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First member of each group of representa...

First member of each group of representative elements (i.e., s and p-block elements) shows anomalous behaviour. Illustrate with two examples.

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MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -NCERT FILE (NCERT EXEMPLAR PROBLEMS) (short answer Questions)
  1. Explain why the electron gain enthalpy of fluorine is less negative th...

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  2. All transition elements are d-block elements, but all d-block elements...

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  3. Identify the group nad valency of the elements having atomic number 11...

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  4. Ionisation enthalpies of elements of second period are given below Ion...

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  5. Among the elements, B, Al, C and Si, a) which element has the highes...

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  6. Choose the correct order of atomic redii of flourine and neon (in pm) ...

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  7. Illustrate by taking examples of transition elements and non-transitio...

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  8. Nitrogen has positive electron gain enthalpy whereas oxygen has negati...

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  9. First member of each group of representative elements (i.e., s and p-b...

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  10. p-block elements form acidic, basic and amphoteric oxides. Explain eac...

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  11. How would you explain the fact that the first ionisation enthalpy of s...

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  12. What do you undestand by exothermic reaction and endothermic reaction?...

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  13. Arrange the elements N, P, O and S in the order of i) increasing fir...

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  14. Explain the deviation in ionization enthalpy of some elements from the...

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  15. Explain the following a) Electronegatively of elements increase on m...

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  16. How does the metallic and non-metalic character vary on moving from le...

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  17. The radius of Na^(+) cation is less than that of Na atom. Give reason.

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  18. Among alkali metals which element do you expect to be least electroneg...

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