Which of the following orders is correct?

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(D) $1$. In an aqueous medium,$Li^{+}$ has the maximum hydrated radius due to its high charge density,which leads to extensive hydration. Thus,the ord

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All of the above are correct

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(D) $1$. In an aqueous medium,$Li^{+}$ has the maximum hydrated radius due to its high charge density,which leads to extensive hydration. Thus,the order $Li^{+}_{(aq)} > Na^{+}_{(aq)} > K^{+}_{(aq)} > Rb^{+}_{(aq)} > Cs^{+}_{(aq)}$ is correct.$2$. For halogens,the bond dissociation energy order is $Cl_2 > Br_2 > F_2 > I_2$. $F_2$ has a lower bond dissociation energy than $Cl_2$ due to significant lone pair-lone pair repulsion between the small fluorine atoms.$3$. For alkaline earth metal sulfates,the solubility decreases down the group because the hydration energy decreases more rapidly than the lattice energy. Thus,$BeSO_4 > MgSO_4 > CaSO_4$ is correct.Therefore,all the given statements are correct.

Metal	Uses
$1$. Sodium	$a$. For preparing springs
$2$. Beryllium-copper	$b$. In treatment of cancer
$3$. Radium	$c$. In preparation of aeroplanes
$4$. Magnesium-aluminium	$d$. In color industries

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Match the following:

Metal Uses

$1$. Sodium $a$. For preparing springs

$2$. Beryllium-copper $b$. In treatment of cancer

$3$. Radium $c$. In preparation of aeroplanes

$4$. Magnesium-aluminium $d$. In color industries

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