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Question
The most basic hydroxide among those of alkali metals is :
The most basic hydroxide among those of alkali metals is :
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Solution
The correct option is C CsOH
On moving down the group of alkali earth metals, the basic character of hydroxides increases from LiOH to CsOH. As the size of the metal cation increases, the internuclear distance betwen metal cation and the oxygen of the hydroxide group increases. This increases the ease of ionization of the hydroxide ion. Hence, the basicity increases.
On moving down the group of alkali earth metals, the basic character of hydroxides increases from LiOH to CsOH. As the size of the metal cation increases, the internuclear distance betwen metal cation and the oxygen of the hydroxide group increases. This increases the ease of ionization of the hydroxide ion. Hence, the basicity increases.
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