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61. Beryllium oxide has a high melting point. Explain.

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62.

Which one is more basic Sr(OH)₂or Ba(OH)₂?

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63. Why does beryllium form BeCl₂although it has no unpaired electrons?

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64.

Which one of the alkaline earth metal carbonates is thermally the most stable?

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65.

What is diagonal relationship due to?

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66.

Name the relationship which depicts the resemblance between Li and Mg.

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67.

Which member of the alkaline earth metals family has maximum reduction potential?

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68.

Arrange the following in order of increasing basic character:
BeO, MgO, BaO, CaO.

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Due to the greater ionic radius and less ionisation energy of potassium as compared to barium, results in KOH being a stronger base than Ba(OH)₂.

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70.

Give chemical equation for the preparation of beryllium hydride.

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