本课配套习题挑战模式1/5
单选题
难度系数:
1.将充满下列气体的四支试管分别倒立在水槽中,试管内水位上升最高的是
A: CO |
B: CO2 |
C: O2 |
D: CH4 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY6ICD5p+l5Yeg56eN5rCU5L2T55qE5rC05rq25oCn44CC5LqM5rCn5YyW56Kz6IO95rq25LqO5rC044CC
- 答案:Qg==
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本课配套习题挑战模式2/5
单选题
难度系数:
2.通常情况下,下列物质既不能燃烧,也不支持燃烧的是
A: H2 |
B: O2 |
C: CO |
D: CO2 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rCi5rCU5LiO5LiA5rCn5YyW56Kz5Y+v5Lul54eD54On77yb
- 提示2:5rCn5rCU5pSv5oyB54eD54On
- 答案:RA==
QeOAgeawouawlOiDveWkn+eHg+eDp+W5tuWPkeWHuua3oeiTneiJsueBq+eEsO+8jOaVhUHplJnor6/vvJs8YnI+QuOAgeawp+awlOWFt+acieWKqeeHg+aAp++8jOacrOi6q+S4jeiDveeHg+eDp++8jOS9huiDveaUr+aMgeeHg+eDp++8jOaVhULplJnor6/vvJs8YnI+Q+OAgeS4gOawp+WMlueis+iDveeHg+eDp+W5tuWPkeWHuua3oeiTneiJsueBq+eEsO+8jOaVhUPplJnor6/vvJs8YnI+ROOAgeS6jOawp+WMlueis+aXouS4jeiDveeHg+eDp+S5n+S4jeaUr+aMgeeHg+eDp++8jOaVhUTmraPnoa7vvJs8YnI+5pWF6YCJRO+8jg==
本课配套习题挑战模式3/5
单选题
难度系数:
3.超临界CO2流体是一种与水相似、能阻燃、溶解能力强的溶剂,被誉为“绿色环保溶剂”。下列有关它的说法错误的是
A: 它作为“绿色环保溶剂”能代替许多有害、有毒、易燃的有机溶剂 |
B: 超临界CO2流体是一种特殊的物质,带火星的木条可以在其中复燃 |
C: CO2是自然界中存在的物质,它参与自然界的碳元素循环 |
D: 超临界CO2流体与固体干冰的组成相同 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY55qE6Zq+5bqm5Zyo5LqO4oCc6LaF5Li055WM4oCd5LiJ5Liq5a2X44CC6L+Z5Liq54q25oCB5bm25LiN6IO95pS55Y+Y5LuW55qE57uE5oiQ4oCU4oCU5LqM5rCn5YyW56Kz44CC
- 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.有关二氧化碳的实验描述正确的是
A: 二氧化碳能使紫色石蕊试纸变红色 |
B: 因为二氧化碳密度比空气大,所以能像液体一样倾倒二氧化碳 |
C: 因为二氧化碳易溶于水,所以不能用排水集气法收集二氧化碳 |
D: 将燃着的小条伸入集气瓶中,若火焰熄灭,则该气体是二氧化碳 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rOo5oSP5LqM5rCn5YyW56Kz5pys6Lqr5bm25LiN6IO95L2/57Sr6Imy55+z6JWK6K+V57q45Y+Y57qi6Imy77yM6ICM5piv5LqM5rCn5YyW56Kz5LiO5rC05Y+N5bqU77yM55Sf5oiQ55qE56Kz6YW45Y+v5Lul5L2/55+z6JWK6K+V57q45Y+Y57qi6Imy
- 提示2:5LqM5rCn5YyW56Kz6IO95rq25LqO5rC044CC
- 提示3:5LiN5pSv5oyB54eD54On55qE5rCU5L2T5pyJ5b6I5aSa77yM5rOo5oSP5Yy65Yir5LqM5rCn5YyW56Kz55qE5qOA6aqM5LiOROmhueivtOazleOAgg==
- 答案:Qg==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.将干冰投入装水的玻璃瓶中时,发现水在剧烈“沸腾”,瓶口出现大量“白气”,此“白气”是
A: 干冰升华产生的大量白色二氧化碳气体 |
B: 干冰升华放热使水汽化形成的水蒸气 |
C: 干冰熔化吸热使空气中水蒸气液化形成的小水滴 |
D: 干冰升华吸热使空气中水蒸气液化形成的小水滴 |
一次做对,真牛!
+5奖励规则>
- 提示1:5bmy5Yaw5Li65LqM5rCn5YyW56Kz55qE5Zu65oCB77yM5LiA6Iis55u05o6l5Y2H5Y2O5Li65LqM5rCn5YyW56Kz5rCU5L2T44CC5L2G5LqM5rCn5YyW56Kz5rCU5L2T5peg6aKc6Imy
- 提示2:6ICD6JmR5bmy5Yaw54aU5YyW5ZC454Ot44CC
- 答案:RA==
6L+Z5Liq6L+H56iL5Li677ya5bmy5Yaw5Y2H5Y2O5Lya5ZC45pS25aSn6YeP55qE54Ot77yM5L2/5b6X56m65rCU5ZGo5Zu055qE5rC06JK45rCU5ray5YyW5oiQ5bCP5rC05ru077yM5Zug5q2k5Lqn55Sf4oCc55m95rCU4oCd44CC