sblock Elements 2 Question 23
25. Arrange the following in increasing order of basic strength :
$\mathrm{MgO}, \mathrm{SrO}, \mathrm{K} _{2} \mathrm{O}, \mathrm{NiO}, \mathrm{Cs} _{2} \mathrm{O}$
(1991, 1M)
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Solution:
- Basic strength (i) decreases from left to right in period and (ii) increases from top to bottom in group. Therefore,
$\mathrm{NiO}<\mathrm{MgO}<\mathrm{SrO}<\mathrm{K} _{2} \mathrm{O}<\mathrm{Cs} _{2} \mathrm{O} \quad$ Basic strength
