4.1空气的成分—2021-2022学年化学鲁教版九年级上册随堂小测
※题型：单选题※知识点：单选题※试题难度：中等<br>大山深处空气清新,空气中氮气的体积分数约为( )<br>A.78% B.21% C.11% D.58%<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/ef801a304db24895ba1e03508b59f5ad/E7F0EDF83F40244C8F0C84B97471AED6.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>节日里五光十色的霓虹灯内填充的气体是( )<br>A.氧气 B.氮气 C.稀有气体 D.二氧化碳<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/9b4c2a0c6a7b44b3b4b55084e38b2733/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/84ca7625074e445e91307707a81dbb15/6E1FFD0603689D8EC228E5364C3CC3E3.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>有关空气及其成分的说法正确的是( )<br>A.空气是一种宝贵的自然资源,是一种混合物<br>B.空气中氧气约占空气总质量的五分之一<br>C.空气是由空气分子构成的<br>D.汽车排放的尾气不会对空气造成污染<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/24cb1d9cb49f4836b9f49be19dd67046/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/4ce42bad9418451f8ea4cd3fc483a1dc/29A9E77CD41BAC3BE581AD115CA0949D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>测定空气成分含量的实验中,体积分数约占1/5的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/8/43916A0CBDACF639905BC5CD89370C97.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/8/D350503FAEB172B50F09D85EB5C5B0A3.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/8/7002435560602C62060BA723DC55D86C.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/8/AA5DD1505F1D7A06A012CABC988FF45C.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/a1016488fe20470a827dc71e961b5bef/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br>略<br>
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