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AIIMS 201827 May
Exam
AIIMS
Year
2018
Date
27 May
Subject
Chemistry
Chapter
Structure of Atom

AIIMS 2018 · 27 May · Chemistry · Structure of Atom

In the P^ 3- , S^ 2- and Cl^ - ions, the increasing order of size is

In the P3−,S2−\mathrm{P}^{3-}, \mathrm{S}^{2-} and Cl−\mathrm{Cl}^{-}ions, the increasing order of size is

Options

  1. AS2−<Cl−<P3−\mathrm{S}^{2-} < \mathrm{Cl}^{-} < \mathrm{P}^{3-}
  2. BCl−<S2−<P3−\mathrm{Cl}^{-} < \mathrm{S}^{2-} < \mathrm{P}^{3-}
  3. CS2−<P3−<Cl−\mathrm{S}^{2-} < \mathrm{P}^{3-} < \mathrm{Cl}^{-}
  4. DP3−<S2−<Cl−\mathrm{P}^{3-} < \mathrm{S}^{2-} < \mathrm{Cl}^{-}

Correct answer

B. Cl−<S2−<P3−\mathrm{Cl}^{-} < \mathrm{S}^{2-} < \mathrm{P}^{3-}

Step-by-step solution

In isoelectronic species, the size of ions increases as negative charge increases. Therefore, Cl−<S2−<P3−\mathrm{Cl}^{-} < \mathrm{S}^{2-} < \mathrm{P}^{3-}.
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