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AP EAMCET · Chemistry · Solid State

In a mixed oxide of \(A\) and \(B, A\) occupies all the octahedral voids while \(B\) occupies \((2 / 3)^{\text {rd }}\) the tetrahedral voids. The molecular formula of this oxide is

  1. A \(\mathrm{A}_3 \mathrm{~B}_4 \mathrm{O}_3\)
  2. B \(\mathrm{A}_3 \mathrm{~B}_2 \mathrm{O}_3\)
  3. C \(\mathrm{A}_3 \mathrm{BO}_3\)
  4. D \(A B_2 \mathrm{O}_3\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\mathrm{A}_3 \mathrm{~B}_4 \mathrm{O}_3\)

Step-by-step Solution

Detailed explanation

According to mixed oxide, number of \(\mathrm{O}^{2-}\) ions \(=4\) So, number of tetrahedral voids \(=8\) and number of octahedral voids \(=4\) \(B\) occupies 2/3rd of tetrahedral void \(=8 \times \frac{2}{3}=16 / 3\) \(A\) occupies all octahedral voids \(=4\) Now,…
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