The correct statement(s) about the compound given below is(are):

The correct statement(s) concerning the structures E, F and G is(are) :

A solution of colourless salt H on boiling with excess NaOH produces a non-flammable gas. The gas evolution ceases after sometime. Upon addition of Zn dust to the same solution, the gas evolution restarts. The colourless salt(s) H is(are):

A gas described by van Der Waals equation