您所在的当前位置：高中化学试题 >

氯及其化合物

> 实验室制Cl 2时有如下操作：①连好装置，检查气密性；②缓缓加热；③加入MnO 2粉末；④向分液漏斗中加入浓盐酸；⑤将多余氯气用氢氧化钠溶液吸收；⑥用向上排气法收集氯气。操作顺序正确的是 A．①②③④⑤⑥ B．③④②①⑥⑤ C．①④③②⑥⑤ D．①③④②⑥⑤

问题：

发布时间：2024-09-09

实验室制Cl ₂时有如下操作：①连好装置，检查气密性；②缓缓加热；③加入MnO ₂粉末；④向分液漏斗中加入浓盐酸；⑤将多余氯气用氢氧化钠溶液吸收；⑥用向上排气法收集氯气。操作顺序正确的是

A．①②③④⑤⑥ B．③④②①⑥⑤ C．①④③②⑥⑤ D．①③④②⑥⑤

参考答案：

提问用户：Ow***nto

可能感兴趣的题目：

1 图是甲、乙两物体的位移和速度图象. 试（1）求出乙图中0-2秒内的加速度？（2）求甲、乙两物体在5s内的位移大小各是多少？
2 “黄梅时节家家雨，青草池塘处处蛙”形象地描述了 A.梅雨 B.台风 C.旱涝 D.沙尘暴
3 阅读如图所示的流程图，输出的结果为（　　） A．24 B．12 C．6 D．4
4 设 a ， b ， c 是互不共线的非零向量，给出下列命题：① ( a • b )2≤| a |2| b |2；② ( a • b )2= a 2• b 2；③若 |3 a +2 b |=|3 a -2 b |，则 a 与 b 垂直；④在等边△ABC中， AB 与 BC 的夹角为60°，上述命题中正确命题个数为（　　） A．1个 B．2个 C．3个 D．4个
5 “保护性耕作法”是指对耕地实行免耕或浅耕措施，并在粮食收割时，将作物秸秆粉碎后还田，或者将庄稼荐子留在田地过冬。表1为某地实验前后有关实验资料，回答9-10题。土壤水分土壤空气土壤有机质大气悬浮质大气水分实验前 6.3% 25.5% 0.7% 14.6% 18.6% 实验后 23.5% 16.7% 3.2% 3.4% 34.5% 小题1:实验结果反应了实行“保护性耕作法”能 ①保持土壤水分 ②增强土壤透气性 ③增加大气湿度 ④减少空气污染 A．①②③ B．①③④ C．①②④ D．①②③④ 小题2:当地农民对实验数据进行系统分析，给出灌溉、施肥、杀虫、除草配方，最后把杀虫剂、化肥施用到最需要的农田，从而减少污染、提高产量。这一过程中，使用的技术包括 A．GIS B．RS C．RS 、GIS D．RS、GIS、GPS
6 在溶液中能大量共存的一组离子或分子是 [ ] A．NH 4 +、H +、NO 3 -、HCO 3 - B．K +、Al 3+、SO 4 2-、 C．Na +、K +、SO 3 2-、Cl 2 D．Na +、CH 3COO -、CO 3 2-、OH -
7 2011年9月25日，我国用长征二号F型火箭成功发射“天宫一号”目标飞行器．火箭从开始起飞到离开发射塔用时6s，假设此过程是匀加速直线运动，已知发射架高1.2×10 2m ，忽略空气阻力，此过程中： (1)“天宫一号”的加速度多大； (2)火箭离开发射架瞬间的速度．
8 函数y=2sin4x+1的最小正周期是（　　） A． π 4 B． π 2 C．π D．2π
9 本次奥运会的举办地北京的行政区轮廓图是 A. B. C. D.
10 完形填空。 A little old couple walked slowly 1 McDonald"s one cold winter evening. They looked out of place among the young families and couples 2 there that night. Some of the customers looked 3 at them. You could tell what the admirers 4 ."Look, there is a couple who has been 5 a lot together, probably for 60 years or more!" The little old man walked up to the cash register, placed his order and paid 6 it. The couple took a table near the back wall and on their tray there was one hamburger, one order of French fries and one drink. The little man unwrapped the hamburger and cut it 7 . Then he carefully counted out the French fries, 8 them in two piles and neatly placed one pile in front of his wife. He took a sip of the drink, his wife took a sip and then set the cup down between them. 9 the man began to eat his few 10 of hamburger the crowd began to get restless. Again you could 11 what they were thinking."That poor old couple can only 12 one meal for the two of them. A young man stood up and came over to the old couple"s table. He politely 13 to buy another meal for them. The old man replied that they 14 everything. Then the crowd 15 that the little old lady 16 a bite. She just sat there 17 her husband eat. Again the young man came over and begged them 18 him buy them something to eat. They refused again. As the little old man finished eating, the young man could no longer stand it. Again he offered to buy some food. After 19 again, he asked the little old lady a question."Ma"am, why aren"t you eating? You said that you shared everything. What 20 you are waiting for?" She answered,"The teeth." ( )1. A. out of ( )2. A. eat ( )3. A. surprising ( )4. A. thought ( )5. A. over ( )6. A. off ( )7. A. in half ( )8. A. cut ( )9. A. As ( )10. A. mouths ( )11. A. say ( )12. A. afford ( )13. A. supplied ( )14. A. were used to share ( )15. A. found out ( )16. A. didn’t eat ( )17. A. watched ( )18. A. to allow ( )19. A. refused ( )20. A. is it B. into B. who eat B. anxiously B. would think B. through B. back B. into half B. divided B. Since B. hands B. talk B. bought B. provided B. used to share B. realizing B. ate B. watching B. to let B. to refuse B. is it that C. with C. eating C. curiously C. had thought C. throughout C. / C. in halves C. separated C. For C. bites C. tell C. offer C. offered C. used to sharing C. see C. had eaten C. seen C. permitting C. refusing C. was it that D. on D. were eating D. admiringly D. were thinking D. across D. for D. to halves D. put D. While D. sips D. speak D. afforded D. wanted D. were used to sharing D. noticed D. hadn’t eaten D. enjoy D. letting D. having refused D. was it