Question
Element 'B' forms ccp structure and 'A' 'occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is :
BITSAT
Chemistry
Solid State
2021
BITSAT 2021
BITSAT Chemistry Question (2021) — Solution
Options
- A. A _ 2 BO _ 4
- B. AB _ 2 O _ 4
- C. A _ 2 ~B _ 2 O
- D. A _ 4 ~B _ 2 O
Answer
B. AB _ 2 O _ 4
Step-by-step solution
No. of lattice points = No. of octahedral voids = 1 2 No. of tetrahedral voids in c c p structure No. of atoms of B=4 No. of atoms of A= 1 2 No. of octahedral voids = 1 2 4=2 No. of atoms of O= All tetrahedral voids =2 No. of lattice points =2 4=8 Hence, A: B: O=1: 2: 4 Therefore, the formula of the compound is A B_ 2 O_ 4
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