本课配套习题挑战模式1/5
单选题
难度系数:
1.蒸馏时温度计的水银球应处在什么位置
A: 液面下 |
B: 液面上 |
C: 支管口 |
D: 任何位置 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rip5bqm6K6h6ZyA6KaB5rWL6YeP55qE5piv4oCc6JK45rG94oCd55qE5rip5bqm77yM6ICM5LiN5piv5ray5L2T55qE5rip5bqm44CC
- 答案:Qw==
5Zug5rip5bqm6K6h5rWL6YeP55qE5piv6JK45rG955qE5rip5bqm77yM5pWF5bqU5pS+5Zyo5pSv566h5Y+j77yM5aaC5p6c5oqK5rip5bqm6K6h5pS+5Zyo5pSv566h5Y+j5Lul5LiL55qE5Zyw5pa577yM6L+Z5pe25YCZ55qE5rip5bqm5piv5q+U5pSv566h5Y+j55qE5rip5bqm55Wl5L2O77yM5b6A5LiK5Y2z5piv5q+U5pSv566h5Y+j55qE5rip5bqm6LaK6auY77yM5oiR5Lus5omA6KaB5pS26ZuG55qE54mp6LSo6YO95pyJ5piO56Gu6KeE5a6a5rip5bqm77yM5omA5Lul55Wl6auY5oiW6ICF5piv55Wl5L2O6YO95LiN56ym5ZCI77yMPGJyPuaVhemAiUPvvI4=
本课配套习题挑战模式2/5
单选题
难度系数:
2.下列关于蒸馏操作的有关叙述不正确的是
A: 蒸馏操作主要仪器是:蒸馏烧瓶、酒精灯、铁架台、冷凝管、锥形瓶、温度计 |
B: 蒸馏操作使用的温度计的水银球应插入到液体内 |
C: 在蒸馏烧瓶内放入少量碎瓷片,目的是防止暴沸 |
D: 冷凝管进出水的方向是下进上出 |
一次做对,真牛!
+5奖励规则>
- 提示1:6JK46aaP5pON5L2c5Lit77yM5rip5bqm6K6h55qE5L2N572u5ZKM5Ya35Yed5rC055qE5pa55ZCR5piv6ZyA6KaB5qC85aSW5rOo5oSP55qE5YWz6ZSu54K544CC
- 答案:Qg==
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
本课配套习题挑战模式3/5
单选题
难度系数:
3.在蒸馏实验中,下列叙述不正确的是
A: 蒸馏烧瓶可直接加热 |
B: 在蒸馏烧瓶中放入几粒沸石,防止暴沸 |
C: 冷水从冷凝管下口入,上口出 |
D: 收集蒸馏水时,应弃去开始馏出的部分液体 |
一次做对,真牛!
+5奖励规则>
- 提示1:54On55O25LiN5Y+v5Lul55u05o6l5Yqg54Ot
- 提示2:5omL5py66JK46aaP5rC05pe277yM5Yia5byA5aeL6aaP5Ye655qE5ray5L2T5Y+v6IO95ZCr5pyJ5p2C6LSo44CC
- 答案:QQ==
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
本课配套习题挑战模式4/5
单选题
难度系数:
4.下列关于蒸馏操作要点及原因中,正确的是
A: 蒸馏烧瓶可以直接加热,不用垫石棉网 |
B: 温度计水银球插入蒸馏的混合液中,以控制蒸馏的温度 |
C: 冷凝管中冷却水与被冷凝蒸气或液体流向相反,增强冷凝效果 |
D: 烧瓶内放些碎瓷片以免爆炸 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rOo5oSP6JK46aaP54On55O25LiN6IO955u05o6l5Yqg54Ot44CC
- 答案:Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.在蒸馏实验中,下列叙述不正确的是
A: 在蒸馏烧瓶中盛约体积的自来水,并放入几粒沸石 |
B: 将温度计水银球插入自来水中 |
C: 冷水从冷凝管下口入,上口出 |
D: 收集蒸馏水时,应弃去开始馏出的部分 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rip5bqm6K6h5rWL6YeP55qE5piv6JK45rG955qE5rip5bqm77yM5Zug5q2k5rC06ZO255CD55qE5L2N572u6ZyA6KaB5qC85aSW5rOo5oSP44CC
- 答案:Qg==
5Zyo6JK46aaP54On55O25Lit55ub57qmPGltZyB3aWR0aD03IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzgyLzg4L3JCQUNGRlg1SFBIQjdpQW9BQUFCTVdhWFdRMDk0MS5wbmciPuS9k+enr+eahOiHquadpeawtO+8jOW5tuaUvuWFpeWHoOeykuayuOefs++8jOmYsuatoua2suS9k+WJp+eDiOayuOiFvuW8lei1t+a2suS9k+mjnua6he+8jOaVhUHmraPnoa7vvJs8YnI+QuOAgeWwhua4qeW6puiuoeawtOmTtueQg+aUvuWcqOiSuOmmj+eTtueahOaUr+euoeWPo+WHuu+8jOa1i+mmj+WIhueahOayuOeCue+8jOaVhULplJnor6/vvJs8YnI+Q+OAgeWGt+awtOS7juWGt+WHneeuoeS4i+WPo+WFpe+8jOS4iuWPo+WHuu+8jOS9v+WGt+WHneaViOaenOWlve+8jOaVhUPmraPnoa7vvJs8YnI+ROOAgeS7quWZqOWGheepuuawlOS4reeahOadgui0qOS8muWtmOWcqOW8gOWni+iSuOmmj+WHuueahOmDqOWIhua2suS9k+S4re+8jOaJgOS7peaUtumbhuiSuOmmj+awtOaXtu+8jOW6lOW8g+WOu+W8gOWni+mmj+WHuueahOmDqOWIhu+8jOaVhUTmraPnoa7vvJs8YnI+5pWF6YCJQu+8jg==