Which out of `N_(2)` and `H_(2)O` is polar and why ?

Which out of H_(2)^(-) and H_(2)^(+) is more stable and why?

Between H_(2)S and H_(2)O, H_(2)O is more polar. Why?

Out of H_(2)O and H_(2)S which one has a higher thermal stability ? Why ?

Out of H_(2)O and H_(2)S which one has higher bond angle and why ?

Out of H_(2)O and H_(2)S , which one has higher bond angle and why ?

Out of H_(2)O " and " H_(2)S , which one has higher bond angle and why ?

Both CO_(2) and N_(2)O are linear. However N_(2)O is polar while CO_(2) is non-polar-explain.

D_2O is more polar than H_2O.

What are the conditions of combination of atomic orbitals? Which species out of H_(2), H_(2)^(+) and H_(2)^(-) are paramagnetic and why?