2021届中考化学二轮复习重难知识提分训练 （七）曲线图像题
※题型：单选题※知识点：单选题※试题难度：较难<br>室温下,将稀盐酸滴入装有氢氧化钠溶液的烧杯中,用温度计测出烧杯中溶液的温度,溶液温度随加入稀盐酸的质量而变化,如图所示,下列叙述错误的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/29/4632F83BF62714C69E382C6DE65A98C5.png"><br>A.<br>b<br>点表示酸、碱恰好完全反应<br>B.稀盐酸与氢氧化钠溶液的反应是放热反应<br>C.从<br>a<br>到<br>b<br>过程中,烧杯中溶液的pH逐渐增大<br>D.<br>c<br>点时,溶液中的溶质是氯化钠和氯化氢<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/dc069ba3959643babfd2f2ab7263c72a/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/20952e1aa6c844e294f39d3cda9dca29/4C939C4C6B78D1142BFA071A2C17E8C0.png"><br><br>※题型：多选题※知识点：多选题※试题难度：中等<br>下列图象能正确反映对应变化关系的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/2BEFD480D0901A625E230C0202F247F0.png"><br>A.在一定温度下,向不饱和的硝酸钾溶液中加入硝酸钾固体,充分搅拌<br>B.向NaOH溶液中逐滴加入稀盐酸<br>C.将一定质量的稀盐酸平均分为两份,分别向其中加入足量的金属Zn和Fe<br>D.在一定量<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/6F534987C23C520E13822FA926969555.png"><br>和HCl溶液中逐滴加入NaOH溶液<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/fbdf1d6a042440d9900afb5abc5ffd97/4D602B79606E3B65829E8D0313A702E6.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较难<br>下列图象能正确反映其对应变化关系的是( )<br><tbody><br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/26/38BFA057AD4FC5C5DF7C0B6B57ED81E3.jpeg"><br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/26/73D1E6EA76ED590DE47966D68B397905.jpeg"><br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/26/493D6D1EC8F888A79E334147567AB214.jpeg"><br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/26/4BF3AE92296BD2E5D96236D7EB967796.jpeg"><br>A.足量镁条在密闭容器中燃烧<br>B.向一定质量的稀盐酸中加入足量的铝片<br>C.将铁钉加入足量的硫酸铜溶液中<br>D.一定条件下氧化铜和碳粉恰好完全反应<br></tbody><br>A.A B.B C.C D.D<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/40b499fce4d54e06a487eaedc0228c36/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/05ba74bbf27c4e6d8fab57d06f04372e/65BF77DCC8AC7454F812DE94B46BDE0E.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较难<br>如图为A、B、C三种物质(均不含结晶水)的溶解度曲线,下列说法正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/0F46D9936E3D4DC8C8B642C09C2A19F9.png"><br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/97DE7627ECA82C404E1EFD3560FA9B7B.png"><br>时,A、C两种物质饱和溶液中含有的溶质质量一定相同<br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/97DE7627ECA82C404E1EFD3560FA9B7B.png"><br>时,A溶液溶质质量分数为20<br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/32950889DA083F8FEB4B456B77CE675B.png"><br>的三种物质的饱和溶液降温到<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/97DE7627ECA82C404E1EFD3560FA9B7B.png"><br>时,溶质质量分数由大到小的顺序为B>A=C<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/31/97DE7627ECA82C404E1EFD3560FA9B7B.png"><br>时,125gA物质的饱和溶液加水稀释可以得到250质量分数10%的A物质的溶液<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/d43c117f48fe49eb9a18da8b0ded5111/01A39E48B8A67989A23F6887F26FCC64.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>下图是工业上制取乙醇反应的微观示意图(其中“<img src="https://picture2.zhihuicn.com/testImage/2/2021/4/1/22CEDAD6709214B498A195FF8CC768B0.png"><br>”代表氢原子,“<img src="https://picture2.zhihuicn.com/testImage/2/2021/4/1/A53909104659B55B6CF0AD55F11DED90.png"><br>”代表碳原子,“<img src="https://picture2.zhihuicn.com/testImage/2/2021/4/1/58CB0F5D1F6D264D1C0AEF5E6A67A39C.png"><br>”代表氧原子)。下列叙述不正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/4/1/66FD160B2EAD4AAA899E8887B35BCD8D.png"><br>A.反应前后两种有机物的质量比为14:23<br>B.反应前后分子种类发生了改变但原子种类没变<br>C.乙醇由1个氧原子、2个碳原子、6个氢原子构成<br>D.反应的化学方程式为<img src="https://picture2.zhihuicn.com/testImage/2/2021/4/1/3614582F7EE00E02EB1872CE9AA380F1.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c5cb7dbbb2534a0e93f68d14c366524c/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/90fb814f1bfd44ebad405207357e543e/D6544503EAB2ACE0EA9E48538912ACCE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图是汽车尾气中有毒气体转变为无毒气体的微观示意图。图中不同的圆球代表不同的原子。下列说法正确的是<br>A.<br>反应前后分子的种类、数目均无变化<br>B.<br>此反应属于化合反应<br>C.<br>反应后的图片中一共有三种分子<br>D.<br>参加反应的两种分子的个数比为<br>:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/29/8548F5FBA1EE51A3E3749FC5C3116CFC.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/4155b35a9e124565ae7c21f228bc3e4c/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/0129c80c530a48389156ea70e1dc87b9/FEB9E3342038B674840C71AC3A8D461D.png"><br><br>
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