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Class 9 Exam  >  Class 9 Questions  >  An ionic compound is expected to have tetrahe... Start Learning for Free
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An ionic compound is expected to have tetrahedral structure if  - lies in the range of
  • a)
    0.414 to 0.732
  • b)
    0.732 to 1
  • c)
    0.155 to 0.225
  • d)
    0.225 to 0.414
Correct answer is option 'D'. Can you explain this answer?
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An ionic compound is expected to have tetrahedral structure if -lies i...
For tetrahedral r+ / r- lies in the range 0.225 to 0.414.
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An ionic compound is expected to have tetrahedral structure if -lies i...
Explanation:

1. Ionic Compound Structure:
Ionic compounds are formed by the transfer of electrons between a metal and a non-metal. These compounds typically have a crystalline structure where ions are arranged in a specific geometry.

2. Tetrahedral Structure:
In a tetrahedral structure, the central atom is surrounded by four other atoms or groups of atoms, forming a shape similar to a pyramid with a triangular base. This geometry is common in compounds with sp3 hybridization.

3. Calculation of Ionic Parameter (α):
The ionic parameter (α) is calculated using the formula:
α = (r+/r-) where r+ is the radius of the cation and r- is the radius of the anion.

4. Range for Tetrahedral Structure:
For an ionic compound to have a tetrahedral structure, the ionic parameter (α) should fall within the range of 0.225 to 0.414. This range corresponds to the specific geometric requirements for a tetrahedral arrangement of ions.

5. Correct Answer:
In this question, the correct answer is option 'D' (0.225 to 0.414) because this range is associated with the tetrahedral structure in ionic compounds. It indicates the ideal ratio of cationic and anionic radii for the formation of a tetrahedral geometry.
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An ionic compound is expected to have tetrahedral structure if -lies in the range ofa)0.414 to 0.732b)0.732 to 1c)0.155 to 0.225d)0.225 to 0.414Correct answer is option 'D'. Can you explain this answer?
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