[题目]甲.乙.丙三种溶液各含有一种X-(X-为Cl-.Br-或I-)离子.向甲中加入淀粉溶液和新制的氯水.溶液变为橙色.再加入丙溶液.颜色无明显变化.则甲.乙.丙依次为( )A．Br-.Cl-.I- B．Br-.I-.Cl-C．I-.Br-.Cl- D．Cl-.I-.Br- 题目和参考答案——青夏教育精英家教网—

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【题目】甲、乙、丙三种溶液各含有一种X－(X－为Cl－、Br－或I－)离子，向甲中加入淀粉溶液和新制的氯水，溶液变为橙色，再加入丙溶液，颜色无明显变化，则甲、乙、丙依次为( )

A．Br－、Cl－、I－ B．Br－、I－、Cl－

C．I－、Br－、Cl－ D．Cl－、I－、Br－

【答案】B

【解析】向甲中加入淀粉溶液和新制的氯水，溶液变为橙色，说明原溶液中含有Br－，再加入丙溶液，颜色无明显变化，说明丙溶液中含有Cl－，故B项正确。

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增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

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