四川2026年特岗教师《化学》模拟试题及答案

四川2026年特岗教师《化学》模拟试题及答案一、选择题（本题共20小题，每小题3分，共60分。每小题只有一个选项符合题意）1.化学与生活密切相关，下列说法正确的是（）A.糖类、蛋白质、油脂均属于天然高分子化合物B.“84消毒液”的有效成分是次氯酸钠，可以与洁厕灵（主要成分盐酸）混合使用以增强消毒效果C.明矾和铁盐在水中都能发生水解反应，且均可用于净水D.推广一乙醇汽油是为了减少碳排放，其中乙醇是一种不可再生的能源2.设为阿伏加德罗常数的值，下列说法正确的是（）A.标准状况下，2.24L辛烷完全燃烧生成的二氧化碳分子数为0.8B.1mol/L的NaCl溶液中含有N的数目为C.常温常压下，14g氮气()和28g一氧化碳(CO)所含的原子数均为2D.1molFe与足量氯气反应，转移电子数为23.下列有关化学用语表示正确的是（）A.硫离子的结构示意图：16B.聚乙烯的结构简式：−C.乙酸乙酯的官能团名称：羧基D.氢氧化钠的电离方程式：N4.短周期主族元素X、Y、Z、W的原子序数依次增大。X是地壳中含量最多的元素，Y的原子最外层电子数是其电子层数的2倍，Z是金属元素且其阳离子与X的阴离子电子层结构相同，W的单质常温下为黄绿色气体。下列说法正确的是（）A.原子半径：rB.氢化物的稳定性：XC.Z的最高价氧化物对应的水化物是强碱D.W的单质与水反应的离子方程式：C5.下列离子方程式书写正确且反应能发生的是（）A.碳酸钙与稀盐酸反应：CB.氯化铁溶液中加入铁粉：FC.硫酸铜溶液与氢氧化钡溶液混合：BD.碳酸氢镁溶液中加入过量氢氧化钠溶液：M6.下列关于有机化合物的叙述正确的是（）A.乙醇和乙酸都能与钠反应放出氢气，且乙酸反应更剧烈B.苯和乙烯都能使溴水褪色，且反应原理相同C.石油裂化和裂解的主要产物都是乙烯D.油脂皂化反应完成后，反应混合物中加入食盐可将高级脂肪酸钠析出7.下列实验操作正确且能达到目的的是（）A.除去乙酸乙酯中含有的少量乙酸：加入足量乙醇和浓硫酸，加热B.除去苯中含有的少量苯酚：加入浓溴水，过滤C.配制100mL0.1mol/L氯化钠溶液：将11.7g氯化钠固体溶于100mL水中D.比较碳酸和硅酸的酸性强弱：将二氧化碳气体通入硅酸钠溶液中8.一定条件下，可逆反应2S(gA.升高温度B.增大压强C.使用催化剂D.及时分离出S9.常温下，下列各组离子在指定溶液中一定能大量共存的是（）A.pH=1的溶液中：F、N、B.c()/c(O)=C.加入铝粉能产生氢气的溶液中：N、HC、C、D.透明溶液中：M、O、N、N10.关于原电池和电解池的叙述，正确的是（）A.原电池工作时，电子从正极流向负极B.电解池工作时，阳极发生氧化反应，阴极发生还原反应C.铁锅生锈属于化学腐蚀，与电化学无关D.铅蓄电池放电时，负极质量增加11.下列有关金属及其化合物的说法正确的是（）A.钠在空气中燃烧生成淡黄色的NB.铝罐车可用于运输浓盐酸C.铜在潮湿的空气中生锈生成CD.铁与水蒸气高温下反应生成F和12.下列化学工业生产原理或反应条件错误的是（）A.工业制硫酸：SB.工业制硝酸：NC.工业制水煤气：CD.工业炼铁：213.已知：2(g(g)若有1mol丙烷完全燃烧生成液态水，则反应放出的热量为（）A.571.6B.2220.0C.1648.4D.2791.614.下列关于物质结构和性质的叙述错误的是（）A.干冰是分子晶体，SiB.CC和NC.HF、HCl、HD.分子中存在氮氮三键，键能大，性质稳定15.下列说法正确的是（）A.pH=B.常温下，将CCOONC.0.1mol/D.常温下，=1.0×，则C时，纯水的16.某有机物结构简式为$\begin{matrix}\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\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