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TS EAMCET · Chemistry · Solid State

An alloy made up of \(A\) and \(B\) metals crystallises in a cubic lattice, where \(B\) atoms occupy the corners and \(A\) atoms occupy the face centers. The formula of the alloy formed is

  1. A \(A B_3\)
  2. B \(A_3 B\)
  3. C \(A_2 B_3\)
  4. D \(A_3 B_2\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(A_3 B\)

Step-by-step Solution

Detailed explanation

In cubic lattice, \(B\) atoms occupy corners \(A\) atoms occupy face centres Contribution of each atom \((B)\) present at corner \(=1 / 8\) \(\Rightarrow \quad 8 \times \frac{1}{8}=1\) Contribution of each atom \((A)\) present at centre of face \(\frac{1}{2} \times 6=3\)