In a face centred cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centres. Once of the A atom is missing from one corner in unit cell. The simplest formula of compound isA. `A_7B_3`B. `AB_3`C. `A_7B_24`D. `A_(7//8)B_3`

In a face centred cubic arrangement of A and B atoms whose A atoms are

1.	In a face centred cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centres. Once of the A atom is missing from one corner in unit cell. The simplest formula of compound isA. `A_7B_3`B. `AB_3`C. `A_7B_24`D. `A_(7//8)B_3`
Answer» Correct Answer - C Number of atoms of A from corners of unit cell `=1-1/8=7/8` Number of atoms of B from faces of unit cell = 3 Thus , A : B :: 7/8 : 3 or 7 : 24 . Thus , formula is `A_7B_24` .

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In a face centred cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centres. Once of the A atom is missing from one corner in unit cell. The simplest formula of compound isA. `A_7B_3`B. `AB_3`C. `A_7B_24`D. `A_(7//8)B_3`

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