MCQ
$K^+, Cl^-, Ca^{2+}$ and $S^{2-},$ ions are isoelectronic. The decreasing order of their size is
- ✓$S^{2-} > Cl^-> K^+ > Ca^{2+}$
- B$Ca^{2+} > K^+ > Cl^-> S^{2-}$
- C$K^+ > Cl^-> Ca^{2+} > S^{2-}$
- D$Cl^-> S^{2-} > Ca^{2+} > K^+$
✓
Answer
Correct option: A.
$S^{2-} > Cl^-> K^+ > Ca^{2+}$
a
The decreasing order is : $S ^{2-}\,>\, Cl ^{-}\,>\, K ^{+}\,>\, Ca ^{2+}$. Anions are larger than cations. More the negative charge more is the size.
The decreasing order is : $S ^{2-}\,>\, Cl ^{-}\,>\, K ^{+}\,>\, Ca ^{2+}$. Anions are larger than cations. More the negative charge more is the size.
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