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A salt AB cystallises in the CsCl struct...

A salt AB cystallises in the CsCl structure. The anions at the corners and the cation in the centre. Hence, radius ratio `r_(+)//r_(-)`

A

0.225

B

0.441

C

0.625

D

0.732

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • AX,AY,BX , and BY have rock salt type structure with following internuclear distances: |{:("Salt","Anion-anion","Cation-anion"),(,"distance in"Å,"distance in"Å),(AX,2.40,1.70),(AY,1.63,1.15),(BX,2.66,1.88),(By,2.09,1.48):}| A salt MY crystallizes in the CsCl structure. The anions at the corners touch each other and cation is in the centre. The radius ratio (r_(o+)//r_(Θ)) for this structure is

    A
    `0.225`
    B
    `0.414`
    C
    `0.732`
    D
    `1.0`

  • At the limiting value of radius ratio r_(+)//r_(-)

    A
    Forces of attraction are larger than the forces of repulsion
    B
    Forces of attraction are smaller than the forces of repulsion
    C
    Forces of attraction andrepulsion are just equal
    D
    None of these

  • At the limiting value of radius ratio r_+//r_- ,

    A
    forces of attraction are larger than the forces of repulsion
    B
    forces of attraction are smaller than the forces of repulsion
    C
    forces of attraction and repulsion are just equal
    D
    none of these.

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