$C_{60}$ contains:

Which species does not exist?

The most basic oxide of elements in group $14$ of the periodic table is

The bleaching action of bleaching powder is due to the liberation of

An inorganic compound $(A)$ made of the two most abundant elements in the Earth's crust is used in building construction. When $(A)$ reacts with carbon,it forms a poisonous gas $(B)$,which is a very stable diatomic molecule. Identify compounds $(A)$ and $(B)$.

Name the type of silicate structure in which one oxygen atom of $SiO_4^{4-}$ is shared with another silicate unit.