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AP EAMCET201822 Apr 2018Evening ShiftChemistryd and f Block ElementsActual

Identify the correct statements from the following. (i) Eu ²⁺ and Yb ²⁺ are reducing agents. (ii) The electronic configuration of Pr ³⁺ is [ Xe ] 4 f^3 . (iii) Aqueous solution of LaCl ₃ is colourless.

Options

  1. A(i), (ii), (iii)
  2. B(i), (iii)
  3. C(i), (ii)
  4. D(ii), (iii)

Correct answer

B. (i), (iii)

Step-by-step solution

(a) Eu ²⁺ and Yb ²⁺ can lose electrons and form Eu ³⁺ and Yb ³⁺ . So, act as reducing agents. (c) in the aqua solution of LaCl ₃ it forms colourless solution.

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