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Questions carrying two marks : Beryllium and magnesium do not give colour flame whereas other alkaline earth metals do so,why?

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Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?

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PATHFINDER-S-BLOCK ELEMENTS-QUESTION BANK
  1. How is BeCl2 prepared ? What is its structure in solid state and vapou...

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  2. What is hydrolith ? How is it prepared?

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  3. Questions carrying two marks : Beryllium and magnesium do not give co...

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  4. Questions carrying 2 marks : Addition of NaOH solution to a solution o...

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  5. Questions carrying 2 marks : What is magnesia cement? Give its compos...

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  6. Give chemical equations for the various reactions taking place during ...

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  7. Chlorination of calcium hydroxide produces bleaching powder. Write its...

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  8. What happens when : Carbon dioxide gas is passed through an aqueous so...

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  9. What happens when : Potassium carbonate is heated with milk of lime. G...

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  10. What happens when : Lithium nitrate is heated. Give chemical equations...

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  11. Explain why : Lithium on being heated in air mainly forms the monoxide...

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  12. Explain why : K, Rb, and Cs, on being heated in the presence of excess...

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  13. Why aqueous solution of Na2CO3 is alkaline.

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  14. Give reasons for the following: In aqueous solution, Li^+ ion has lowe...

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  15. Account for the following: LiCl has lower melting point than NaCl.

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  16. NaCl has higher melting point that KCl.

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  17. How would you distinguish between. BeSO4 and BaSO4

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  18. How would you distinguish between. KNO3 and LiNO3

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  19. How would you distinguish between. NaHCO3 and Na2CO3

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  20. Give reasons for the following: In aqueous solution, Li^+ ion has lowe...

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