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一、选择题 1.进行淀粉水解实验(包括检验水解产物及水解是否完全)除淀粉外,还使用下列试剂或其中的一部分①碘水,②银氨溶液,③NaOH溶液,④稀硫酸,⑤PH试纸。使用上述试剂的顺序是[ ] (A)①②③④ (B)④①②③ (C)④①③② (D)④①③②⑤ 2.能够说明苯分子中碳原子间不存在一般的单键和双键,而存在完全等同的碳碳键的事实是[ ] (A)甲苯不存在同分异构体 (B)邻二甲苯不存在同分异构体 (C)间二甲苯不存在同分异构体 (D)对二甲苯不存在同分异构体 3.下列物质中,不属于酯类物质的是
First, multiple-choice questions 1. To carry out starch hydrolysis experiments (including testing of hydrolysis products and hydrolysis is complete) in addition to starch, but also use the following reagents or part of 1 iodine water, 2 silver ammonia solution, 3NaOH solution, 4 dilute sulfuric acid, 5PH test paper . The order of using the above reagents is [] (A)1234 (B)4123 (C)4132 (D)41325 2. It can be shown that the common single and double bonds do not exist between carbon atoms in the benzene molecule, but there is exactly the same carbon The fact that carbon bonds are [] (A) toluene is absent isomer (B) o-xylene is absent Isomer (C) xylene isomer is absent (D) p-xylene There are no isomers. 3. Among the following substances, those that are not esters are