Home
Class 12
CHEMISTRY
Why is zinc oxide white at low temperatu...

Why is zinc oxide white at low temperature and yellow at high temperature?

Promotional Banner

Topper's Solved these Questions

  • The p-BLOCK ELEMENTS

    V PUBLICATION|Exercise QUESTION BANK|147 Videos

Similar Questions

Explore conceptually related problems

A reaction, 'A+B rarr C+D+q' is found to have a positive entropy change. The reaction will be i) possible at high temperature ii) possible oniy at low temperature iii) not possible at any temperature iv) possible at any .temperature.

Why is N_2 less reactive at room temperature?

Why Li_2CO_3 decomposes at lower temperature whereas Na_2CO_3 at higher temperature?

Li_2CO_3 decomposes at a lower temperature whereas Na_2CO_3 at higher temperature.why?

V PUBLICATION-THE SOLID STATE-QUESTION BANK
  1. Derive packing efficiency of ccp and hcp structure

    Text Solution

    |

  2. Give the reason behind the following. i) The glass window pannels of...

    Text Solution

    |

  3. Why is zinc oxide white at low temperature and yellow at high tempera...

    Text Solution

    |

  4. Based on the dimensions of unit cells, crystal can be classified into ...

    Text Solution

    |

  5. The unit cell dimension of a particular crystal system is a=b=c, alpha...

    Text Solution

    |

  6. a. NaCl does not exhibit Frenkel. Defect. Do you agree? Justify. b: A...

    Text Solution

    |

  7. Give reasons for the following: Copper is conducting as such while cop...

    Text Solution

    |

  8. Why is potassiumchloride sometimes violet instead of pure white?

    Text Solution

    |

  9. Schottky and frenkel defects are stoichiometric defects. When pure NaC...

    Text Solution

    |

  10. Though glass and quartz are both made up of SiO4 they differ structura...

    Text Solution

    |

  11. Classify the following solids as ionic, metallic, molecular, network (...

    Text Solution

    |

  12. A solid substance 'A B' has a rock salt geometry What is the coordina...

    Text Solution

    |

  13. Do all the metals possesș a close packed structure? Name the differen...

    Text Solution

    |

  14. Why are amorphous solids are considered as super cooled liquids?

    Text Solution

    |

  15. ZnO appears yellow on heating.

    Text Solution

    |

  16. The defects of crystalline solids are called thremodynamics defects. W...

    Text Solution

    |

  17. Why is Frenkel defect not found in alkali metal halides?

    Text Solution

    |

  18. CaCl2 will introduce Schottky defect, if added to AgCl crystal. Explai...

    Text Solution

    |

  19. The ions of NaF and MgO have the same number of electrons and internuc...

    Text Solution

    |

  20. MgO', has the structure of 'NaCl ' and TiCl has the structure of 'Cs C...

    Text Solution

    |