InterviewSolution
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InterviewSolution
| 1. |
following is the fact about the newly discover superconductor fo `C_(60)` (fullerence).the alkali mental fulleride superconductor `M_(3)C_(60)` has a cubic closesr - packed (face0centered cubic) arrangement of nearly spherical `C_(2-)^(60)` anions with `M^(+)` cations in the holes between the larger `C_(3-)^(60)` ions, the holes are of two types - octahedral hoels , which are surrounded octachedral by six `C_(3-)^(60)` ions. tetarahedral holes , which are surrounded tetrahedrally by for `C_(3-) ^(60)` ions . the ionic radii of `Na^(+), K^(+) and Rb^(+)` are 97 , 133 and 147 pm , respectivley . which of these ions will fit into the octanhedrral holes ? (radius of `C_(3-)^(60)` is about 350 pm )A. `Na^(+)`B. `K^(+)`C. `Rb^(+)`D. all of these |
| Answer» Correct Answer - C | |