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The correct statement(s) among the following is/are: This question has multiple correct options

1. beryllium oxide is amphoteric in nature.
2. solubility of sulphates of II A group elements decreases down the group.
3. reducing power of hydride of alkali metal decreases down the group.
4. beryllium has diagonal relationship with aluminum.

Correct answer: beryllium oxide is amphoteric in nature.

Solution

Beryllium oxide is amphoteric because Be2+ is very small and highly polarizing, so BeO reacts with both acids and bases. The other statements are not correct as written: Group 2 sulfate solubility decreases down the group, alkali metal hydrides do not show decreasing reducing power down the group in that way, and beryllium’s diagonal relationship is with aluminum.

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