Question

The following are the statements about oxides,
hydroxides of group-2 elements
i) oxides of group-2 elelments are thermally stable
but Beo is amphoteric
ii) Beo and Be(OH)2 are basic in nature
iii) solubility and basic nature of oxides of group-2
elements increase from Be(OH), to
Ba(OH)2
The correct combination is​

Answer 1

Answer:

HI

Explanation:

Answer 2

Among the given statements about oxides and hydroxides of group-2 elements, (i) and (iii) are correct.

• The oxides of group-2 elements are quite stable and have high enthalpies of formation.
• BeO and Be(OH)₂ are amphoteric in nature i.e. they react with both acids and bases.
• On moving down the group, the basic character and solubility character of the hydroxides increases. This is because from BeO to Be(OH)₂, the lattice energy decreases more than hydration energy.
• Hence, both the statements (i) and (iii) are correct.