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The correct order of mobility of alkali metal ions in aqueous solution isA. `Li^(o+) gt Na^(o+) gt K^(o+) gt rb^(o+)`B. `Rb^(o+) gt Na^(o+)-=K^(o+) gt Li^(o+)`C. `Li^(o+) lt Na^(o+) lt K^(o+) lt Rb^(o+)`D. `Na^(o+)-=K^(o+) gt Rb^(o+) gt Li^(o+)` |
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Answer» Correct Answer - C Down the group `(darr)` with decrease in positive charge density of `M^(o+)` ion tendency to get hydrated decreases and hence the size of hydrated ion decreases. Thus moibility increases. `Li_((aq)) lt Na_((aq))^(o+) lt K_((aq))^(o+) lt Rb_((aq))^(o+)` |
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