Which of the following statements is/are correct?

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An anion is larger than a cation if they are isoelectronic.

Out of Na⊕ and Al3+,Na⊕ has the largest size.

The ionic radii of trivalent lanthanides La3+,Ce3+,Pr3+....] decreases with increasing atomic number.

Out of P3,S2−, and Cl-,Cl -ion has the largest size

answer is A.

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Detailed Solution

for isoelectronic anions greater the charge greater will be size P-3>S-2>Cl-1

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