2.3水分子的变化—2021-2022学年化学鲁教版（五四制）八年级全一册随堂小测
※题型：单选题※知识点：单选题※试题难度：较易<br>有关氢气验纯的操作,正确的是( )<br>A.一般用向上排空气法收集一试管的氢气来验纯<br>B.验纯时,用拇指堵住试管口,并且试管口向上<br>C.验纯点火时,若没有听到任何声音,则表示氢气已纯<br>D.验纯点火时,发出尖锐的爆鸣声,则氢气不纯<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/c3837791fb5d48f18fa7216327d48e1f/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：中等<br>电解水实验如下图。下列说法正确的是( )。<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/25/4FDCE22703EEA6F397D5C3622A504969.png"><br>A.试管2中得到<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/25/3FD11E2AFC06B1D240106659D73AE871.png"><br>B.产生<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/25/3FD11E2AFC06B1D240106659D73AE871.png"><br>与<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/25/43916A0CBDACF639905BC5CD89370C97.png"><br>的体积比约为1:2<br>C.该实验说明水是由<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/25/3FD11E2AFC06B1D240106659D73AE871.png"><br>和<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/25/43916A0CBDACF639905BC5CD89370C97.png"><br>组成的<br>D.可用带火星的木条检验生成的<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/25/43916A0CBDACF639905BC5CD89370C97.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/06033e822a8c4d3081b86942d742e653/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：容易<br>下列物质的用途中,主要利用化学性质的是( )<br>A.用铜丝作导线<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/8558087DB0513C83B8C643312D9D1811.png"><br>B.酒精作燃料<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/A33C07CD7D5567E19EA48BB2C68426DA.png"><br>C.食盐作调味品<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/52CC54A1E38A15C6A746F63E7D7B3EB8.png"><br>D.用铁制作铁锅<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/F3FAB6264DC782DCE252FD6C912B0807.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/3f560f23300a43ca8d12e9f50c9a71b1/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/b3a573cde13c45549241d75c68155b47/62745FCE5C09F9593C00DAB1B12BE2FE.png"><br><br>
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