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MHT CET202314 May 2023Morning ShiftChemistrySolid StateActual

In an ionic crystalline solid, atoms of element Y forms hep structure. The atoms of element X occupy one third of tetrahedral voids. What is the formula of compound?

Options

  1. AX ₂ Y ₃
  2. BX Y
  3. CX ₃ Y ₃
  4. DXY ₂

Correct answer

A. X ₂ Y ₃

Step-by-step solution

The atoms of element Y form hcp structure. The number of tetrahedral voids generated is twice the number of Y atoms. Thus, number of tetrahedral voids =2 Y The atoms of element X occupy (1/3) of these tetrahedral voids. Hence, number of X atoms =2 Y 1 / 3=2 / 3 Y Ratio of X and Y atoms =2 / 3 Y : 1 Y =2 / 3: 1=2: 3 Formula of compound = X ₂ Y ₃

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