问题:
将一条湿润的蓝色石蕊试纸投入盛有Cl 2的集气瓶中,试纸将
A.由蓝变白
B.由蓝变紫
C.由蓝变红
D.由蓝变红又变白
将一条湿润的蓝色石蕊试纸投入盛有Cl 2的集气瓶中,试纸将
A.由蓝变白 | B.由蓝变紫 | C.由蓝变红 | D.由蓝变红又变白 |
参考答案: