The name of $K_2CS_3$ is potassium ............... .

Which one of the following molecules contains both ionic and covalent bonds?

Which of the following orders is $CORRECT$?

Amongst the following,the total number of species $NOT$ having $8$ electrons around the central atom in its outermost shell is $NH_3$,$AlCl_3$,$BeCl_2$,$CCl_4$,$PCl_5$:

The number of sigma $(\sigma)$ and pi $(\pi)$ bonds in peroxodisulphuric acid are, respectively:

Arrange the following molecules according to the decreasing order of their $O-O$ bond lengths.