A) \[Ca{{(OH)}_{2}}\]
B) KOH
C) \[Li(OH)\]
D) \[Sr{{(OH)}_{2}}\]
Correct Answer: C
Solution :
Basic character of hydroxides of s-block elements increase with increasing atomic number. However alkaline earth metal hydroxides are less basic than alkali metal hydroxides. Therefore, \[Li(OH)\] is the weakest base.
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