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Chemical Bonding and Molecular Structure question

2023 · Q100
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Chemical Bonding and Molecular Structure question

2023 · Q100

NEETChemistryChemical Bonding and Molecular StructureMCQ+4 / −1

Which one of the following represents all isoelectronic species ?

  1. A
    Na+,Cl−,O−,NO+\mathrm{Na}^{+}, \mathrm{Cl}^{-}, \mathrm{O}^{-}, \mathrm{NO}^{+}Na+,Cl−,O−,NO+
  2. B
    N2O,N2O4,NO+,NO\mathrm{N}_2 \mathrm{O}, \mathrm{N}_2 \mathrm{O}_4, \mathrm{NO}^{+}, \mathrm{NO}N2​O,N2​O4​,NO+,NO
  3. C
    Na+,Mg2+,O−,F−\mathrm{Na}^{+}, \mathrm{Mg}^{2+}, \mathrm{O}^{-}, \mathrm{F}^{-}Na+,Mg2+,O−,F−
  4. D
    Ca2+,Ar,K+,Cl−\mathrm{Ca}^{2+}, \mathrm{Ar}, \mathrm{K}^{+}, \mathrm{Cl}^{-}Ca2+,Ar,K+,Cl−
View written solutionFree

Correct answer: D

Total numbers electrons are same

$$\mathrm{Ca}^{+2}, \mathrm{Ar}, \mathrm{K}^{+}, \mathrm{Cl}^{-} \rightarrow 20$$ electrons

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