Question

Statement-1: The ionic mobility of $N{a}_{\left(aq\right)}^{+}$ is lower than that of $K_{\left(aq\right)}^{+}$
Statement-2 :$r_{N{a}^{+}\left(aq\right)}>r_{k^{+}\left(aq\right)}$

• A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1
• B. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1
• C. Statement-1 is true, statement-2 is false
• D. Statement-1 is false, statement-2 is true

Answer 1

The correct option is A Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1

If hydrated size is more, then ionic mobility is less:
$\therefore N{a}_{aq}^{+}<K_{aq}^{+}$ (order of ionic mobility)
and $r_{N{a}^{+}(aq.)}>r_{K^{+}(aq.)}$ is true a statement
Both statement I and statement II are correct II is correct explanation for I
Hence option A is correct.