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JEE Main 20205 SeptemberEvening Shift
Exam
JEE Main
Year
2020
Date
5 September
Shift
Evening Shift
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

JEE Main 2020 · 5 September · Evening Shift · Chemistry · Classification of Elements and Periodicity in Properties

The correct order of the ionic radii of O ^ 2 - , N ^ 3 - , F ^ - ,...

The correct order of the ionic radii of O2−,N3−,F−,Mg2+,Na+{O}^{2 -}, {N}^{3 -}, {F}^{-}, {Mg}^{2 +}, {Na}^{+} and Al3+{Al}^{3 +} is :

Options

  1. AN3−<O2−<F−<Na+<Mg2∗<AI3+{N}^{3 -} < {O}^{2 -} < {F}^{-} < {Na}^{+} < {Mg}^{2 *} < {AI}^{3 +}
  2. BAI3+<Na+<Mg2+<O2−<F−<N3−{AI}^{3 +} < {Na}^{+} < {Mg}^{2 +} < {O}^{2 -} < {F}^{-} < {N}^{3 -}
  3. CAl3+<Mg2+<Na+<F−<O2−<N3−{Al}^{3 +} < {Mg}^{2 +} < {Na}^{+} < {F}^{-} < {O}^{2 -} < {N}^{3 -}
  4. DN3−<F−<O2−<Mg2+<Na+<AI3+{N}^{3 -} < {F}^{-} < {O}^{2 -} < {Mg}^{2 +} < {Na}^{+} < {AI}^{3 +}

Correct answer

C. Al3+<Mg2+<Na+<F−<O2−<N3−{Al}^{3 +} < {Mg}^{2 +} < {Na}^{+} < {F}^{-} < {O}^{2 -} < {N}^{3 -}

Step-by-step solution

Al3+<Mg2+<Na+<F−<O2−<N3−{Al}^{3 +} < {Mg}^{2 +} < {Na}^{+} < {F}^{-} < {O}^{2 -} < {N}^{3 -}

All are isoelectronic species so more is the zz of less will be the ionic size.

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