Q. Which of the following orders of ionic radii is correctly represented ?
A) $H^- > H^+ > H$
B) $Na^+ > F^- > O^{2-}$
C) $F^- > O^{2-} > Na^+$
D) $Al^{3+} > Mg^{2+} > N^{3-}$
Explanation
[Solution] The correct orders are $H^- > H > H^+$, $O^{2-} > F^- > Na^+$ and $N^{3-} > Mg^{2+} > Al^{3+}$; none of the options is correct, and the official key marks this question NA. No option is correct; the official key drops this question (NA).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.