Which acid is not an arrhenius acid
$HNO_3$
$HClO_4$
$H_3BO_3$
$H_3PO_4$
Give origin of group $13$ elements
Hydrogen gas will not reduce
The Lewis acid nature of $BX_3$ follows the order
Borax has the molecular formula
Below are two statements, one labeled as Assertion $(A)$ and the other as Reason $(R):$
Assertion $(A)$: Among group $13$ elements, boron's melting point is unusually high $(2453 \mathrm{~K})$.
Reason $(R):$ Solid boron has a strong crystalline lattice.
In the context of the above statements, choose the correct answer from the following options: