The hardest substance among the following is:

B e_{2} C

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Graphite

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Titanium

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S i C

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Solution

The correct option is C Titanium
$\begin{matrix} A) {B e}_{2} C - Ionic B) Graphite - Molecule or compornd C) Titanium - Metal D) SiC - Ionic \end{matrix}$
$\begin{matrix} hardest - metallic > covalent> Ionic > molecular compound \end{matrix}$
$Correct answer -C$

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