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AP EAMCET202123 Aug 2021Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

Which of the following statements is incorrect?

Options

  1. AA cation is smaller than an anion if they are isoelectronic.
  2. BOut of P ³⁻, S ²⁻ and Cl ⁻, Cl ⁻ ion is larger in size.
  3. CAll transition elements are metals.
  4. DThe ionic radii of lanthanoids in trivalent state decrease with increasing atomic numbers.

Correct answer

B. Out of P ³⁻, S ²⁻ and Cl ⁻, Cl ⁻ ion is larger in size.

Step-by-step solution

We know that, for isoelectronic species, greater the negative charge on ion, larger is the size of ion. P ³⁻ ion is larger in size, than S ²⁻ and Cl ⁻ ions. So, statement (b) is incorrect.

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