Alkali metals readily react with oxyacids forming corresponding salts like M_(2)CO_(3),MHCO_(3),MNO_(3),M_(2)SO_(4) etc. with evolution of hydrogen. The also dissolve in liquid NH_(3) but without the evolution of hydrogen. The colour of its dilute solution is blue but when it is heated and concentrated then is colour becomes bronze. Which metal bicarbonate does not exist in solid state? {:(,(P),LiHCO_(3)," ",(Q),Ca(HCO_(3))_(2)),(,(R),Zn(HCO_(3))_(2)," ",(S),NaHCO_(3)),(,(T),AgHCO_(3)," ",,):}