(1)在常温下若甲是固体,乙为无色液体,则x是______.
(2)在常温下若乙为气体,则x为______.
(3)在常温下若X是固体,Y是气体,则Y是______.
(4)若乙的溶液是浅绿色,y是红色固体,则x为______.