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Complete the following chemical reaction...

Complete the following chemical reaction equations :
(i) `MnO_(4)^(-)(aq)+C_(2)O_(4)^(2-)(aq)+H^(+)(aq)to`
(ii) `Cr_(2)O_(7)^(2-)(aq)+Fe^(2+)(aq)+H^(+)(aq)to`

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(i) `2MnO_(4)^(-)(aq)+5C_(2)O_(4)^(2-)(aq)+16H^(+)(aq)to2Mn^(2+)(aq)+8H_(2)O(l)+10CO_(2)(g)`
(ii) `Cr_(2)O_(7)^(2-)(aq)+6Fe^(2+)(aq)+14H^(+)(aq)to2Cr^(3+)(aq)+6Fe^(3+)(aq)+7H_(2)O(l)`
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Complete the following chemical equations : (i) MnO_(4)^(-) (aq) + S_(2)O_(3)^(2-) (aq) + H_(2) O(l) to1 (ii) Cr_(2)O_(7)^(2-) (aq) + Fe^(2+)(aq) + H^(+) (aq) to

(a) Complete the following chemical equations : (i) MnO_(4)^(-) (aq) + S_(2)O_(3)^(2-) (aq) + H_(2)O(l) to (ii) Cr_(2)O_(7)^(2-)(aq)+Fe^(2+) (aq) + H^(+) (aq) to (b) Explain the following observatons : (i) La^(3+) (Z = 57) and Lu^(3+) (Z = 71) do not show any colour in solutions. (ii) Among the divalent cations in the first series of transition elements, manganese exhibits the maximum paramagnetism. (iii) Cu^(+) ion is not known in aqueous solutions.

Complete the following chemical equation: (i) MnO_(4)^(-)(aq)+s_(2)O_(3)^(2-)(aq)+H_(2)O(I) to (ii) MnO_(4)^(-) +NO_(2)^(-)+H^(+) to

(a) Complete the following chemical equations for reactions : (i) MnO_(4(aq))^(-) + S_(2)O_(3(aq))^(2-) + H_(2)O_((l)) to (ii) Cr_(2)O_(7 (aq))^(2-) + H_(2)S_((g)) + H_((aq))^(+) to (b) Give an explanation for each of the following observations : (i) The gradual decrease in size (actinoid contraction) from element to element is greater among the actinoids than that among the lanthanoids (lanthanoid contraction.) (ii) The greatest number of oxidation states are exhibited by the members in the middle of a transition series. (iii) With the same d-orbitals configuration (d^(4)) Cr^(2+) ion is a reducing agent but Mn^(3+) ion is an oxidising agent .

U-LIKE SERIES-THE D-AND F-BLOCK ELEMENTS -SHORT ANSWER QUESTIONS (2 marks each)
  1. How would you account for the following: (i) Cr^(2+) is reducing in ...

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  2. Explain the following observations: (i) Generally there is an increa...

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  3. Complete the following chemical reaction equations : (i) MnO(4)^(-)(...

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  4. Explain the following giving reasons : (i) It is difficult to separa...

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  5. The sum of the first and second ionisation enthalpies and those of thi...

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  6. Compare the relative stability of +2 oxidation states in aqueous solut...

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  7. A mixed oxide of iron and chromium FeO.Cr(2)O(3) is fused with sodium ...

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  8. Complete the following reactions : (a) (NH(4))(2)Cr(2)O(7)overset(He...

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  9. Why E^(@) values for Mn, Ni and Zn are more negative than expected ?

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  10. Out of Cu(2)Cl(2) and CuCl(2), which is more stable and why ?

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  11. Although fluorine is more electronegative than oxygen, but the ability...

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  12. Transition metals show high melting points. Why?

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  13. When Cu^(2+) is treated with KI, a white precipitate is formed. Explai...

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  14. When a brown compound of manganese (A) is treated with HCl it gives a ...

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  15. Explain why (i) E^(@) for Mn^(3+)//Mn^(2+) couple is more positive t...

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  16. With the help of ionic equations, describe what happens when (i) pH ...

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  17. Although Zr belongs to 4d and Hf belongs to 5d transition series, but ...

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  18. The outer electronic configurations of two transition metals are (i) 3...

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  19. The second and third rows of transition elements resemble each other m...

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  20. Although Cr^(3+) and Co^(2+) ions have the same number of unpaired ele...

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