2021-2022学年九年级上册化学鲁教版基本概念单元小练（四）我们周围的空气
※题型：单选题※知识点：单选题※试题难度：中等<br>豆浆被称为“植物奶”,其中的异黄酮(<img src="https://picture2.zhihuicn.com/testImage/2/2018/7/10/21076AC437ECC638972858327A13F761.png"><br>)具有防癌功能,下列关于异黄酮的说法错误的是( )<br>A.异黄酮是由分子构成的<br>B.异黄酮中碳、氢、氧三种元素的质量比为15:10:2<br>C.异黄酮是由碳、氢、氧三种元素组成<br>D.异黄酮的相对分子质量为222<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2018/287874eb5dce440ca382080e4c95ef0f/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2018/eaabf910c6ae4fd9bbb4d2107d6ff8bb/D215813CC23F12CB5ED7F58EF3ADA8FA.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>亳白芍的提取物芍药苷<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/10/AC48FAD1A73868FCA12AC82E665AE421.png"><br>是抗炎免疫调节药。下列有关芍药苷的说法正确的是( )<br>A.属于氧化物<br>B.由23个碳原子、28个氢原子和11个氧原子构成<br>C.由三种非金属组成<br>D.其中碳元素的质量分数最大<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/6064e2a18b274ffbb69be723bc03e905/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/4c6758a9578a4d8eb999c492ce4cf628/ADE867820464BAD7D6566A1AAF760F44.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>常温下,氯气与苛性钠溶液反应产物是氯化钠、次氯酸钠(NaClO)和水。次氯酸钠中氯元素的化合价为( )<br>A.-1 B.+1 C.-2 D.+2<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2018/e07200f7634b450bb0f45fa5ba867d12/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2018/ab29421f05264572aa65875e3e9cced3/AB259C4D06EE444F5B9F0BA239BE43B7.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>下列变化不属于缓慢氧化的是( )<br>A.动植物的呼吸 B.钢铁生锈<br>C.木炭燃烧 D.橡胶老化<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/fd2b24ef49a245eea0b4780bfdeaf0ac/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/58e8fd169be248609d09ddbbb67c0e62/959D81F524CD9CBAA39BB2690AE504B8.png"><br><br>
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