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The second and third rows of transition ...

The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain, why?

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Due to lanthanoid contractions, the atomic radii of the second and third row transition elements is almost same. So, they resemble each other much more as compared to first row elements and show similar character.
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NCERT EXEMPLAR ENGLISH-D AND F-BLOCK ELEMENTS-Short Answer Type Question
  1. Why does copper not replace hydrogen from acids?

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

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  3. Why first ionisation enthalpy of Cr is lower than that of Zn?

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  4. Transition elements show high melting points. Why?

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  5. When Cu^(2+) ion is treated with KI, a white precipitate is formed. Ex...

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

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

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

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  9. Although Cr^(3+) and Co^(2+) ions have same number of unpaired electro...

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  10. Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa and U. W...

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  11. Although Zr belongs to 4d and Hf belongs to 5d transition series but i...

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  12. Cerium shows oxidation state of +4 because

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  13. Explain why does colour of KMnO(4) disappear when oxalic acid is added...

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  14. When orange solution containing Cr(2)O(7)^(2-) ion is treated with an ...

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  15. A solution of KMnO(4) on reduction yields either a colourless solution...

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

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  17. E^(Theta) of Cu is +0.34V while that of Zn is -0.76 V. Explain.

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  18. The halides of transition elements become more covalent with increasin...

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  19. While filling up of electrons in the atomic orbitals, the 4s orbital i...

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  20. Reactivity of transition elements decreases almost regularly from Sc t...

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