With which of the given pairs does $CO_2$ resemble in terms of structure?

Which of the following is a linear molecule?

During the complete combustion of methane $CH_4$,what change in hybridisation does the carbon atom undergo?

In $Cl_2O_{6(l)} + HF \to P + Q$. If $H$ of acid $HF$ attaches with $Q$,then identify the correct option for hybridization of $Cl$ atom and $\angle OClO$ in the $P$ and $Q$ ions.

The shape of the ethylene molecule is

The percentage of $p$-character of the hybrid orbitals in graphite and diamond are respectively