上海市2021届中考化学试卷
※题型：单选题※知识点：单选题※试题难度：容易<br>下面哪个气体是稀有气体( )<br>A.氦气 B.氮气 C.氯气 D.氧气<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/d79502392f33487babdd6e225c77ca21/E7F0EDF83F40244C8F0C84B97471AED6.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>以下酸性最强的是( )<br>A.pH=1 B.pH=3 C.pH=5 D.pH=7<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/ddf45f2529de4888b35d31c4f2f4f2f8/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br>略<br>※题型：填空题※知识点：填空题※试题难度：容易<br>灼烧氯化钠,火焰呈<br>____<br>色。<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/075361dd778645dfa04c449f13e4b013/B38DF9BA19A95E71F9E6684939E6E71B.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>用氯酸钾制取<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/43916A0CBDACF639905BC5CD89370C97.png"><br>,下列化学方程式正确的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/1BAF67FBE7A8A2E2EE4EEB9C70F45082.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/7CFFEB4F95502BE47D6DF7A4792FC11A.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/8C50DCF6307E3E48AFED04FCF82F504A.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/8731B1A1BF47E1E4FA87D24561555D56.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/f42b2830e66e4980b5ee23ed7c03dbcc/06CA09E70C17EF8BA2D3B8C70D693953.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>利用下图,欲除去X气体中<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/8DB170136294345756639DAE736C3D59.png"><br>杂质,对应的Y正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/B375B59B93FBD243AA845C0AE2CCB529.png"><br><tbody><br>X杂质<br>Y<br>A<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/3AB34B1B8224706C6E4369A324ED490A.png"><br>(CO)<br>Cu<br>B<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/65735F447DEF2AB0CFBA88F4DD86C7F4.png"><br>Cu<br>C<br>CO(<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/BDF900345AF09A3015F45B2669FF3895.png"><br>)<br>CuO<br>D<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/1E05669C763B290A06DDA7063946F8C6.png"><br>CuO<br></tbody><br>A.A B.B C.C D.D<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/e3147b0a2b744e2f8a9dac6887d775b5/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br>略<br>※题型：多选题※知识点：多选题※试题难度：中等<br>对于t℃时的30%<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/128F55B144935C78E07F02CFC2D09193.png"><br>溶液,下列说法正确的是( )<br>A.均一、稳定、透明<br>B.每100g水中溶解30g<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/128F55B144935C78E07F02CFC2D09193.png"><br>C.某种条件下,可转化为悬浊液<br>D.若再加30g硝酸钾,则变为60%<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/128F55B144935C78E07F02CFC2D09193.png"><br>溶液<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/3d7f1b7044d445b48e2d994a4a87c218/3B542E2E5009FB2B8A841B80B58D5603.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>对于碱,下列说法正确的是( )<br>A.碱一定含有H元素<br>B.可使酚酞变红的都是碱溶液<br>C.所有非金属氧化物都可与碱溶液反应<br>D.酸与碱反应一定不产生沉淀<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/ed3e983f1dd64e2696d679439042497a/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br>略<br>※题型：多选题※知识点：多选题※试题难度：较易<br>下列选项中,<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/43916A0CBDACF639905BC5CD89370C97.png"><br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/8DB170136294345756639DAE736C3D59.png"><br>物理量比<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/D350503FAEB172B50F09D85EB5C5B0A3.png"><br>大的是( )<br>A.一个<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/43916A0CBDACF639905BC5CD89370C97.png"><br>分子和一个<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/D350503FAEB172B50F09D85EB5C5B0A3.png"><br>分子的质量<br>B.1mol<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/43916A0CBDACF639905BC5CD89370C97.png"><br>和1mol<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/D350503FAEB172B50F09D85EB5C5B0A3.png"><br>的质量<br>C.1g<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/43916A0CBDACF639905BC5CD89370C97.png"><br>和1g<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/D350503FAEB172B50F09D85EB5C5B0A3.png"><br>的分子数<br>D.1mol<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/43916A0CBDACF639905BC5CD89370C97.png"><br>和1mol<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/D350503FAEB172B50F09D85EB5C5B0A3.png"><br>的分子数<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/4951b0abb46948bfa662495ff7140c6d/F05F41FFB1AEDF335FC9F5087E5D9329.png"><br>解析<br>略<br>※题型：填空题※知识点：填空题※试题难度：中等<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/3AB34B1B8224706C6E4369A324ED490A.png"><br>是一种常见的物质,回答下列问题:<br>1.木炭燃烧的化学方程式:_______;<br>2.用启普发生器制<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/3AB34B1B8224706C6E4369A324ED490A.png"><br>如图所示,在多孔塑料板上放着的块状固体为_______;所用HCl的量不宜太多,若液体在反应时,液面处于a处,则关闭弹簧夹时导致的后果是:_______;<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/8098540CD7812DFD064EA5AAFD6F55AF.png"><br> 3.实验小组欲制取<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/C33BDE800D867632B103C25FB2DA0A2F.png"><br>,步骤如下图:<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/9CD74829FC778193A2B5D5EED60D14DC.png"><br>Ⅰ.步骤①的化学方程式:_______;Ⅱ.需要加_______药品,理论上可以不断生成<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/12/C33BDE800D867632B103C25FB2DA0A2F.png"><br>,原因是:_______;<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/6e9050c9e16d4e389b640e732557bccd/FA20AFCB15E9940E94F5C14324D496C1.png"><br>解析<br>略<br>※题型：实验题※知识点：实验题※试题难度：中等<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/20FDA8B92EBA8B408024FDDB3E1DC09C.png"><br>是一种难溶的碱,可用<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/0C7901C77903E8BAF76E821F809A46C4.png"><br>和<br>NaOH<br>反应制取<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/20FDA8B92EBA8B408024FDDB3E1DC09C.png"><br>,现用该方法制取纯净的<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/20FDA8B92EBA8B408024FDDB3E1DC09C.png"><br>1.氢氧化钠的俗称___,两种物质在20℃的溶解度如下表所示,此时溶解度较小的物质是___。<br><tbody><br>物质<br>溶解度(g/100g水)<br>NaOH<br>109.0<br>NaCl<br>36.0<br></tbody><br>2.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/0C7901C77903E8BAF76E821F809A46C4.png"><br>和NaOH反应的化学方程式_______,生成物质质量如下图所示,则a为_______。<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/B148855F5EBAFAE2919EDCE3650E0B91.png"><br>3.按下表方法可否达成实验目的?_____结合数据分析,说明理由____。<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/2888BD082C03175E9EC9F70C8ACD40FC.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/4e9317140d8c4e758e8b4c0686518151/AF588A48AD914AA9BF2507E1915B8C52.png"><br>解析<br>略<br>※题型：实验题※知识点：实验题※试题难度：中等<br>铁、铜、银的金属活动性,并回收<br>Ag<br>①<br>判断铁、铜、银中金属活动性最强的是<br>_______<br>;<br>②Cu<br>与<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/8A763D71E086C83FA2DCFA8805132E5B.png"><br>反应的化学方程式<br>_______<br>;<br>Fe<br>与<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/63116A891207AED4C20441DF9C31E3A7.png"><br>反应后,<br>Fe<br>表面析出<br>_______<br>色固体;<br>③<br>现有<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/33C6F6E7490EFC1C8F8E6C73043019FE.png"><br>混合废液,目<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/8DB170136294345756639DAE736C3D59.png"><br>回收<br>Ag<br>:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/01202D2FE153911EC7F10983E12E002E.png"><br>ⅰ.<br>滤液<br>A<br>的溶质是<br>_______<br>;步骤<br>Ⅲ<br>中加入足量<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/8A763D71E086C83FA2DCFA8805132E5B.png"><br>溶液的目的是<br>_______<br>;<br>何确定<br>滤液<br>C<br>中有<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/13/8A763D71E086C83FA2DCFA8805132E5B.png"><br>,应选<br>_______<br>溶液;<br>ⅱ.<br>若将步骤<br>Ⅰ<br>中的<br>amolCu<br>改为<br>amolFe<br>,最终得到<br>Ag<br>的质量是否会改变,请说明理由:<br>____<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/b6ba7d663b0442c882d22c712cf21679/16D81FDC3C049AADCB9CB13A8494356A.png"><br>解析<br>略<br>
页:
[1]