Q.

If  the close packed cations in NaCl type solid have radius of 75 pm, what would be the maximum size of anion filling the void is

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a

181.2 pm

b

102.5 pm

c

333.3 pm

d

222.6 pm

answer is A.

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Detailed Solution

For close packed NaCl type solidr+r-=0.414 - 0.732Maximum value of r--   = r+0.414=750.414=181.2 pm
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