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

Options

A. `A_(2)B`
B. AB
C. `AB_(2)`
D. `AB_(4)`

Answer

c

Explanation

A - n/2

B - n

Multiplying both by 2, the formula of the solid becomes

`A^(+)` - n

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