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Question

Which of the following orders is wrong?

A
ZnO is amphoteric oxide
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B
Li<Be<B<C IE1
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C
Al2O3<MgO<Na2O<K2O Basic
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D
Li+<Na+<K+<Cs+ Ionic radius
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Solution

The correct option is B Li<Be<B<C IE1
(a) ZnO is amphoteric oxide, it reacts with both HCl and NaOH.
(b) Along the period, ionization increases but due to fully filled orbital in Be , order of first ionization energy is Li<B<Be<C
(c) order of basic character of given oxides is Al2O3<MgO<Na2O<K2O
(d) Down the group ionic size increases, hence the order becomes Li+<Na+<K+<Cs+.

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