Tetrahalides of group $14$ elements (except that of carbon) act as

The chloride that $can \ not$ get hydrolysed is

Which of the allotropic forms of carbon is aromatic in nature?

$Si$ reacts with $CH_3Cl$ at $573 \ K$ in the presence of $Cu$ powder to form methyl substituted chlorosilanes. Among the given methyl substituted chlorosilanes, whose yield is minimum?

Which of the following allotropes of carbon is isomorphous with crystalline silicon?

Given below are two statements:
Statement $I$ : $SiO_2$ and $GeO_2$ are acidic while $SnO$ and $PbO$ are amphoteric in nature.
Statement $II$ : Allotropic forms of carbon are due to property of catenation and $p \pi-d \pi$ bond formation.
In the light of the above statements,choose the most appropriate answer from the options given below: