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【题目】含有NaBr、KI的溶液中通入过量的Cl2,然后将溶液蒸干,并灼烧固体,最后得到的固体物质是( )

A.KCl B.NaCl和KCl

C.NaCl和KBr D.NaCl、KCl和I2

【答案】B

【解析】向含有NaBr、KI的溶液中通入过量的Cl2,发生如下反应:Cl2+2NaBr=2NaClBr2 Cl2+2KI=2KClI2,将溶液蒸干,Cl2、Br2、I2均挥发,故剩余固体为热稳定性高的NaCl和KCl,B项正确。

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