Home
Class 11
CHEMISTRY
The first ionisation potential of Na is ...

The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of `Na^(+)` will be-

A

`+2.55eV`

B

`-2.55eV`

C

`-5.1eV`

D

`-10.2eV`

Text Solution

Verified by Experts

The correct Answer is:
C
For any element, value of first ionisation potential and that of the electron-gain enthaly of its unipositive ion. However, for electron-gain enthalpy energy is liberated while for ionisation potential energy is absorbed. Hence, they have same magnitude but opposite sign.
Promotional Banner

Topper's Solved these Questions

  • CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES

    CHHAYA PUBLICATION|Exercise MCQ HOTSPOT|45 Videos

  • CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES

    CHHAYA PUBLICATION|Exercise MCQ HOTSPOT (More than One correct Type)|20 Videos

  • CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES

    CHHAYA PUBLICATION|Exercise HIGHER ORDER THINKING SKILLS (HOTS) QUESTIONS|17 Videos

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    CHHAYA PUBLICATION|Exercise PRACTICE SET|10 Videos

  • REDOX REACTIONS

    CHHAYA PUBLICATION|Exercise PRACTICE SET|4 Videos

Similar Questions

Explore conceptually related problems

Why is the value of electron-gain enthalpy negative?

What is the value of electron-gain enthalpy of Na^(+) if IE_(1) of Na=5.1 eV-

The first ionization potential of Na,Mg,Al and Si are in the order

Why Noble gases have zero electron gain enthalpy?

Why first ionisation enthalpy of Cr is lower than that of Zn ?

The first ionisation potential of carbon is 11.2 eV. State whetehr the value of first ionisation potential of silicon is same or greater or less than that of carbon.

The number of electrons is Na^(+4)

First ionisation enthalpy off Na is less than that of Mg, but second ionisation enthalpy of Na is higher than that of Mg. explain.

Why are electron-gain enthalpy of Be and N positive?

CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-ENTRANCE QUESTION BANK
  1. Which of the following orders presents correct sequence of the increas...

    Text Solution

    |

  2. The increasing order of the ionic radii of the given isoelectronic spe...

    Text Solution

    |

  3. The first ionisation potential of Na is 5.1 eV. The value of electron ...

    Text Solution

    |

  4. Which of the given represents correct order of incrasing first ionisat...

    Text Solution

    |

  5. Which one has the highest boiling point-

    Text Solution

    |

  6. Ionic radii (Å) of N^(3-),O^(2-) and F^(-) are -

    Text Solution

    |

  7. Which of the following atoms ha the highest first ionisation energy-

    Text Solution

    |

  8. The group having isoelectronic species is-

    Text Solution

    |

  9. Both lithium and magnesium displace several similar propertiess due to...

    Text Solution

    |

  10. What is the value of electron-gain enthalpy of Na^(+) if IE(1) of Na=5...

    Text Solution

    |

  11. In which of the following arrangements, given sequence is not accordin...

    Text Solution

    |

  12. Identify the wrong statement among the following-

    Text Solution

    |

  13. Reason of lanthanoid contraction is-

    Text Solution

    |

  14. Be^(2+) is isoelectronic with which of the following ions?

    Text Solution

    |

  15. Which of the following orders of ionic radii is correctly represented ...

    Text Solution

    |

  16. The species Ar, K^(+) and Ca^(2+) contain the same number of electrons...

    Text Solution

    |

  17. Because of lanthanide contraction, which of the following pairs of ele...

    Text Solution

    |

  18. In which of the following options the order of arrangement does not ag...

    Text Solution

    |

  19. The element Z=114 has been discovered recently. It will belong to whic...

    Text Solution

    |

  20. Among CaH(2),BeH(2),BaH(2), the order of ionic character is-

    Text Solution

    |