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Chemistry Question on GROUP 2 ELEMENTS

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

A

Be2+Be^{2+}

B

Mg2+Mg^{2+}

C

Ca2+Ca^{2+}

D

Sr2+Sr^{2+}

Answer

Sr2+Sr^{2+}

Explanation

Solution

In aqueous solution, the ionic mobility is inversely proportional to the charge density on the ion. Hence Sr2+Sr^{2+} has highest ionic mobility in water.

So, the correct option is (D): Sr2+Sr^{2+}