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

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:

A

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

B

Oxygen has high electrons affinity

C

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

D

Oxygen is more electronegative

Text Solution

Verified by Experts

The correct Answer is:
C
`O^(-)` acquires negative charge and thus shows repulsion for another electron.
Promotional Banner

Topper's Solved these Questions

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES

    A2Z|Exercise Electron Gain Enthalpy|34 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES

    A2Z|Exercise Electronegativity And Nature Of Oxides|42 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES

    A2Z|Exercise Atomic Radius, Screening Effect And Penetration Effect|52 Videos

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • CLASSIFICTION, PURIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    A2Z|Exercise Section D - Chapter End Test|30 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^(-) = O_((g))^(-) DeltaH^(@) =- 142 kJ mol^(-1) O_((g))^(-) + e^(-) = O_((g))^(2-) DeltaH^(@) = 844 kJ mol^(-1) This is because of :

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

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

A2Z-CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES-Ionisation Energy
  1. The ionisation energy of nitrogen is more than that of oxygen because

    Text Solution

    |

  2. Which of correct about ionisation potential?

    Text Solution

    |

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

    Text Solution

    |

  4. Mg and Li are similar in their properties due to

    Text Solution

    |

  5. Maximum I.E. Is for

    Text Solution

    |

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

    Text Solution

    |

  7. A sudden jump- between the values of second and third ionisation energ...

    Text Solution

    |

  8. A neutral atom will have the lowest ionisation potential when its elec...

    Text Solution

    |

  9. Which of the following is incorrect?

    Text Solution

    |

  10. The process requiring the absorption of energy is

    Text Solution

    |

  11. Which of the following sequence regarding the first ionisation potenti...

    Text Solution

    |

  12. The element with highest value of ionisation potential is

    Text Solution

    |

  13. In halogens, with increase of atomic number where habit is found

    Text Solution

    |

  14. Which of the following transitions involves maximum amount of energy?

    Text Solution

    |

  15. A rarr A^(+)+e,E(1) and A^(+) rarr A^(2+)+e,E(2). The energy required ...

    Text Solution

    |

  16. Which of the following relation is correct with respect first (I) and ...

    Text Solution

    |

  17. How many ionisation energies can carbon have?

    Text Solution

    |

  18. The correct sequence of elements in decreasing order first ionisation ...

    Text Solution

    |

  19. The first ionisation potentials (eV) of Be and B respectively are

    Text Solution

    |

  20. the highest ionisation energy stands for

    Text Solution

    |