Home
Class 12
CHEMISTRY
Why does ZnO show increased electrical c...

Why does `ZnO` show increased electrical conductivity and turns yellow on heating?

A

`d-d` transition

B

`C-T` spectra

C

Higher polarisation caused by `Zn^(2+)` ion

D

`F-` centres

Text Solution

Verified by Experts

The correct Answer is:
4
`O^(-2)` ion disappear and trap `e^(-)` in place of `O^(-2)`
Promotional Banner

Topper's Solved these Questions

  • COORDINATION COMPOUNDS

    RESONANCE|Exercise Additional Problem for Self Practice (APSP) Part-IV Practice Test -2 (Section-5) (Matching Lift type )|1 Videos

  • D BLOCK ELEMENTS

    RESONANCE|Exercise EXERCISE-3 PART-III|37 Videos

Similar Questions

Explore conceptually related problems

How does electrical conductivity vary in metals with temperature?

Why does zinc oxide exhibit enhanced electrical conducity on heating ?

The electrical conductivity of pure silicon can be increased by

Which of the following shows electrical conduction ?

The electrical conductivity of pure germanium can be increased by

RESONANCE-D & F BLOCK ELEMENTS-INORGANIC CHEMISTRY(d & f- Block Elments)
  1. Which of the following ions are colourless in the aqueous solutions ?

    Text Solution

    |

  2. Which of the following factor may be regarded as the main cause of lan...

    Text Solution

    |

  3. Why does ZnO show increased electrical conductivity and turns yellow o...

    Text Solution

    |

  4. Which of the following is arranged in order of incresing melting point...

    Text Solution

    |

  5. In which of the following reaction "Philosopher's wool" is formed

    Text Solution

    |

  6. CrO3 dissolves in aqueous NaOH to give

    Text Solution

    |

  7. Mercury on heating with aqua regia gives

    Text Solution

    |

  8. The formula of azurite is :

    Text Solution

    |

  9. Oxide of metal cation which is not amphoteric ?

    Text Solution

    |

  10. The ratio of mass of a diamagnetic substance in a magnetic field to it...

    Text Solution

    |

  11. CrO(4)^(2-) (yellow) changes to Cr(2)O(7)^(2-)(orange ) in pH=y . Henc...

    Text Solution

    |

  12. An excess of Na(2)S(2)OO(3) react with aqueous CuSO(4) to give

    Text Solution

    |

  13. [Cr(H2 O)6]Cl3 (at no. of Cr = 24) has a magnetic moment of 3.83 B.M. ...

    Text Solution

    |

  14. Potassium manganate (K2MnO4) is formed when

    Text Solution

    |

  15. Uub is the symbol for the element with atomic number-

    Text Solution

    |

  16. Which of the following species has O-O bond?

    Text Solution

    |

  17. FeCr(2)O(4)( chromite ) is converted to Cr by following steps : Chro...

    Text Solution

    |

  18. When the same amount of zinc is treated separately with excess of sulp...

    Text Solution

    |

  19. Both [Ni(CO)4] and [Ni (CN)4]^(2-) are diamagnetic The hybridisation...

    Text Solution

    |

  20. Spin - only magnetic moment of [Co(NH(3))(3)(H(2)O)(3)]Cl(3)( in Bohr ...

    Text Solution

    |