[题目]下列物质能使干燥的蓝色石蕊试纸先变红后褪色的是( )①氯气 ②液氯 ③新制的氯水 ④氯气的酒精溶液⑤盐酸 ⑥盐酸酸化的漂白粉溶液A．①②③ B．①②③⑥C．③⑥ D．②③⑥ 题目和参考答案——青夏教育精英家教网—

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【题目】下列物质能使干燥的蓝色石蕊试纸先变红后褪色的是( )

①氯气 ②液氯 ③新制的氯水 ④氯气的酒精溶液

⑤盐酸 ⑥盐酸酸化的漂白粉溶液

A．①②③ B．①②③⑥

C．③⑥ D．②③⑥

【答案】C

【解析】能使干燥的蓝色石蕊试纸变红说明溶液显酸性，而后褪色，说明溶液中有表现漂白性的物质。Cl2溶于水后得到氯水，既表现酸性又表现漂白性。盐酸酸化的漂白粉溶液既表现酸性又表现漂白性。

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