$Si_3O_9^{-6}$ (having three tetrahedral units) is represented as:

$C_{60}$ contains which of the following?

The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride $(PCl_3)$ and phosphonic acid $(H_3PO_3)$ is

What products will be formed when calcium carbide reacts with nitrogen at $1000 \ ^oC$?

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

The silicate anion in the mineral kinoite is a chain of three $SiO_4$ tetrahedra,that share corners with adjacent tetrahedra. The charge of the silicate anion is