MCQ
The hardest substance amongst the following is
- A$B{e_2}C$
- BGraphite
- CTitanium
- ✓${B_4}C$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$n = 3, l = 1, m_l = 0$
$[IMAGE]\,\,\xrightarrow{{{C_2}{H_5}OH/\Delta }}$