Q. An ionic compound is expected to have tetrahedral structure if $r_{+}/r_{-}$ lies in the range of

A) 0.414 to 0.732
B) 0.225 to 0.414
C) 0.155 to 0.225
D) 0.732 to 1
Explanation

(b)
[table] Radius ratio$\mathbf{(}\mathbf{r}_{\mathbf{+}}\mathbf{/}\mathbf{r}_{\mathbf{-}}\mathbf{)}$ | Structure ; $< 0.155$ | linear ; $0.155 - 0.225$ | planar triangular ; $0.225 - 0.414$ | tetrahedral ; $0.414 - 0732$ | octahedral ; $0.732 - 1$ | bcc [/table]

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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