本课配套习题挑战模式1/5
单选题
难度系数:
1.如图在盛有溴水的三支试管中分别加入汽油、四氯化碳和酒精,振荡后静置,出现下列现象,正确的结论是
A: ①加入的是CCl4,②加汽油,③加酒精 |
B: ①加入的是酒精,②加CCl4,③加汽油 |
C: ①加入的是汽油,②加酒精,③加CCl4 |
D: ①加入的是汽油,②加CCl4,③加酒精 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rG95rK55ZKM5Zub5rCv5YyW56Kz6YO95Y+v5Lul6JCD5Y+W5rq077yM6ICM6YWS57K+5rq25LqO5rC0
- 提示2:5rG95rK555qE5a+G5bqm5bCP5LqO5rC077yM5Zub5rCv5YyW56Kz55qE5a+G5bqm5q+U5rC05aSn44CC
- 答案:RA==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.用CCl4萃取碘的饱和水溶液中的碘,下列说法不正确的是
A: 萃取时,要充分振荡混合液体并适当旋转活塞排气减压 |
B: 碘在CCl4中的溶解度比在水中的溶解度大,碘的CCl4溶液呈紫红色 |
C: 使用前要检查分液漏斗是否漏液 |
D: 分液时,水从分液漏斗下口流出,碘的CCl4溶液从漏斗上口倒出 |
一次做对,真牛!
+5奖励规则>
- 提示1:6JCD5Y+W5a6e6aqM5Lit77yM6KaB5qC55o2u6JCD5Y+W5YmC5LiO5Y6f5rq25YmC55qE5a+G5bqm6Ym05Yir5LiK5bGC5LiO5LiL5bGC55qE5oiQ5YiG44CC
- 提示2:5LiL5bGC5ray5L2T5LuO5LiL5Y+j5rWB5Ye677yM5LiK5bGC5ray5L2T5LuO5LiK5Y+j5YCS5Ye644CC
- 答案:RA==
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
本课配套习题挑战模式3/5
单选题
难度系数:
3.在盛有碘水的分液漏斗中,加入少量CCl4后振荡,静置片刻后,下列叙述正确的
A: 整个溶液变紫色 |
B: 上层为无色,下层为紫红色 |
C: 为了提高效率,萃取后应该马上分液 |
D: 分液时,先把分液漏斗上层液体从上口倒出,再把下层液体从下口放出 |
一次做对,真牛!
+5奖励规则>
- 提示1:6Zmk5LqG5LiK5LiL5bGC55qE6L6o6K+G5Lul5Y+K5YiG5ray5pON5L2c77yM6L+Y6ZyA6KaB5rOo5oSP77yM5Zyo5YiG5ray5YmN6ZyH6I2h5ZCO77yM5bqU6K+l6Z2Z572u6Laz5aSf55qE5pe26Ze077yM6K6p5ray5L2T5YiG5bGC5a6M5YWo44CC
- 答案:Qg==
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
本课配套习题挑战模式4/5
单选题
难度系数:
4.用四氯化碳萃取碘水中的碘,下列说法中不正确的是
A: 实验中使用的主要仪器是分液漏斗 |
B: 碘在四氯化碳中的溶解度比在水中的溶解度大 |
C: 碘的四氯化碳溶液呈紫色 |
D: 分液时,水从分液漏斗下口放出,碘的四氯化碳溶液从分液漏斗上口倒出 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zub5rCv5YyW56Kz55qE5a+G5bqm5aSn5LqO5rC055qE5a+G5bqm44CC
- 答案:RA==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.下列萃取与分液结合进行的操作(用CCl4为萃取剂从碘水中萃取碘)中错误的是
A: 饱和碘水和CCl4加入分液漏斗中后,塞上上口部的塞子,用左手压住分液漏斗上口部,右手握住活塞部分,把分液漏斗倒转过来振荡 |
B: 静置,分液漏斗中溶液分层,下层呈紫红色,上层几乎无色 |
C: 打开分液漏斗的活塞,使全部下层液体沿承接液体的烧杯内壁慢慢流出 |
D: 最后继续打开活塞,另用容器承接并保存上层液体 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rOo5oSP5YiG5ray55qE5pON5L2c5Lit77yM5LiL5bGC5ray5L2T5LuO5rS75aGe5aSE5rWB5LiL77yM6ICM5LiK5bGC5ray5L2T6ZyA6KaB5LuO5YiG5ray5ryP5paX5LiK5Y+j5YCS5Ye644CC
- 答案:RA==
5LiK5bGC5ray5L2T5bqU5b2T5LuO5YiG5ray5ryP5paX5LiK5Y+j5YCS5Ye677yMROmhuemUmeivr+OAguaVhemAieaLqUTpobnjgII=