Q: Which one among the following is the correct arrangement in increasing order of ionic radii of O²⁻, F⁻, Na⁺, Mg²⁺?
(a)Mg²⁺ < Na⁺ < F⁻ < O²⁻
(b)O²⁻ < F⁻ < Na⁺ < Mg²⁺
(c)Mg²⁺ < Na⁺ < O²⁻ < F⁻
(d)O²⁻ < F⁻ < Mg²⁺ < Na⁺
Correct Answer: (a)
The correct answer is (c): Mg²⁺ < Na⁺ < O²⁻ < F⁻. Subject: Logical Reasoning & Mental Ability | Sub-topic: Reasoning Note: This answer was determined through AI-based research. Verify against the official answer key when available.