Home
Class 12
CHEMISTRY
Lithium selenide can be described as a c...

Lithium selenide can be described as a cubic closest-packed array of selenide ions with lithium ions in all of the tetrahedral holes. Formula of lithium selenide is 

A

`Li_(2)Se`

B

`LiSe`

C

`LiSe_(2)`

D

`Li_(3)Se`

Text Solution

Verified by Experts

The correct Answer is:
A
Se- CCP say
For CCP, Z =4, so `Se_(4)`

*Li. occupies all tetrahedral voids, i.e. = 8 , `Li-(8)Se_(4) = Li_(2)Se`
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    AAKASH SERIES|Exercise PRACTICE SHEET - 2|30 Videos

  • SOLID STATE

    AAKASH SERIES|Exercise PRACTICE SHEET - 3|30 Videos

  • SOLID STATE

    AAKASH SERIES|Exercise LEVEL - II LECTURE SHEET (EXERCISE - IV)|4 Videos

  • REVISION EXERCISE

    AAKASH SERIES|Exercise COMPLEX COMPOUNDS|47 Videos

  • SOLIDS STATE

    AAKASH SERIES|Exercise PRACTICE EXERCISE|63 Videos

Similar Questions

Explore conceptually related problems

A metal oxide crystallises in a hexagonal close-packed array of oxide ions with two out of every three octahedral holes occupied by metal ions. The formula of metal oxide is

Ferric oxide crystallizes in a hexagonal close - packed array of oxide ions with two of every three octahedral holes occupied by ferric ions . Derive the formula of ferric oxide .

AgI crystallises in the cubic close-packed zinc blend structure. Assuming that the iodide ions occupy the lattice points, fraction of the tetrahedral sites occupies by sliver ions are

Structure of a mixed oxide is cubic close-packed (ccp). The unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is

In a hypothetical ionic crystal, B is arranged in cubic close packing and A occupies all octahedral voids and alternative tetrahedral voids. The correct formula of the compound

A spinel is an important class of oxides consising of two types of metal ions with the oxide ions arranged in cop layers. The normal spinel has one-eigth of the tetrahedral holes occupied by one type of metal ion and one-half of the octahedral holes occupied by another type of metal ion. Such a spinel is formed by Mg^(2+), A^(2+) and O^(2-) . The neutratrality of the crystal is maintained. The formula of the spinel is

Following is the fact about the newly discovered superconductor of C_(60) (fullerene). The alkali metal fulleride superconductor M_(3)C_(60) has a cubic closest-packed (face-centered cubic) arragement of nearly spherical C_(60)^(3-) anions with M^(+) cations in the holes between the larger C_(60)^(3-) ions. The holes are of two types-octahedral holes, which are surrounded octahedrally by six C_(60)^(3-) ions, and tetrahedral holes, which are surrounded tetrahedrally by four C_(60)^(3-) ions. How many C_(60)^(3-) ions, octahedral holes, and tetrahedral holes are present per unit cell

In a cubic closed packed structure of mixed oxide, the oxide ions are in CCP arrangement 1/6 of tetrahedral voids are occupied by cations A and 1/2 of octahedral voids are occupied by cations B. The formula of the oxide is

Following is the fact about the newly discovered superconductor of C_(60) (fullerene). The alkali metal fulleride superconductor M_(3)C_(60) has a cubic closest-packed (face-centered cubic) arragement of nearly spherical C_(60)^(3-) anions with M^(+) cations in the holes between the larger C_(60)^(3-) ions. The holes are of two types-octahedral holes, which are surrounded octahedrally by six C_(60)^(3-) ions, and tetrahedral holes, which are surrounded tetrahedrally by four C_(60)^(3-) ions. Specify fractional coordinates for the tetrahedral holes (Fractional coordinates are fractions of the unit cell edge lengths. For example, a hole at the centre of the cell has fractional coordinates (1)/(2),(1)/(2),(1)/(2)

(A) : Lithium has less electrode potential than caesium (R) : Hydration energy of lithium ion is high.

AAKASH SERIES-SOLID STATE-PRACTICE SHEET - 1
  1. Hexagonal closest packed structure and cubic closest packed structure ...

    Text Solution

    |

  2. Which of the following figure represent the cross section of an octahe...

    Text Solution

    |

  3. Lithium selenide can be described as a cubic closest-packed array of s...

    Text Solution

    |

  4. In the closest packing of atom A, the radius of atom B that can be fit...

    Text Solution

    |

  5. An alloy of Au and Cu crystallises with atoms of an occupying all latt...

    Text Solution

    |

  6. A certain oxide of metal M crystallises in such a way that O^(2-) ions...

    Text Solution

    |

  7. Each rubidium halide crystallising in the RbCl type lattice has a unit...

    Text Solution

    |

  8. Which of the following are not the characteristics of crystalline soli...

    Text Solution

    |

  9. Glasses and plastics are

    Text Solution

    |

  10. If the three interaxial angles defining the unit cell are all equal in...

    Text Solution

    |

  11. Which of the following statements are correct?

    Text Solution

    |

  12. Which of the following statment(s) is (are) correct?

    Text Solution

    |

  13. In the unit cell of NaCl, which of the following statements are correc...

    Text Solution

    |

  14. Packing refers to the arrangement of constituent units in such a way t...

    Text Solution

    |

  15. In a close packed lattice containing 'n' particles, the number of tetr...

    Text Solution

    |

  16. Packing refers to the arrangement of constituent units in such a way t...

    Text Solution

    |

  17. Following is the fact about the newly discovered superconductor of C(6...

    Text Solution

    |

  18. Following is the fact about the newly discovered superconductor of C(6...

    Text Solution

    |

  19. The ionic radii of Na^(+), K^(+) and Rb^(+) are 97, 133 and 147 pm, re...

    Text Solution

    |

  20. Match the nature of bonding mentioned in list I with the solids in lis...

    Text Solution

    |