In $CCl_4$,the four valencies of carbon are directed towards the four corners of which of the following?

What is the meaning of hybridization of atomic orbitals?

The carbon atoms in an acetylene molecule are in which state of hybridisation?

The hybridization in sulphur dioxide is

Sulphur reacts with chlorine in $1:2$ ratio and forms $X$. Hydrolysis of $X$ gives a sulphur compound $Y$. What is the structure and hybridisation of the anion of $Y$?

In which of the following molecular shapes must the $d_{z^2}$ orbital not be involved in bonding?