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A binary solid A^(+)B^(-) has a structur...

A binary solid `A^(+)B^(-)` has a structure with `B^(-)` ions constituting the lattice and `A^(+)` ions occupying 25% tetrahedral holes. Formula of the solid is

A

AB

B

`A_(2)B`

C

`AB_(2)`

D

`AB_(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
`B^(-)` ions in the unit cell `=8xx(1)/(8)+6xx(1)/(2)=4`
`A^(+)` ions occupy 25% of the tetrahedral holes `=(8xx25)/(100)=2`
Thus formula is `A_(2)B_(4)orAB_(2)`
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