关于新制的氯水和久置的氯水,下列说法不正确的是(    )       A

关于新制的氯水和久置的氯水,下列说法不正确的是(    )

      A.新制的氯水呈黄绿色,久置的氯水无色 

      B.新制的氯水漂白作用强,久置的氯水漂白作用很弱或消失

      C.新制的氯水中没有氯离子,久置的氯水中才有氯离子

      D.新制的氯水中含氯气多,久置的氯水中含有极少量的氯气或不含氯气

答案

C

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