The weakest base among KOH,NaOH,Ca(OH)_2,and | vedclass

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(D) The basic strength of hydroxides depends on the ionic character of the $M-OH$ bond. $KOH$ and $NaOH$ are hydroxides of alkali metals,which are hig

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$Zn(OH)_2$

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(D) The basic strength of hydroxides depends on the ionic character of the $M-OH$ bond. $KOH$ and $NaOH$ are hydroxides of alkali metals,which are highly ionic and strong bases. $Ca(OH)_2$ is a hydroxide of an alkaline earth metal,which is also a strong base. $Zn(OH)_2$ is an amphoteric hydroxide. The $Zn^{2+}$ ion has a high charge density and small size,leading to significant covalent character in the $Zn-OH$ bond. Therefore,$Zn(OH)_2$ is the weakest base among the given options.

The weakest base among $KOH$,$NaOH$,$Ca(OH)_2$,and $Zn(OH)_2$ is:

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