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Which of the following relation is corre...

Which of the following relation is correct with respect to first `(I)` and second `(II)` ionization enthalpies of potassium and calcium?

A

`I_(Ca) gt II_(K)`

B

`I_(K) gt I_(Ca)`

C

`II_(Ca) gt II_(K)`

D

`II_(K) gt II_(Ca)`

Text Solution

Verified by Experts

The correct Answer is:
D
Second ionisation energy of potassium is greater than that of `Ca`. In case of potassium ion (i.e. `K^(+))` the electron removal from the stable inert gas configuration `(1s^(2)2s^(2)2p^(5)3s^(2)3p^(5))` requires much higher energy.
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RESONANCE-PERIODIC TABLE & PERIODICITY-Exercise
  1. The first ionisation potential of Na,Mg,Al and Si are in the order

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  2. Which represents alkali metals (i.e. 1^(st) group metals) based on (IE...

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  3. Which of the following relation is correct with respect to first (I) a...

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  4. Among halogens, the correct order of amount of energy released in elec...

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  5. Which of the following will have the most negative electron gain entha...

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  6. The order of electron gain enthalpy (magnitude) of O, S and Se is:

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  7. Electronic configuratios of four elements A, B, C and D are given belo...

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  8. Which of the following statements is correct?

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  9. Which of the following is affected by the stable electron configuratio...

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  10. The electronegativity values of C, N, O and F on Pauling scale:

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  11. Correct order of electronegativity of N,P,C and Si on Pauling scale is...

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  12. The correct order of electronegativity on Pauling scale is:

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  13. Which of the following is most electronegative element.

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  14. Which of the following is true about the element .(33)As according to ...

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  15. Which of the following contains atomic number of only s-block

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  16. Screening effect is not observed in :

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  17. Which of the following have higher Z(eff) than Fluorine.

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  18. The oxidation number that iron does not exhibit in its common compound...

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  19. Which of the following can show +7 oxidation state?

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  20. Which of following does not exist:

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