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LiH, LiF and Li(3)N show exceptional th...

LiH, LiF and `Li_(3)N` show exceptional thermal stabilites. Comment.

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`Li^(+)` is small in size and has exceptionally high charge- radius ratio. Therefore , its salts with small anions such as `F^(-),H^(-) and N^(3-)` are exceptionally stable due to their high lattice enthalpies .
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The following compounds have been arranged in the order of their increasing thermal stabilities. Identify the correct order. K_(2)CO_(3)(I),Na_(2)CO_(3)(II),Rb_(2)CO_(3)(III),Li_(2)CO_(3)(IV)

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MODERN PUBLICATION-S-BLOCK ELEMENTS ( ALKALI AND ALKALINE EARTH METALS ) -Conceptual Question 1
  1. ANOMALOUS BEHAVIOUR OF LITHIUM

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  2. Name the alkali metals which form superoxides when heated in excess of...

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  3. Name the metal which floats on water without any apparent reaction wit...

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  4. Predict giving reason, the outcome of the reaction: LiI + KF to

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  5. Why does the following reaction : proceed better with KF than w...

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  6. What compounds are formed when Li and Na combine with oxygen. Give the...

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  7. Explain why sodium is less reactive than potassium.

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  8. Why are potassium and cesium, rather than lithium can be used in photo...

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  9. Why are lithium salts commonly hydrated while those of other alkali me...

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  10. Why it LiF almost insoluble in water while LiCl is soluble not only in...

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  11. Lithium is the only alkali metal to form nitride directly. Explain .

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  12. An aqueous solution of sodium carbonate gives alkaline tests . Why ?

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  13. Why is Li(2)CO(3) decomposed at a lower temperature whereas Na(2)CO(3)...

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  14. LiH, LiF and Li(3)N show exceptional thermal stabilites. Comment.

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  15. Which out of Li or Na has greater value for the following properties :...

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  16. Which out of the following and why can be used to store an alkali met...

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  17. Why are alkali metals not found free in nature?

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  18. Why caesium can be used in photoelectric cell, while lithium cannot be...

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  19. Complete the following reactions : (i) O2^(2-) + H2O to (ii) O2^(-)...

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  20. Can potassium carbonate like sodium carbonate be prepared by Solvay pr...

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