List of top Physical Chemistry Questions on Point groups and character tables

The point group of \(\mathrm{CH_2=C=CH_2}\) is

The total number of symmetry operations (order, \(h\)) present in the point group of \([\mathrm{PdCl_6}]^{2-}\) is \(x\) and that in trans-\([\mathrm{PdBr_2Cl_4}]^{2-}\) is \(y\). The value of \(x-y\) is (in integer).