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  • Need explanation for: In rock salt structure Cl- arrange in CCP manner and Na+ present in all octahedral voids, If radius of Na+ ion is 150 pm then radius of Cl- is

In rock salt structure Cl- arrange in CCP manner and Na+ present in all octahedral voids, If radius of Na+ ion is 150 pm then radius of Cl- is

  • Option 1)

    150 pm

  • Option 2)

    362 pm

  • Option 3)

    132 pm

  • Option 4)

    263 pm

 

Answers (1)

\frac{radius\; of\; octahedral\; void}{radius\; of \; atom}=0.414

radius\; of\; atom=\frac{150}{0.414}=362.3pm

 

Octahedral void -

Void form by touching 6 spheres. 4 atoms in same plane , 1 atom in upper plane and 1 in lower plane.

\frac{r}{R} = 0.414

- wherein

r = radius of void

 

R = radius of atom

 

 


Option 1)

150 pm

This is incorrect

Option 2)

362 pm

This is correct

Option 3)

132 pm

This is incorrect

Option 4)

263 pm

This is incorrect

Posted by

Vakul

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