2021-2022学年九年级上册化学鲁教版暑假提前学（4）水分子的变化
※题型：单选题※知识点：单选题※试题难度：较易<br>通常纯水电解的速率很慢,实验室常用加入少量<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/A840BE7064D668C399BA7C32300DEAD9.png"><br>的水进行电解水实验,从该实验中不能获取的信息是( )<br>A.纯水的导电能力弱<br>B.负极产生气体的速率比正极快<br>C.正、负极产生的气体质量比约为1:2<br>D.水由氢元素和氧元素组成<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c47119511f144f59a88903e0bb25fdcd/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/fd7af98600914e1eb2dbe01493b1766f/BCA57EFF46D7C5B2FAE51A8DE69254B9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>一氧化碳是一种有毒的气体,下列对其性质的描述属于化学性质的是( )<br>A.高温下能与氧化铁反应 B.常温下为气体<br>C.无色无味 D.难溶于水<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/fce4ff0358264ef1b7996f2921a2360a/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/3e0cfde837f1450091d96fbed2f285ec/9B13F06647AE978C102C6B8967242E3E.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>下列描述中,<br>(填序号,下同)是物理变化;<br>是化学变化;<br>是物理性质;<br>是化学性质。<br>①二氧化碳能使澄清石灰水变浑浊<br>②钢铁生锈<br>③电灯通电发光、放热<br>④冰雪融化<br>⑤煤气燃烧<br>⑥铜器上出现铜绿<br>⑦镁能燃烧<br>⑧氧化铜是黑色粉末<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/db34a51a3b934de184826c6afa02d56e/170C15AD911D8746A849A5A3B225F465.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/6d73443ddb604cb096492b2034cb8de6/378159AF1086387225796C34701B1E56.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>电解水的实验装置如图所示,回<br>答下列问题:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/4A835F3B87EBA2B616C8BE0BAF5E2822.png"><br>1.电源中a电极是电源的(填“正”或“负”)极。<br>2.若收集到c气体22.4mL,则理论上应收集到d气体mL。<br>3.电解水时没有发生改变的粒子是。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/9e73ee9fd788481da92f7d85238d0ae6/5FB8244C1AF6D557530D62F80BEAF6F1.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/ac8c4a04800347b294a709ea8815a290/C549BBEE54A7E1D8F4555CF6BEE2B48A.png"><br><br>
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