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The colour of K(2)Cr(2)O(7) solution cha...

The colour of `K_(2)Cr_(2)O_(7)` solution changes with the change in pH of the medium. Why ?

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Colour of acidified K_(2)Cr_(2)O_(7) is not changed by:

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Explain how the colour of K_2Cr_2O_7 solution depends on pH of the solution.

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DINESH PUBLICATION-D-AND -F BLOCK ELEMENTS-Question From Board Examination
  1. Complete the following reactions : (i) Cr(2)O(7)^(2-)+Sn^(2+)+H^(+) ...

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  2. Explain why Zn^(2+) salts are colourless while Ni^(2+) salts are colou...

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  3. The colour of K(2)Cr(2)O(7) solution changes with the change in pH of ...

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  4. Why is +2 oxidation state of manganese quite stable while the same is ...

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  5. Write the electronic configuration of the element with atomic number 1...

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  6. Which out of the two ,La(OH)(3) and Lu(OH)(3), is more basic and why?

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  7. Why are Zn, Cd and Hg quite soft and have low melting points ?

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  8. Lanthanoid contraction is caused due to:

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  9. What may the possible oxidation state of transition metals with the fo...

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  10. Discuss the relative stability in aqueous solution of +2 oxidation sta...

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  11. How many unpaired electrons are present in Mn^(2+) ion ? How do they i...

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  12. Complete the following chemical equations for reactions in aqueous sol...

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  13. There is a greater range of variable oxidation states among the actino...

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  14. Why is ghere a general increase in density of elements from titanaium ...

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  15. Three occurs much more frequently metal-metal bonding in the compound...

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  16. Why is Cu^(+) ion not stable in aqueous solution ? or Why is Cu^(+...

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  17. Complete the following : (i) Cr(2)O(7)^(2-)(aq)+H(2)S(g)+H^(+)(aq) t...

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  18. Which is a stronger reducing agent Cr^(2+) or Fe^(2+) and why?

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  19. Among the divalent cations in the first transition series, manganese e...

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  20. La^(3+)(Z=57) and Lu^(3+)(Z=71) do not show any colour in solution. As...

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