Redox Reactions · JEE Main previous year questions

2009 1 question

1. Q772009 · 27 Apr 2009 · Shift 1

   Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect?

   1. A.Because of the large size of the Ln (III) ions the bonding in its compounds is predominantly ionic in character.
   2. B.The ionic sizes of Ln (III) decrease in general with increasing atomic number.
   3. C.Ln (III) compounds are generally colourless
   4. D.Ln (III) hydroxides are mainly basic in character.
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   Answer: C