Which of the following compounds is $NOT$ acidic in nature?

$FeS_2$ is

Which fibrous mineral substance can withstand red-hot temperatures without being damaged?

The number of six-membered carbon rings and five-membered carbon rings present in Buckminsterfullerene are $x$ and $y$ respectively. The sum of $x$ and $y$ is:

$P_4O_{10}$ is not used to dry $NH_3$ gas because:

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{P}_4 + H_2O \longrightarrow$ No reaction