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Describe the importance of the given: Pl...

Describe the importance of the given: Plaster of Paris.

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CHHAYA PUBLICATION-s-BLOCK ELEMENTS -SOLVED NCERT EXERCISE
  1. Describe the importance of the given: limestone.

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  2. Describe the importance of the given: cement.

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  3. Describe the importance of the given: Plaster of Paris.

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  4. Why are lithium salts commonly hydrated and those of the other alkali ...

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  5. Why is LiF almost insoluble in water whereas LiCl soluble not only in ...

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  6. Explain the significance of sodium, potassium, magnesium and calcium i...

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  7. What happen when sodium metal is dropped in water ?

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  8. What happen when sodium metal is heated in free supply of air ?

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  9. What happen when sodium peroxide dissolves in water?

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  10. Comment on each of the given observations : The mobilities of the alka...

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  11. Comment on each of the given observations : Lithium is the only alkali...

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  12. Comment on each of the given observations : E^(0) for M^(2+) (aq) + 2e...

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  13. State as to why a solution of Na2CO3 is alkaline?

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  14. State as to why alkali metals are prepared by electrolysis of their fu...

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  15. State as to why sodium is found to be more useful than potassium?

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  16. Write balanced equations for reactions between Na2O2 & water.

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  17. Write balanced equations for reactions between KO2 & water.

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  18. Write balanced equations for reactions between Na2O &CO2.

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  19. How would you explain the given observations? BeO is almost insolubl...

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  20. How would you explain the given observations? Ba0 is soluble but BaS...

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