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Question: Answered & Verified by Expert
A solid XY has NaCl structure. If radius of X+ is 100 pm. What is the radius of Y- ion:
ChemistrySolid StateJEE Main
Options:
  • A 120 pm
  • B 136.6 to 241.6 pm
  • C 136.6pm
  • D 241.6pm
Solution:
2823 Upvotes Verified Answer
The correct answer is: 136.6 to 241.6 pm
For NaCl like structure. The radius ratio should be 0.414 to 0.732

r+r-=100rmax-=0.414

100rmin-=0.732

rmax-=241.6 pm 

r min =136.6pm

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