Solid State - Result Question 16

####16. The arrangement of Xions around A+ion in solid AX is given in the figure (not drawn to scale). If the radius of Xis 250pm, the radius of A+is

(2013 Adv.)

(a) 104pm

(b) 125pm

(c) 183pm

(d) 57pm

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Answer:

Correct Answer: 16. (a)

Solution:

  1. PLAN Given arrangement represents octahedral void and for this

r+(cation) r(anion) =0.414 r(A+)r(X)=0.414 r(A+)=0.414×r(X)=0.414×250pm =103.5pm104pm



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