MCQ
In Mendeleev table, the triad of $\ce{VIII}$ group is :
- ✓$\ce{Ru, Rh, Pd}$
- B$\ce{Cu, Ag, Au}$
- C$\ce{N, O, F}$
- D$\ce{Tl, Pb, Bi}$
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Reason : Transparent bead $(NaBO_2 + B_2O_3)$ forms coloured bead with coloured cation.
$(R= 8.314\,\,JK^{-1}\,\,mol^{-1};\,\,ln\,2 = 0.693;\,\,ln\,3 = 1.098)$