How will you explain the reactivity of alkali metals with haloge

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 Multiple Choice QuestionsShort Answer Type

111.

Complete the following equations:
(i) 2Li + NH3 
(ii) LiNO subscript 3 space rightwards arrow with Heat on top
(iii) 
(iv) 2

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112.

Write two properties of lithium carbonate in which it differs from other alkali metal carbonates.

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113.

Why is Li2CO3 decomposed at a lower temperature while Na2CO3 at higher temperature?

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114.

Why is LiF almost insoluble in water whereas LiCl in soluble not only in water but also in acetone? 

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115.

How would you explain that the following observations?
LiI is more soluble than KI in ethanol?

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 Multiple Choice QuestionsLong Answer Type

116.

Explain: Lithium exhibits anamalous behaviour in the company of alkali metals.
Or
Name the chief factor responsible for the anomalous behaviour of lithium.
Or
List three properties of lithium in which it differs from the rest of the alkali metals.

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 Multiple Choice QuestionsShort Answer Type

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117.

How will you explain the reactivity of alkali metals with halogens ?


Alkali metals combine with halogens to form metal halides, which are ionic crystalline solids having general formula M+X.

Reactivity of alkali metals with particular halogen increases from Li to Cs. On the other hand, the reactivity of halogens with particular alkali metal M decreases from F2 to I2.

All the halides of alkali metals except lithium fluoride are freely soluble in water. The low solubility of lithium fluoride is attributed to the greater force of attraction between lithium ions and fluoride ions in the crystal lattice.
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 Multiple Choice QuestionsLong Answer Type

118.

How will you explain the ionic character of alkali metal halides?

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119.

In what ways lithium shows similarities to magnesium in its chemical behaviour?
Or
List four properties to show the diagonal relationship between lithium and magnesium.

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 Multiple Choice QuestionsShort Answer Type

120.

How does lithium occur in nature? Name the chief ores of lithium.

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