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The s-Block Elements

Short Answer Type

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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Multiple Choice Questions

64.
Which one of the alkaline earth metal carbonates is thermally the most stable?

MgCO₃
CaCO₃
SrCO₃
BaCO₃

BaCO₃

BaCO₃. Since the electropositive character of the metal increases or the basicity of their hydroxides increases down the group, therefore their thermal stability increases. Hence BaCO₃ is the most stable.

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Short Answer Type

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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69.

Potassium hydroxide is a stronger base than barium hydroxide. Explain.

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70.

Give chemical equation for the preparation of beryllium hydride.

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Previous Year Papers

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Short Answer Type

Multiple Choice Questions

64. Which one of the alkaline earth metal carbonates is thermally the most stable? MgCO3CaCO3SrCO3BaCO3

Short Answer Type

64.
Which one of the alkaline earth metal carbonates is thermally the most stable?

MgCO₃
CaCO₃
SrCO₃
BaCO₃