basic in its low oxidation state of +2 and prefers to attain a state of +6 . Brass = Cu + Zn and Bronze = Cu + Sn

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