JEE Main 2022 · 25 Jun · Shift 1 · Chemistry Q66

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ChemistrySingle correct+4 / -1Question 66 of 90

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution ?

\mathrm{Be^{2+}}

\mathrm{Mg^{2+}}

\mathrm{Ca^{2+}}

\mathrm{Sr^{2+}}

Answer and worked solution

Official answer: D

Hydration. The smaller the ion, the larger its hydration shell and the slower it moves. $\mathrm{Sr^{2+}}$ , the largest, is least hydrated and most mobile.

(D)

Topics:Alkaline earth metals Conductance and Kohlrausch's law

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JEE Main 2022 · 25 Jun · Shift 1, Chemistry question 66