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Account for the following : The enthalpy...

Account for the following : The enthalpy of atomization is lowest for Zn in 3d series of the transition elements.

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How would you account for the following? The atomic radii of the metals of the third (5d) series of transition elements are virtually the same as those of the corresponding members of the second (4d) series.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. How do you prepare: Na2Cr2O7 from Na2CrO4 ?

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  2. Why are Mn^(2+) compounds more stable than Fe^(2+) compounds towards o...

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  3. Account for the following : The enthalpy of atomization is lowest for ...

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  4. How would you account for the following: There is a greater range of o...

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  5. Name the element of 3d transition series which shows maximum number of...

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  6. Which transition metal of 3d series has positive E(M^(2+)|M)^(@) value...

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  7. Why Cr^(2+) is strongly reducing while Mn^(3+) is strongly oxidising ?

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  8. Name a member of the lanthanoid series which is well known to exhibit ...

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  9. Express 2120 in roman numbers.

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  10. Out of Cu^(2+) and Cu^(+) ion, which one is colourless and why?

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  11. What is lanthanoid contraction? Explain Any two consequences of lantha...

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  12. The ionisation energies of 6d elements are Greater than 3d elements. G...

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  13. Express 2121 in roman numbers.

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  14. Express 1202 in roman numbers.

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  15. Express 2123 in roman numbers.

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  16. Express 2125 in roman numbers.

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  17. Explain why [Ti (H2O)6]^(3+) is violet while [Ti (H2O)6]^(4+) is colou...

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  18. Transition metals form alloys with other transition metals. Explain.

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  19. What are the main consequences of lanthanoid contraction ?

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  20. What happens when K2Cr2O7 reacts with NaCl in the presence of conc. H2...

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