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Give justification, The first lonisation...

Give justification, The first lonisation enthalpy of carbon is greater than that of boron, whereas the reverse is correct for the second ionisation enthalpy.

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V PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-QUESTION BANK
  1. Arrange the following in decreasing order of their van der Waals radii...

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  2. Among the elements B, Al, C and Si. a. Which has the highest first io...

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  3. Give justification, The first lonisation enthalpy of carbon is greater...

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  4. i. Predict my group. My characters are a. electrons in my hand are ju...

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  5. A cation is smaller than the corresponding neutral atom while an anion...

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  6. State the modern periodic law

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  7. The modern periodic table is based on:- variation of densities, vari...

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  8. The elements which form coloured ions and show paramagnetism are: Alka...

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  9. Which among the following is isoelectronic with NH3 ? CH4, CO^+...

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  10. Which is the correct order with réspect to the first ionisation potent...

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  11. The electronegativity of elements from left to right in a period of pe...

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  12. Which element has smallest size?

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  13. The family of elements with the highest ionisation enthalpy:

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  14. Which of the following has largest negative electron gain enthalpy?

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  15. Which one of the following elements belongs to the family of elements ...

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  16. The anion O^- is isoelectronic with N^(2-), F^-, N^(3-), ...

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  17. Which of the following is not a transition metal? Silver, Lead, Tun...

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  18. The ionic size of Na^+, Mg^(2+), Al^(3+) and Si^(4+) follows the order...

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  19. Amongst the following elements (where electronic configurations are gi...

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  20. The penetration of the electrons in any principal shell varies as: sg...

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