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The positions of Cl^(-) ions in NaCl str...

The positions of `Cl^(-)` ions in NaCl structure are

A

Corners of the cube

B

Centres of faces of the cube

C

Corners as well as face centres of the cube

D

Edge centres of the cube

Text Solution

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The correct Answer is:
C
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Srinu : I know the size of Na^(+) ion is less than 'Na' atom In this way . The size of Cl^(-) ion is also less than Cl atom . DO you argree with sriunu ? Justify your answer .

Rocksalt structure consists of FCC arrangment of Cl^(-) ions in which Na^(+) inos occupy all the Octahedral vois. Each unit cell consists of four Na^(+) ions and four Cl^(-) ions effectively. How many tetrahedral voids are kept unocupied in one unit cell of rocksalt ?

Knowledge Check

  • The coordination number of Cl^(-) ion in CsCl crystal is

    A
    4
    B
    6
    C
    8
    D
    12

  • Rocksalt structure consists of FCC arrangment of Cl^(-) ions in which Na^(+) inos occupy all the Octahedral vois. Each unit cell consists of four Na^(+) ions and four Cl^(-) ions effectively. How many nearest Cl^(- ) inons are present around each Cl^(-) in the lattice ?

    A
    4
    B
    6
    C
    8
    D
    12

  • Rocksalt structure consists of FCC arrangment of Cl^(-) ions in which Na^(+) inos occupy all the Octahedral vois. Each unit cell consists of four Na^(+) ions and four Cl^(-) ions effectively. Which layer of Clions is not present ( Na^(+) not shown)

    A
    B
    C
    D

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    NaCl is fcc lattice , where Na^+ ions are at corner and face centre position . Chloride ions are at edge centres and body centre positions. How many NaCl formula units will be in an unit cell ?

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    What is the crystal structure of NaCl ?

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