下列关于氯水的叙述中，正确的是:
A．新制氯水中没有分子，只有离子
B．新制氯水在光照的条件下，可以产生气体，该气体是氯气
C．新制氯水中滴加硝酸银溶液，没有任何现象
D．氯气可以使湿润的有色布条褪色
答案：D
考查氯水的成分及性质
A：氯水中存在水、次氯酸及氯气三种分子，错
B：Cl2＋H2O=HCl＋HClO 2HClO
2HCl＋O2↑，故该气体为氧气
C：氯水中的氯离子可与银离子生成白色沉淀
D：氯水中的次氯酸具有强氧化性、漂白性，可使湿润的有色布条褪色
故答案为D
| 短文改错。 文中共有10处语言错误，每句中最多有两处。 错误涉及一个单词的增加、删除或修改。 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：在错的词下划一横线，并在该词下面写出修改后的词。 注意：每处错误及其修改仅限一词。只允许修改10处，多者（从第11处起）不计。 | |
| Peter was a small boy. He lived in with his parents in a small house near some hills. People there were both poor. One night it was very dry and windy. When everybody was asleep, Peter sudden heard some noise. It came out from the kitchen. He got up and walking to the kitchen. He found that the wood besides the stove was burning. There was no water tap in the house, but he could not put out the fire. He shouts loudly to wake up everyone in the house. Then she ran out of his house and knocked at the doors of many houses to wake people up. They all left their house quickly. At last the fire was put out the firemen. Many houses were burnt. But nobody was burnt in the fire. _______________________________________________________________________________ |