Determine whether the following pairs of structures are actually different compounds or simply resonance forms of the same compounds.
(a)

(b)

(c)

(d)

(e)

(f)

(g)

(i)

(j)

and O- and and O- CH C H and CH C-H O H O-H H-C-C-H and H-C C-H H-C-NH, and H-C-NH and H-C NH CH-= CH-CH, and CH,__ CH-CH . CH-CCH CH and CH-CCH CH