Home
Class 12
CHEMISTRY
F- centres in an ionic crystal are a. ...

F- centres in an ionic crystal are
a. lattice sites containing electrones
b. interstitial sites containing electrons
c. lattice cites that are vacant

Text Solution

Verified by Experts

The correct Answer is:
a.lattice sites containing electrones
Promotional Banner

Similar Questions

Explore conceptually related problems

In a solid lattice, the cation has left a lattice site and is located at interstitial position, the lattice defect is:

A metalic element crystallizes into a lattice containing a sequence of layers ABCABC. What percentage by volume of this lattice is empty space?

F centre is an example of metal excess defect due to the presence of extra cations at interstitial sites. Zinc oxide is white in colour at room temperature, on heating it loses oxygen and turns yellow. ZnO overset("Heat")toZn^(2+)+(1)/(2)O_(2)+2e^(-) Now there is excess of zinc in the crystal and its formula becomes Zn_(1+x) O. the excess of Zn^(2+) ions move to interstitial sites and the electrons to neighbouring interstitial sites. There are many solids which are difficult to prepare in the stiochiometric composition and contain less amount of the metal as compared to stiochiometric proportion. a typical example of this type is FeO which is mostly found with a composition of Fe_(0.95) . it may actually range from Fe_(0.96) O. Q. In Fe_(0.95) O:

A metalic element crystallizes into a lattice containing a sequence of layers ABCABC. What is the co-ordination number of the above close packing ?

A metalic element crystallizes into a lattice containing a sequence of layers ABCABC. Name the type of close packing in this element.

Consider a FCC crystal lattice with anions ‘Q’. If half of the octahedral sites of the lattice are occupied by the.cations ‘P’. Write the formula of the crystal.

A metallic element crystallises into a'lattice containing a sequence of layers of 'A B A B A B' Any packing of spheres leaves out voids. in the lattice. What percentage by volume of this lattice is empty space?

MAXIMUM PUBLICATION-THE SOLID STATE-EXAMPLE
  1. The 14 possible three dimenstional crystal lattices are called ͟ ...

    Text Solution

    |

  2. Which of the following type of cubic lattices has maximum number of ...

    Text Solution

    |

  3. F- centres in an ionic crystal are a. lattice sites containing elec...

    Text Solution

    |

  4. The colour imparted by excess potassium in KCI crystal is ͟ ͟ ͟...

    Text Solution

    |

  5. Which of the following substances show antiferromagnetism?

    Text Solution

    |

  6. The number of tetrahedral and octahedral voids in a ccp array of 100 a...

    Text Solution

    |

  7. Potassium dichromate belongs to which crystal system

    Text Solution

    |

  8. A solid compound contains XYZ atoms in a cubic lattice with X atoms o...

    Text Solution

    |

  9. The empty space in body centred cubic lattice is

    Text Solution

    |

  10. Which solid has weakest intermolecular force

    Text Solution

    |

  11. In crystalline solid, atoms, ions or molecules are held in an orderly ...

    Text Solution

    |

  12. Write the names of A and B?

    Text Solution

    |

  13. Identify and write the name of the shaded parts of A and B?

    Text Solution

    |

  14. Teacher said that Frenkel defect will not happen in alkali metal halid...

    Text Solution

    |

  15. "Dielectric substances are related to conductors. "Dielectric substanc...

    Text Solution

    |

  16. "Dielectric substances are related to conductors. "Dielectric substanc...

    Text Solution

    |

  17. Identify A and B.

    Text Solution

    |

  18. Explain them.

    Text Solution

    |

  19. Name the unit of magnetic moment

    Text Solution

    |

  20. Match the following. Paramagnetic - Fe3O4 Ferromagnetic - O2. A...

    Text Solution

    |