Question

Which of the following is the weakest base?

• A. $Ca(OH)_{2}$
• B. $KOH$
• C. $Li(OH)$
• D. $Sr(OH)_{2}$

Answer 1

Answer: (C)

$Li(OH)$

Answer 2

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.