S Block Elements Question 83
Question: The mobility of metal ions in aqueous medium $ (L{{i}^{+}},N{{a}^{+}},{{K}^{+}},R{{b}^{+}}) $ in the electric field, follows the order
Options:
A) $ L{{i}^{+}}>N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}} $
B) $ R{{b}^{+}}>N{{a}^{+}}={{K}^{+}}>L{{i}^{+}} $
C) $ L{{i}^{+}}<N{{a}^{+}}<{{K}^{+}}<R{{b}^{+}} $
D) $ N{{a}^{+}}={{K}^{+}}>R{{b}^{+}}>L{{i}^{+}} $
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Answer:
Correct Answer: C
Solution:
[c] Down the group with decrease in positive charge tendency to get hydrated decreases and hence the size of hydrated ion decreases. Thus mobility increases.
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