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NEETChemistryd and f Block Elements

Which lanthanoid ions do not exhibit any color?

Options

  1. ALa3+ and Lu3+
  2. BSm and Tm
  3. CEu and Yb
  4. DLu3+ and Yb2+

Correct answer

A. La3+ and Lu3+

Step-by-step solution

Neither La3+ nor Lu3+ ion shows any colour.

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