中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.蒸发时，下列说法正确的是
| A: 等到蒸发皿中出现较多固体时，停止加热 |
| B: 当蒸发皿盛满溶液时，用微火加热 |
| C: 将蒸发皿放在石棉网上，用酒精灯加热 |
| D: 在蒸发溶液时，为防止污染药品，一般不用玻璃棒搅拌 |
一次做对，真牛！
+5奖励规则>
- 提示1：6JK45Y+R55q/5LiN6ZyA6KaB5Z6r55+z5qOJ572R77yM5Y+v5Lul55u05o6l5Yqg54Ot44CC
- 答案：QQ==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.
实验室进行NaCl溶液蒸发时，一般有以下操作过程
①固定铁圈位置②放置酒精灯③放上石棉网④放上蒸发皿⑤加热搅拌⑥停止加热、余热蒸干
其操作顺序为
| A: ①②③④⑤⑥ |
| B: ②①③④⑤⑥ |
| C: ②①④⑤⑥ |
| D: ②①③④⑤ |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+57uE6KOF5Luq5Zmo5oyJ54Wn5LuO5LiL5b6A5LiK44CB5LuO5bem5b6A5Y+z55qE5Y6f5YiZ44CCPC9wPg==
- 提示2：PHA+6JK45Y+R55q/55qE5Yqg54Ot5LiN6ZyA6KaB5Z6r55+z5qOJ572R77yM5Y+v5Lul55u05o6l5Yqg54Ot44CCPC9wPg==
- 答案：Qw==
PHA+57uE6KOF5Luq5Zmo5pe26KaB5LuO5LiL5ZCR5LiK57uE6KOF77yM6YWS57K+54Gv5Zyo6ZOB5ZyI5ZKM6JK45Y+R55q/55qE5LiL5pa577yM5omA5Lul6KaB5YWI5pS+6YWS57K+54Gv77yb54S25ZCO5YaN5Zu65a6a6ZOB5ZyI77yM5pS+572u6JK45Y+R55q/77yb54S25ZCO5YaN54K554eD6YWS57K+54Gv5Yqg54Ot77yM5bm25pCF5ouM77yM5b2T5pyJ6L6D5aSa5pm25L2T5p6Q5Ye65pe277yM5YGc5q2i5Yqg54Ot77yM5YCf5L2Z54Ot6JK45bmy77yOPC9wPg==
本课配套习题挑战模式3/5
单选题
难度系数：
3.电影《闪闪的红星》中，为让被困的红军战士吃上食盐，潘冬子将浸透食盐水的棉袄裹在身上，带进山中．假如潘冬子在实验室中，欲从食盐水中提取出食盐，采用的最好方法是
| A: 过滤 |
| B: 萃取 |
| C: 蒸发 |
| D: 蒸馏 |
一次做对，真牛！
+5奖励规则>
- 提示1：5rOo5oSP6JK45Y+R5LiO6JK46aaP55qE5Yy65Yir44CC6JK45Y+R5piv5bCG5ray5L2T6JK45Y+R5o6J77yM5Ymp5L2Z5Zu65L2T44CC6ICM6JK46aaP5piv5oyJ54Wn5rK454K55LiN5ZCM77yM5YiG56a75Lik56eN5ray5L2T44CC
- 答案：Qw==
5bCG6aOf55uQ5rC06JK45Y+R5rC077yM5Y+v5Lul5L2/5rq25YmC55qE6LSo6YeP5Y+Y5bCR77yM6ICM6IO95L2/5rq25ray6L6+5Yiw6aWx5ZKM77yM57un57ut6JK45Y+R5bCx5Y+v5pyJ6aOf55uQ5p6Q5Ye677yO
本课配套习题挑战模式4/5
单选题
难度系数：
4.在粗盐提纯的实验中，蒸发时正确的操作是
| A: 把浑浊的液体倒入蒸发皿内加热 |
| B: 开始析出晶体后用玻璃棒搅拌 |
| C: 待水分完全蒸干后停止加热 |
| D: 蒸发皿中出现大量固体时即停止加热 |
一次做对，真牛！
+5奖励规则>
- 提示1：6JK45Y+R5pON5L2c5Lit5L2V5pe25YGc5q2i5Yqg54Ot5piv5bi46ICD5bm25LiU5a655piT5Ye66ZSZ55qE54K544CC
- 答案：RA==
Qe+8jueyl+ebkOaPkOe6r+aPkOe6r+aXtua1kea1iueahOa2suS9k+imgei/h+a7pOWQjuWGjeWAkuWFpeiSuOWPkeeav++8jOaVhUHplJnor6/vvJs8YnI+Qu+8juaekOWHuuaZtuS9k+WQjuS7jeimgeeUqOeOu+eSg+ajkue7p+e7reaQheaLjO+8jOebtOWIsOacieWkp+mHj+WbuuS9k+aekOWHuuaXtuWBnOatouaQheaLjO+8jOaVhULplJnor6/vvJs8YnI+Q++8juiSuOWPkeeav+S4reWHuueOsOWkp+mHj+WbuuS9k+aXtuWBnOatouWKoOeDre+8jOaVhUPplJnor6/vvJs8YnI+RO+8juiSuOWPkeeav+WHuueOsOWkp+mHj+WbuuS9k+aXtuWBnOatouWKoOeDre+8jOeUqOS9meeDreWwhuWbuuS9k+iSuOW5su+8jOaVhUTmraPnoa7vvJs=
本课配套习题挑战模式5/5
单选题
难度系数：
5.下列物质可按溶解、过滤、蒸发的操作顺序，将它们分离开的是
| A: 酒精和水 |
| B: 氯化钾和二氧化锰 |
| C: 氯化钠和硝酸钾 |
| D: 铁粉和铜粉 |
一次做对，真牛！
+5奖励规则>
- 提示1：4oCc5rq26Kej44CB6L+H5ruk4oCd6L+Z5Lik5Liq5pON5L2c5LiA6Iis5piv55So5p2l5YiG56a76Zq+5rq25LqO5rC055qE54mp6LSo5LiO5piT5rq25LqO5rC055qE54mp6LSo77yM6L+H5ruk5ZCO5b6X5Yiw55qE5riF5ray5Li65piT5rq25LqO5rC055qE54mp6LSo55qE5rC05rq25ray77yM57uP6L+H6JK45Y+R5bCx5Y+v5Lul5b6X5Yiw44CC
- 答案：Qg==
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
