Home
Class 11
CHEMISTRY
The formation of the oxide ion O^(2-)(g)...

The formation of the oxide ion `O^(2-)(g)` requires first an exothermic and then an endothermic step as shown below:
`O(g)+e^(-) rarr O^(-)(g)`, `DeltaH=-142 kJ mol^(-1)`
`O^(-)(g)+e rarr O^(2-)(g)`, `DeltaH=844kJ mol^(-1)`
This is because:

A

oxygen is more electronegative

B

`O^(-)` ion has comparatively larger size than oxygen atom

C

`O^(-)` ion will tend to resist the addition of another atom

D

oxygen has high electron affinity.

Text Solution

Verified by Experts

The correct Answer is:
C
This is because `O^(-)` will tend to resist the addition of another electron.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    DINESH PUBLICATION|Exercise COMPREHENSION|4 Videos

  • ENVIRONMENTAL CHEMISTRY

    DINESH PUBLICATION|Exercise Integer Type Questions|4 Videos

Similar Questions

Explore conceptually related problems

The formation of the oxide ion O_(g)^(2-) requires first an exothermic and then an endothermic step as shown below: O_(g)+e^(-) rarr O_(g)^(-) , DeltaH=-142 kJ mol^(-1) O(g)+e rarr O_(g)^(2-) , DeltaH=844kJ mol^(-1) This is because:

The formation of oxide ion O^(2-)(g) from oxygen atom requires first an exothermic and then an endothermic step as shown below O(g)+e^(-) rarr O^(-)(g), DeltaH^(-) = - 141 kj mol^(-1) O^(-)(g) +e^(-) rarr O^(2-) (g), DeltaH^(-) =+ 780 kj mol^(-1) Thus, process of formation of O^(2-) in gas phase is unfavourable even through O^(2-) is isoelectronic with neon. It is due to the fact that

The formation of the oixde ion, O^(2+)(g) from oxygen atom requires first an exothermic and then an endothermic step as shown below: O(g)+e^(-) rarr O^(-)(g), Delta H^(O)=-141kJ mol^(-) O(g)+e^(-) rarr O^(-)(g), H^(O)=-kJ mol^(-) Thus the process of formation of O^(2-) in gas phase is neon. It is due to the fact that

DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
  1. Which one of the following sets of ions represents the collection of i...

    Text Solution

    |

  2. Among Al(2)O,SiO(2),P(2)O(3) and So(2) the correct order of acid stren...

    Text Solution

    |

  3. The formation of the oxide ion O^(2-)(g) requires first an exothermic ...

    Text Solution

    |

  4. Which one of the following ions has the highest value of ionic radius?

    Text Solution

    |

  5. Ionic radii are

    Text Solution

    |

  6. Four successive members of the first row transition elements are liste...

    Text Solution

    |

  7. Which of the following oxides is amphoteric is nature ?

    Text Solution

    |

  8. In which of the following arrangements the order is NOT according to t...

    Text Solution

    |

  9. Which one of the following arrangements represents the correct order o...

    Text Solution

    |

  10. Order of first ionisation potentials of elements Li,Be,B, Na is

    Text Solution

    |

  11. Which of the following is an inert gas?

    Text Solution

    |

  12. Identify the correct order in which the covalent radius of the followi...

    Text Solution

    |

  13. Match 1list I with list II and select the correct answer using the cod...

    Text Solution

    |

  14. In the following, the element with the highest ionization energy is

    Text Solution

    |

  15. One mole of magnesium in the vapor state absored 1200 kJ mol^(-1) of e...

    Text Solution

    |

  16. Among the following transition elements, pick out the element/elements...

    Text Solution

    |

  17. Which of the following species has the highest electron affinity?

    Text Solution

    |

  18. The correct order of atomic sizes is

    Text Solution

    |

  19. Which electronic configuration of an element has abnormally high diffe...

    Text Solution

    |

  20. The electronic configurations of four elements are given below. Arrang...

    Text Solution

    |