能使?jié)駶櫟牡矸跭I試紙變藍(lán)的物質(zhì)是(    )

A.KBr溶液                    B.氯水                   C.碘水                    D.氯化鉀溶液

B

解析:只有氯水中的Cl2置換出I2使試紙變藍(lán)。

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