Identify the incorrect order.

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Question

(A) Let us analyze each option:$1$. Acidic nature of hydrohalic acids increases down the group as bond dissociation energy decreases: $HF < HCl < HBr

Vedclass · Accepted Answer

$HF < HCl < HBr < HI$ ; Acidic nature

Vedclass · Answer

(A) Let us analyze each option:$1$. Acidic nature of hydrohalic acids increases down the group as bond dissociation energy decreases: $HF  HCl > HBr > HI$,which is incorrect.$2$. Hydrated radius depends on charge density. $Be^{2+}$ has higher charge density than $Li^{+}$,so $Be^{2+}_{(aq)}$ has a larger hydrated radius: $Li^{+}_{(aq)} $3$. Lattice energy is inversely proportional to the inter-ionic distance. As the size of the cation increases from $Li^{+}$ to $Rb^{+}$,the lattice energy decreases: $LiF > NaF > KF > RbF$. This is correct.$4$. Electron affinity of $Cl$ is higher than $F$ due to the small size and inter-electronic repulsion in $F$: $Cl > F > Br > I$. This is correct.Therefore,the incorrect order is $A$.

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