Home
Class 12
CHEMISTRY
In corrundum, oxid ions are arranged in ...

In corrundum, oxid ions are arranged in `h.c.p.` array and the aluminum ions occupy two`-`thirds of octahedral voids. What is the formula of currundum ?

A

`Al_(2) O_(3)`

B

`AL_(2)O_(4)`

C

`Al_(2)O_(2)`

D

`AlO_(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2019

    TARGET PUBLICATION|Exercise MCQs|48 Videos

  • SOLUTIONS AND COLLIGATIVE PROPERTIES

    TARGET PUBLICATION|Exercise Evaluation Test|25 Videos

Similar Questions

Explore conceptually related problems

(i) In corundum, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two third of octahedral voids. What is the formula of corundum ? (ii) The unit cell of silver iodide (Agl) has 4 iodine atoms in it. How many silver atoms must be there in the unit cell ?

In corundum, oxide ions are arranged in hexagonal close packing and aluminium ionsa occpy tow-third of the octaheral voids. What is the formula of corrundum ? .

In sapphire, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two-thirds of the octahedral voids. What is the formula of sapphire?

In a metal oxide , the oxide ions are arranged in hexagonal close packing and metal lone occupy two - third of the ocishedral voids .The formula of the oxide is

In a crystalline solid, anions B arranged in ccp lattice and cations A occupy 50% of the octahedral voids. And 50% of the tetrahedral voids. What is the formula of the solid?

TARGET PUBLICATION-SOLID STATE-QUESTION
  1. What is the simplest formula of a solid whose unit cell has the atom A...

    Text Solution

    |

  2. An alloy of copper and gold crystallizes in cubic lattic, in which the...

    Text Solution

    |

  3. In corrundum, oxid ions are arranged in h.c.p. array and the aluminum ...

    Text Solution

    |

  4. In a solid ,oxide (O^(2-)) ions are arranged in ccp, cations (A^(3+)...

    Text Solution

    |

  5. Interstitial hole is called tetrahedral because:

    Text Solution

    |

  6. The strcture of MgO is similar to NaCl. What is the co- ordination ...

    Text Solution

    |

  7. In the crystal of CsCl ,the nearest neighbours of each Cs ion are :

    Text Solution

    |

  8. In CsCl the number of formula units per unit cell is

    Text Solution

    |

  9. The unit cell cube length for LiCl(just like NaCl structures) is 5.14Å...

    Text Solution

    |

  10. Edge length of NaCl unti cell is 562 pm. Then:

    Text Solution

    |

  11. KCl crystallises in the same type of lattice as does NaCl. Given that ...

    Text Solution

    |

  12. In A^(+)B^(-) ions compound, radii of A^(+) and B^(-) ions are 180...

    Text Solution

    |

  13. Frenkel defect is caused due to

    Text Solution

    |

  14. Badn theory of metals is based on .

    Text Solution

    |

  15. Which of the following statements is TRUE ?

    Text Solution

    |

  16. When suitable impurity is added to pure intrinsic semiconductor ...

    Text Solution

    |

  17. Silicon doped with arsenic is an example of :

    Text Solution

    |

  18. Which of the following statements is TRUE ?

    Text Solution

    |

  19. Which of the following represents ferromagnetism ?

    Text Solution

    |

  20. Which of the following is NOT ferromagnetic in nature ?

    Text Solution

    |