MCQ
Bucky ball or Buckminster fullerene is:
- Ait has $sp ^2$-hybridised nature and resembles with a soccer ball
- Ban allotrope of carbon
- Cit is referred as C-60
- DAll of these
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$\mathrm{Eu}^{3+}, \mathrm{Lu}^{3+}, \mathrm{Nd}^{3+}, \mathrm{La}^{3+}, \mathrm{Sm}^{3+}$