Chemistry Class-11: Chapter –10. The s-Block Elements Part – 5

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III. Short Answer Type

Question: 29

How do your account for the strong reducing power of lithium in aqueous solution?

Answer:

Question: 30

When heated in air, the alkali metals form various oxides. Mention the oxides formed by Li, Na and K.

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Question: 31

Complete the following reactions

(i)

(ii)

Answer:

(i)

(ii)

Question: 32

Lithium resembles magnesium in some of its properties. Mention two such properties and give reasons for this resemblance.

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Question: 33

Name an element from Group 2 which forms an amphoteric oxide and a water soluble sulphate.

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Question: 34

Discuss the trend of the following:

(i) Thermal stability of carbonates of Group 2 elements.

(ii) The solubility and the nature of oxides of Group 2 elements.

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Question: 35

Why are and readily soluble in water while , and are insoluble?

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Question: 36

All compounds of alkali metals are easily soluble in water but lithium compounds are more soluble in organic solvents. Explain.

Answer:

Question: 37

In the Solvay process, can we obtain sodium carbonate directly by treating the solution containing with sodium chloride? Explain.

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Question: 38

Write Lewis structure of ion and find out oxidation state of each oxygen atom? What is the average oxidation state of oxygen in this ion?

Answer:

Question: 39

Why do beryllium and magnesium not impart color to the flame in the flame test?

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Question: 40

What is the structure of molecule in gaseous and solid state?

Answer

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