Choose the correct statement(s) out of the following
(A) effloresence means the property of spontaneously giving water of crystallisation to the atmosphere.
(B) an oxide which forms salts when it reacts with both acids and alkalies is a neutral oxide.
(C) CO2 when passes through a clear lime water solution , it turns milky.
(D) aqueous solution of all the salts are are neutral in nature.