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MHT CET202012 Oct 2020Morning ShiftChemistrySolid StateActual

What is the value of radius ratio of ionic crystal having coordination number six?

Options

  1. AGreater than 0.732
  2. BIn between 0.414 to 0.732
  3. CIn between 0 225 to 0 414
  4. DLess than 0.225

Correct answer

B. In between 0.414 to 0.732

Step-by-step solution

Correct answer is in between 0.414 and 0.732 Since the general formula is AX with coordination number 6 , the crystal could be considered as NaCl . Thus, it is evident that the ratio lies between 0.414 and 0.732 because of its octahedral structure. The value ranging between 0.414 and 0.732 is obtained by dividing the radius of positive ion by that of negative ion.

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