Which of the following statements about boron | vedclass

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(C) Boron carbide $(B_4C)$ is an extremely hard ceramic material used in tank armor,bulletproof vests,and engine sabotage powders,and it is commonly k

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It is the hardest substance

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(C) Boron carbide $(B_4C)$ is an extremely hard ceramic material used in tank armor,bulletproof vests,and engine sabotage powders,and it is commonly known as Norbia.While boron carbide is very hard,it is not the hardest substance known; diamond is significantly harder.Silicon carbide is often used for cutting and grinding due to its durability and cost-effectiveness,whereas boron carbide is typically used for specialized armor applications.Therefore,the statement that it is the hardest substance is incorrect.

Column-$1$ (Reaction)	Column-$2$ (Main product)
$A$. $B_2H_6 + 2CO \longrightarrow$	$I$. $B_2O_3$
$B$. $B_2H_6 + 3O_2 \longrightarrow$	$II$. $2BH_3 \cdot CO$
$C$. $B_2H_6 + 6H_2O \longrightarrow$	$III$. $2H_3BO_3$

Which of the following statements about boron carbide is wrong?

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