Complete hydrolysis of xenon hexafluoride gives HF along with compound $X$. The hybridisation in $X$ is

$\mathrm{KMnO}_4$ oxidises hydrogen sulphide in acidic medium, The number of moles of $\mathrm{KMnO}_4$ which react with one mole of hydrogen sulphide is

Identify the set which does not have ambidentate ligand(s)

The number of linear and crosslinked polymers in the following respectively are

Novolac, Nylon 6,6, Bakelite, PVC, melamine