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The main source of energy is ….. ....

The main source of energy is ….. .

A

`FtoF^(-)`

B

`CltoCl^(-)`

C

`OtoO^(2-)`

D

`HtoH^(-)`

Text Solution

Verified by Experts

The correct Answer is:
C
`OtoO^(2-)` requires energy for accepting two electrons. After accepting one electron, acceptance of second electron becomes difficult due to electron-electron repulsion. Therefore gaining of second electron requires more energy.
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OMEGA PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Multiple Choice Questions (MCQs)
  1. Which of the following is/are correct?

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  2. The energy required to remove an electron from a gaseous atom from its...

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  3. In a period from Li to F ionisation enthalpy

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  4. Given the correct order of electronegativity of central atom in follow...

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  5. The electronegativities of F and H are 4.0 and 2.1 respectively. The p...

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  6. Which of the following element has maximum electron gain enthapy(neg...

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  7. The main source of energy is ….. .

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  8. The 3rd period of the periodic table contains

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  9. Which of the elements show least values of ionisation energies within ...

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  10. r("van der Waal") is

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  11. Which of the following does not have any unit?

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  12. The size of following species increases in the order

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  13. How does ionisation energy vary along a period and down a group ?

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  14. Amongst the following electronic configurations which one will have hi...

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  15. Which period of the periodic table contains maximum number of elements...

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  16. The outermost electronic configuration of the element with highest val...

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  17. Which is the most electronegative element among the following :

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  18. In a given shell, the order of screening effect is

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  19. The size of isoelectronic species F^(-)Ne and Na^(+) is affected by

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  20. The elements of group 16 are called

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