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Question

Which of the following is arranged according to increasing basic strength?

A
CaO<MgO<SrO<BaO<BeO
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B
BaO<SrO<CaO<MgO<BeO
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C
Beo<MgO<CaO<BaO<SrO
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D
BeO<MgO<CaO<SrO<BaO
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Solution

The correct option is D BeO<MgO<CaO<SrO<BaO
On going down the group in alkaline earth metals, as the atomic size increases, the reactivity increases.
Hence on going down the group, the basic strength of oxides also increases:
BeO < MgO< CaO < SrO < BaO

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