Home
Class 12
CHEMISTRY
Halogens have maximum negative gain enth...

Halogens have maximum negative gain enthalpy in the respective periods of the periodic table. Why?

Text Solution

Verified by Experts

Halogens have the smallest size in their respective periods and therefore high effective nuclear charge. As a consequence, they readily accept one electron to acquire noble gas electronic configuration.
Promotional Banner

Topper's Solved these Questions

  • THE P-BLOCK ELEMENTS

    NCERT|Exercise EXERCISE|74 Videos

  • THE D AND F BLOCK ELEMENTS

    NCERT|Exercise Exercise|38 Videos

  • THE SOLID STATE

    NCERT|Exercise Solved Examples|3 Videos

Similar Questions

Explore conceptually related problems

Why do halogens have maximum negative electron gain enthalpy in the respective periods of the periodic table?

Be and Ne have positive values of electron gain enthalpy against the general trend in their period in modern periodic table. Explain.

The halogens have the smallest atomic radii in their respective periods. The atomic radius of fluorine is extremely small. All halogens exhibit -1 oxidation state. They are strong oxidising agents and have maximum negative electron gain enthalpy. Among halogens, fluorine shows anomalous behaviour in many properties: For example electronegativity and ionisation enthalpy are higher for fluorine than expected whereas bond dissociation enthalpy, m.p. and b.p.and electron gain enthalpy are quite lower than expected. Halogens react with hydrogen to give hydrogen halides (HX) and combine amongst themselves to form a number of compounds of the type XX', XX'_(3), XX'_(5) and XX'_(7) called inter halogens. Why halogens have maximum negative electron gain enthalpy?

Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic table.

NCERT-THE P-BLOCK ELEMENTS-EXERCISE
  1. Halogens have maximum negative gain enthalpy in the respective periods...

    Text Solution

    |

  2. Why are pentahalides of P,As,Sb and Bi are more covalent than trihalid...

    Text Solution

    |

  3. Why is BiH3 the strongest reducing agent amongst all the hydrides of g...

    Text Solution

    |

  4. Why is N(2) less reactive at room temperature ?

    Text Solution

    |

  5. Mention the conditions required to maximise the yield of ammonia.

    Text Solution

    |

  6. How does ammonia react with a solution of Cu^(2+)?

    Text Solution

    |

  7. What is the covalence of nitrogen in N2O5?

    Text Solution

    |

  8. Bond angle in PH(4)^(+) is higher than that in PH(3).Why ?

    Text Solution

    |

  9. What happens when white phosphorus is heated with concentrated NaOH so...

    Text Solution

    |

  10. What happens when PCl(5) is heated?

    Text Solution

    |

  11. Write a balanced equation for the reaction of PCl5 in heavy water.

    Text Solution

    |

  12. What is the basicity of H(3)PO(4) ?

    Text Solution

    |

  13. What happens when H(3)PO(3) is heated.

    Text Solution

    |

  14. List the important sources of sulphur.

    Text Solution

    |

  15. Write the order of thermal stability of the hydrides of group 16 eleme...

    Text Solution

    |

  16. Why is H(2)O a liquid and H(2)S a gas?

    Text Solution

    |

  17. Which of the following does not react with oxygen directly? Zn,Ti,Pt,F...

    Text Solution

    |

  18. Complete the following reactions: (i) C(2) H(4) + O(2) to (ii)...

    Text Solution

    |

  19. Why does O3 act as a powerful oxidising agent?

    Text Solution

    |

  20. How is O(3) estimated quantitatively ?

    Text Solution

    |

  21. What happens when sulphur dioxide is passed through an aqueous solutio...

    Text Solution

    |