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NEET levelSingle correct optionDifficulty 1 of 3ss077

A radius ratio $r_{+} / r_{-}$ in the range 0.414 to 0.732 corresponds to which coordination number and void?

A4, tetrahedral
B6, octahedral
C8, cubic
D3, trigonal planar

Answer: B

The ranges are 0.225-0.414 for CN 4 (tetrahedral), 0.414-0.732 for CN 6 (octahedral), and 0.732-1.0 for CN 8 (cubic).

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