Identify the correct statements from the foll | vedclass

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(B) Statement $A$ is correct: Alkali metals are strong reducing agents because they easily lose their valence electron $(ns^1)$ to achieve a stable no

Vedclass · Accepted Answer

$A, C$ only

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(B) Statement $A$ is correct: Alkali metals are strong reducing agents because they easily lose their valence electron $(ns^1)$ to achieve a stable noble gas configuration $(n-1)p^6$.Statement $B$ is incorrect: $KO_2$ (potassium superoxide) contains the superoxide ion $(O_2^{-})$,which has $17$ electrons. Its molecular orbital configuration is $\sigma 1s^2, \sigma * 1s^2, \sigma 2s^2, \sigma * 2s^2, \sigma 2p_z^2, \pi 2p_x^2 = \pi 2p_y^2, \pi * 2p_x^2 = \pi * 2p_y^1$. Due to the presence of one unpaired electron in the $\pi * 2p_y$ orbital,$KO_2$ is paramagnetic,not diamagnetic.Statement $C$ is correct: Hydration enthalpy is inversely proportional to the ionic size. Since $Li^{+}$ has the smallest ionic size among alkali metals,it has the highest hydration enthalpy.Therefore,statements $A$ and $C$ are correct.

Identify the correct statements from the following.
$A$: Alkali metals are strong reducing agents.
$B$: $KO_2$ is a diamagnetic oxide.
$C$: Hydration enthalpy of $Li^{+}$ is the highest among alkali metal ions.

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Identify the correct statements from the following.$A$: Alkali metals are strong reducing agents.$B$: $KO_2$ is a diamagnetic oxide.$C$: Hydration enthalpy of $Li^{+}$ is the highest among alkali metal ions.