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The s-Block Elements

Short Answer Type

81.

What is magnesia cement or Sorel's cement?

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82.

What happens when a burning magnesium ribbon is introduced into a jar of carbon dioxide?

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83.

Bones contain calcium ions. What do you think which anions are associated with them?

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84.

What happens when calcium oxide is strongly heated with coke?

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85.
Why is calcium preferred over sodium to remove last traces of moisture from alcohol?

Both Na and Ca react with water to form their respective hydroxides. In contrast, Na reacts with alcohol to form sodium ethoxide but calcium does not.

Therefore, calcium is preferred over sodium.

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86.

What is concrete?

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87.

What is fly ash?

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88.

What are representative elements?

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Long Answer Type

89.

Name the elements of group 1. Write their electronic configurations.

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Short Answer Type

90.

Discuss the general trends in atomic and ionic radii of alkali metals.

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

85. Why is calcium preferred over sodium to remove last traces of moisture from alcohol?

Long Answer Type

Short Answer Type

85.
Why is calcium preferred over sodium to remove last traces of moisture from alcohol?