Home
Class 12
CHEMISTRY
F-centre is-...

F-centre is-

A

anion vacancy occupied by unpaired electron

B

anion vacancy occupied by paired electrons

C

cation vacancy occupied by electron

D

anion present in interstitial site

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    CHHAYA PUBLICATION|Exercise SOLVED NCERT EXEMPLAR PROBLEMS|53 Videos
  • SOLID STATE

    CHHAYA PUBLICATION|Exercise SHORT ANSWER TYPE|10 Videos
  • SOLID STATE

    CHHAYA PUBLICATION|Exercise ADVANCED LEVEL NUMERICAL BANK|17 Videos
  • PREVIOUS YEARS QUESTION PAPER 2019

    CHHAYA PUBLICATION|Exercise WBCHSE 2019 PART-B|19 Videos
  • SOME p-BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise PRACTIVE SET 11|15 Videos

Similar Questions

Explore conceptually related problems

A crystal with F-centres is associated with ________ defect.

What are F-centres in an ionic crystal ?

Define the terms (i) F-centres (ii) n-type semi-conductors (iii) Ferrimagnetism.

In photoautotrophic bacteria, the reaction centre is

In pigment system II, reaction centre is

What is F-centre? Why is a solid with F-centres paramagnetic?

What is F-centre? Why is it called colour centre? What kind of defect is associated with F-centres?

Explain with suitable examples the following : (a) n-type and p-type semi-conductors (b) F-centres (c) Ferromagnetism.

In a face centred cubic cell, an atom at the face centre is shared by:

Define (a) simple or primitive unit cell (b) body-centred unit cell ( c) face-centred unit cell (d) end-centred unit cell.

CHHAYA PUBLICATION-SOLID STATE-ENTRANCE QUESTION BANK
  1. In calcium fluoride, having the fluorite structure, the coordination n...

    Text Solution

    |

  2. The ionic radii of A^(+)andB^(-) ions are 0.98xx10^(-10)m and 1.81xx10...

    Text Solution

    |

  3. Lithium has bcc structure. Its density is 530kg*m^(-3) and its atomic ...

    Text Solution

    |

  4. Which is the incorrect statement-

    Text Solution

    |

  5. Iron exhibits bcc structure at room temperature. Above 900^(@)C, it tr...

    Text Solution

    |

  6. Schottky defect is-

    Text Solution

    |

  7. CsCl has bcc arrangement. Its unit cell edge length is 400 pm. Its int...

    Text Solution

    |

  8. If Si is doped with B-

    Text Solution

    |

  9. In bcc structure contribution of corner and central atom is-

    Text Solution

    |

  10. In a solid, atom M occupies ccp lattice and 1/3rd of tetrahedral voids...

    Text Solution

    |

  11. A forms hcp lattice and B are occupying 1/3rd of tetrahedral voids, th...

    Text Solution

    |

  12. Ca^(2+)andF^(-) are located in CaF(2) crystal, respectively at face-ce...

    Text Solution

    |

  13. Addition of group-13 elements to intrinsic semiconductors result in-

    Text Solution

    |

  14. The yellow colour in NaCl crystals is due to-

    Text Solution

    |

  15. Which of the following is an amorphous solid-

    Text Solution

    |

  16. If an atom crystallises in bcc lattice with r = 4Å then the edge lengt...

    Text Solution

    |

  17. ZnO is white when cold and yellow when heated. It is due to the develo...

    Text Solution

    |

  18. A forms hcp lattice and B are occupying 1/3rd of tetrahedral voids, th...

    Text Solution

    |

  19. F-centre is-

    Text Solution

    |

  20. What colour is observed when ZnO is heated-

    Text Solution

    |