Select the true statement about copper and its compounds:
A、
cupricsulfateispartofFehlingreagentforproofofreducingpropertiesoforganiccompounds(例如monosaccharides),accordingtothefollowingreaction:Cu2++e→Cu+
B、
manycopper(II)compoundsarewatersolubletoformbluesolutions
C、
thecopperatomsincompoundshaveoxidationnumbersIandII
D、
thecompoundCuSO4·5H2Oisalsocalledbluevitriol
发布时间：2025-10-14 01:56:00
