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How many unpaired electron are present C...

How many unpaired electron are present `Co^(3+)` ion?

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PATHFINDER-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-QUESTION BANK
  1. Match the following columns

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  2. IE and EA values of an element are 13eV and 3.8 eV respectively. Its e...

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  3. How many unpaired electron are present Co^(3+) ion?

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  4. The effective nuclear charge of N atom is :

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  5. The ionisation energy of lithium is 500 KJ mol^(-1) The amount of ener...

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  6. How many groups are occupied by P-block element in the long form of pe...

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  7. Why the electron gain enthalpy values of alkaline earth metals are low...

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  8. Select neutral acidic basic and amphoteric oxides from the following ...

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  9. Ionisation energy and electron affinity of fluorine are respectively 1...

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  10. Match the following columns

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  11. Arrange the following ions in the increasing order of their size :Be^(...

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  12. Match the following columns

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  13. Match the following columns

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  14. Match the following columns

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  15. As per the modern periodic law the physical and chemical properties of...

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  16. Which of these does not reflect the periodicity of the elements

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  17. Which of the following pairs of atomic numbers represent elements belo...

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  18. All the elements in a group in the periodic table have the same

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  19. The elements in which 4f orbitals are progressively filled up are call...

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  20. Which of the following elements does not belong to first transition se...

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