Periodic Classification and Periodic Properties - Result Question 30

####27. Ionic radii of

(a) Ti4+<Mn7+

(b) 35Cl<37Cl

(c) K+>Cl

(d) P3+>P5+

(1999, 3M)

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Answer:

Correct Answer: 27. (c)

Solution:

  1. (a) Ti4+>Mn7+ is the correct order of size due to lower positive charge on Ti4+.

(b) 37Cl=37Cl: Isotopes with same charge have same size because isotopes differ in compositions of nuclei which do not affect the atomic/ionic radius.

(c) K+<Clis the correct order. Among isoelectronic species, anion has greater size than cation.

(d) P3+>P5+ is the correct order. For the same elements, lower the positive charge, larger the ions.



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