本课配套习题挑战模式1/5
多选题
难度系数:
1.碘是人体必需的元素之一,海洋植物如海带、海藻中含有丰富的、以碘离子形式存在的碘元素.在实验室提取碘的过程中,可供选择的有机试剂是
A: 酒精 |
B: 醋酸 |
C: 四氯化碳 |
D: 苯 |
一次做对,真牛!
+5奖励规则>
- 提示1:6JCD5Y+W55qE5Z+65pys5Y6f5YiZ5Lik56eN5rq25YmC5LqS5LiN55u45rq277yM5LiU5rq26LSo5Zyo5LiA56eN5rq25YmC5Lit55qE5rq26Kej5bqm5q+U5Zyo5Y+m5LiA56eN5aSn55qE5aSa
- 答案:QyxE
5a6e6aqM5a6k5Lit5bi455So55qE6JCD5Y+W5Y2k57Sg55qE6K+V5YmC5Li65Zub5rCv5YyW56Kz5oiW6ICF6Iuv44CC5Y2k57Sg5Zyo5LuW5Lus5Lit55qE5rq26Kej5oCn5q+U5Zyo5rC05Lit55qE5rq26Kej5oCn5aSn77yM5LiU5rC05LiO5Zub5rCv5YyW56Kz5oiW6Iuv6YO95LiN5LqS5rq244CC5pWF6YCJ5oupQ++8jETkuKTpobnjgII=
本课配套习题挑战模式2/5
单选题
难度系数:
2.实验室从海带灰中提取碘的操作过程,仪器选用不正确的是
A: 称取3g左右的干海带--托盘天平 |
B: 灼烧干海带至完全变成灰烬--蒸发皿 |
C: 过滤煮沸后的海带灰水混合液--漏斗 |
D: 用四氯化碳从氧化后的海带灰浸取液中提取碘--分液漏斗 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Y+v55So5omY55uY5aSp5bmz57KX55Wl56ew6YeP5bmy5rW35bim77yM54G854On5Zu65L2T5bqU5Zyo5Z2p5Z+a5Lit6L+b6KGM77yb
- 提示2:55So5ryP5paX6L+H5ruk5rWK5ray77yM6JCD5Y+W5ZCO55qE5ray5L2T5re35ZCI54mp55So5YiG5ray55qE5pa55rOV5YiG56a744CC
- 答案:Qg==
Qe+8jueyl+eVpeensOmHj+W5sua1t+W4puWPr+eUqOaJmOebmOWkqeW5s++8jOaVhUHmraPnoa7vvJs8YnI+Qu+8jueBvOeDp+WbuuS9k+W6lOWcqOWdqeWfmuS4rei/m+ihjO+8jOiAjOWKoOeDrea2suS9k+WPr+eUqOiSuOWPkeeav++8jOaVhULplJnor6/vvJs8YnI+Q++8jui/h+a7pOeFruayuOWQjueahOa1t+W4pueBsOawtOa3t+WQiOa2suWPr+eUqOa8j+aWl+WIhuemu++8jOaVhUPmraPnoa7vvJs8YnI+RO+8juWbm+awr+WMlueis+S4juawtOS6kuS4jeebuOa6tu+8jOWPr+eUqOWIhua2sua8j+aWl+i/m+ihjOWIhua2su+8jOaVhUTmraPnoa7vvI48YnI+5pWF6YCJQu+8jg==
本课配套习题挑战模式3/5
单选题
难度系数:
3.从海水中提取碘单质的过程中,不涉及的过程是
A: 过滤 |
B: 萃取 |
C: 沉降 |
D: 蒸馏 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zue5b+G56KY5Y2V6LSo55qE5o+Q5Y+W6L+H56iL77yM5b6I5a655piT6YCJ5Ye6562U5qGI
- 答案:Qw==
PGltZyB3aWR0aD0zOTEgaGVpZ2h0PTEzMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0YwLzc4L3JCQUNGRlVzY3N2UTNZcjVBQUFZMVZrQ01RbzgyOS5wbmciPjxicj7moLnmja7kuIrov7Dov4fnqIvvvIzlj6/ku6XmmI7mmL7nmoTnnIvliLDmlbTkuKrov4fnqIvkuK3lubbmsqHmnInmsonpmY3ov5nkuIDmk43kvZzjgII8YnI+5pWF6YCJ5oupQ+mhueOAgg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.溴、碘主要存在于海水中,有“海洋元素”的美称.从海水中提取碘的途径如下所示:
A: 碘元素在海水中也有游离态存在 |
B: 在提取的过程中用的氧化剂可以是H2O2 |
C: 操作A是结晶或重结晶 |
D: B是提纯操作,常用蒸馏或分馏 |
一次做对,真牛!
+5奖励规则>
- 提示1:56KY5YWD57Sg55qE5Y2V6LSo5Li65Zu65L2T54q25oCB77yM5pi+54S25Zyo5rW35rC05Lit5LiN5Lya5Lul5ri456a75oCB5a2Y5Zyo44CC
- 提示2:5LuO5rq25ray5Lit6I635Y+W5Y2k57Sg5Y2V6LSo55qE5pa55rOV5Li66JCD5Y+W44CC
- 提示3:5rOo5oSP56KY5Y2V6LSo5a655piT5Y2H5Y2O44CC
- 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.从海带中提取碘的实验过程中,涉及到下列操作,其中正确的是
A: 将海带灼烧成灰 |
B: 过滤得含I-溶液 |
C: 放出碘的苯溶液 |
D: 分离碘并回收苯 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rOo5oSP5Luq5Zmo55qE6YCJ5oup44CB5a6e6aqM55qE5Z+65pys5pON5L2c562J44CC
- 提示2:6Iuv55qE5a+G5bqm5q+U5rC05bCP44CC
- 答案:RA==
Qe+8juS4jeiDveWcqOeDp+adr+S4remrmOa4qeeBvOeDp+WbuuS9k++8jOeDp+adr+aYk+eCuOijgu+8jOWbuuS9k+eahOeBvOeDp+W6lOWcqOWdqeWfmuS4re+8jOaVhUHplJnor6/vvJs8YnI+Qu+8jui/h+a7pOW6lOeUqOeOu+eSg+ajkuW8lea1ge+8jOmYsuatoua1iua2suWklua8j++8jOaVhULplJnor6/vvJs8YnI+Q++8juiLr+eahOWvhuW6puavlOawtOWwj++8jOW6lOS7juS4iuWPo+WAkuWHuu+8jOmYsuatouaxoeafk++8jOaVhUPplJnor6/vvJs8YnI+RO+8jueimOaYk+WNh+WNju+8jOiSuOmmj+aXtu+8jOWGt+WHneeuoeW6lOS7juS4i+err+i/m+awtO+8jOS4iuerr+WHuuawtO+8jOaVhUTmraPnoa7vvI48YnI+5pWF6YCJRO+8jg==