s-Block ElementsHard

Question

Which of the following is the strongest base ?

Options

A.Ca(OH)2
B.Sr(OH)2
C.Ba(OH)2
D.Mg(OH)2

Solution

Basic nature of hydroxides increases down the group. The strength of a base depends on ionisation of the hydroxide which depends on polarity of bond and internuclear distance between the oxygen of the hydroxide and metal atom.
Ba is having maximum size 

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