In a solid 'AB' having NaCl structure , 'A' atoms occupy the corners of the cubic unit cell. If cell the face-centred atoms along one of the axes are removed , then the resultant stoichiometry of the solid is

In a solid 'AB' having NaCl structure , 'A' atoms occupy the corners o

1.	In a solid 'AB' having NaCl structure , 'A' atoms occupy the corners of the cubic unit cell. If cell the face-centred atoms along one of the axes are removed , then the resultant stoichiometry of the solid is
Answer» `AB_2` `A_2B` `A_4B_3` `A_3B_4` Solution :There were 6 A atoms on the face centres. REMOVING face-centred atoms one of the AXES means removal of 2A atoms. Now, no of A atoms per unit cell `{:(=8xx1/8,4xx1/2,=3),("(Corners)","(face-centred)",):}` No.of B atoms per unit cell `{:(=12xx1/4,1,=4),("(edge centred)","(body-centred)",):}` HENCE, the resultant stoichoimetry is `A_3B_4`