MCQ
The hardest substance amongst the following is
- A$B{e_2}C$
- BGraphite
- CTitanium
- ✓${B_4}C$
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$\mathrm{HF}, \mathrm{H}_2 \mathrm{O}, \mathrm{SO}_2, \mathrm{H}_2, \mathrm{CO}_2, \mathrm{CH}_4, \mathrm{NH}_3, \mathrm{HCl}, \mathrm{CHCl}_3, \mathrm{BF}_3$
$C{H_2} = C{H_2}\xrightarrow{{HBr}}X\xrightarrow[{{I_2}(excess)}]{\begin{subarray}{l}
Hydrolisis \\
N{a_2}C{O_3}
\end{subarray} }Z$