What would be the major product of the following reaction: $SiCl_4 \xrightarrow{\text{Excess of } H_2O}$?

Identify the incorrect statement about $SiO_2$ (silica) from the following.

The dioxides and monoxides of elements $X$ and $Y$ are amphoteric in nature. $X$ and $Y$ are respectively.

Carbon differs from other elements of the group. Which is the false statement?

$(BN)_n$ exists in

In which of the following sets are allotropes of carbon correctly matched with their uses?
$i$. graphite - crucibles
$ii$. activated charcoal - water filters
$iii$. carbon black - fuel
The correct answer is