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Which of the following d- block elements...

Which of the following d- block elements has half filled penultimate d- sub shell as well as half filled valence s- sub shell ?

A

`Cr`

B

`Cu`

C

`Au`

D

`Pt`

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SHARAM PUBLICATION-D AND F BLOCK ELEMENTS-EXERCISE
  1. Which of the following transition metals show the maximum oxidation st...

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  2. Among the following series of transition metal ions the one where all ...

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  3. Which of the following d- block elements has half filled penultimate d...

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  4. The catalyst used for olefin polymerisation is

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  5. The malleability and ductility of metals can be accounted due to

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  6. Write down the electronic configuration of gadolinium (Gd). Its atom...

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  7. Which of the following ions is most stable in aqueous solution ?

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  8. For the four successive transition elements (Cr, Mn, Fe and Co), the s...

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  9. Write the electronic configuration Nickel.

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  10. Why are most of the transition metal compounds are paramagnetic ?

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  11. Which of the d - block elements are not regarded as transition element...

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  12. Why Fe^3+ is more stable than Fe^2+ ?

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  13. Why are scandium salts colourless ?

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  14. Out of the following which one has more number of unpaired electrons ?...

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  15. Why enthalpy of atomisation Zn is the lowest in the first transition s...

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  16. Between Sc^(3+) and Cr^(3+) ion which will give colourless compound.

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  17. What is the general electronic configuration of d-block elements ?

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  18. Which metals form the alloy brass ?

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  19. When Ethylene reacts with alkaline solution of KMnO4 a dihydric alcoho...

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  20. What are alloys? Name an important alloy which contains some of the la...

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