For an ionic crystal of the general formula A^+B^- and co-ordination number 6, the radius ratio will be:

JEE Main Chemistry question

Not in JEE Main or NEET syllabus

For an ionic crystal of the general formula and co-ordination number 6, the radius ratio will be:

(A)Greater than 0.73
(B)Between 0.73 and 0.41Correct
(C)Between 0.41 and 0.22
(D)Less than 0.22

Answer: (B)

Solution

The radius-ratio rule places octahedral coordination (CN = 6) in the range : below the structure switches to tetrahedral (CN = 4), and above it switches to cubic (CN = 8). This matches

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Question ID VK-141708