Home
Class 12
CHEMISTRY
ZnO is white cold and yellow when heated...

`ZnO` is white cold and yellow when heated, it is due to the development of

A

Frenkel defect

B

Metal defect

C

Schonttky defect

D

Metal deficiency defect

Text Solution

Verified by Experts

The correct Answer is:
b
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    A2Z|Exercise Assertion - Reasoning Questions|7 Videos

  • SOLID STATE

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

  • SOLID STATE

    A2Z|Exercise AIPMT/NEET Questions|23 Videos

  • P BLOCK ELEMENTS ( GROUP 15,16,17,18)

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

  • SOLUTIONS

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

Similar Questions

Explore conceptually related problems

In an ideal crystal, the entropy of the constituents at absolute zero temperature (0K) is zero. However, the crystals generally suffer from certain defects also called imperfections They may be both electronic and atomic in nature. The atomic imperfections may be stoichiometric (Schottky and Frenkel defects) or non-stoichiometric (metal excees and metal deficiency defects). In addition to these, there are impurity defects which are caused by the addition of certain impurities of metals and this is known as dopping. The dopping leads to semi conductors which may be either n-type or p-type in nature. Zinc oxide (ZnO) is white when cold and yellow when hot. It is due to the development of :

Assertion : ZnO becomes yellow when it is beated Reason: NaCI becomes yellow when heater in the presence of Na vapours due to anion vacancy

ZnO shows yellow colour on heating due to

A2Z-SOLID STATE-AIIMS Questions
  1. The solid NaCI is a bad conductoe of electricty since

    Text Solution

    |

  2. In graphics carbon atoms are joined togather due to

    Text Solution

    |

  3. Example of unit cell with crystallographic dimension a != b != c, alph...

    Text Solution

    |

  4. If Z is the number of atoms in the unit cell that represent the closed...

    Text Solution

    |

  5. An AB(2) type structure is found in

    Text Solution

    |

  6. An example of a body cube is

    Text Solution

    |

  7. In a face centered cubic cell , an the face contributes in the unit ce...

    Text Solution

    |

  8. Sodium metal crystallises in body centred cubic lattic with cell edge ...

    Text Solution

    |

  9. Potassium has a bcc structure with nearest neighour distance 4.52 Åits...

    Text Solution

    |

  10. The coordination number of each atom in body centered cubic unit cell...

    Text Solution

    |

  11. Find the coordination of Na^(o+) in Na(2)O.

    Text Solution

    |

  12. In a solid lattice the cation has left a lattice sirte and is located ...

    Text Solution

    |

  13. An element (atomic mass = 100 g//mol) having bcc structure has unit ce...

    Text Solution

    |

  14. If the pressure on a NaCI structure in increases , then its coordinati...

    Text Solution

    |

  15. The edge length of a cube is 400 pm .its body diagonal would be

    Text Solution

    |

  16. In closest packing of A type of atoms (radius r(A)) the radius of atom...

    Text Solution

    |

  17. Potassium has a bcc structure with nearest neighour distance 4.52 Åits...

    Text Solution

    |

  18. Ferrous oxide has cubes structure and each edge of the unit cell is 5....

    Text Solution

    |

  19. ZnO is white cold and yellow when heated, it is due to the development...

    Text Solution

    |

  20. f-centre is

    Text Solution

    |