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第 21: 21在酸性溶液中,当适量的KMnO4与Na2SO3反应时出现的现象是 ( )

单选题
2021-09-06 20:45
A、棕色沉淀
B、紫色褪去
C、绿色溶液
D、都不对
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正确答案
B

试题解析

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