本课配套习题挑战模式1/5
单选题
难度系数:
1.关于过滤操作的描述,不正确的是
A: 滤纸应紧贴漏斗内壁并用少量水润湿,使滤纸与漏斗壁之间没有气泡 |
B: 漏斗内的过滤液的液面应高于滤纸边缘 |
C: 要沿着玻璃棒慢慢向漏斗中倾倒过滤液 |
D: 漏斗下端管口应紧靠烧杯内壁 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zyo6L+H5ruk5a6e6aqM5Lit77yM6KaB5rOo5oSP4oCc5LiA6LS05LqM5L2O5LiJ6Z2g4oCd44CC
- 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.以下过滤操作中,不正确的是
A: 滤纸应紧贴漏斗内壁并用少量水润湿,使滤纸与漏斗壁之间没有气泡 |
B: 漏斗下端管口应紧靠烧杯内壁 |
C: 倒入漏斗的过滤液的液面应高于滤纸边缘 |
D: 要沿着玻璃棒慢慢向漏斗中倾倒过滤液 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zyo6L+H5ruk5a6e6aqM5Lit77yM6KaB5rOo5oSP4oCc5LiA6LS05LqM5L2O5LiJ6Z2g4oCd44CC
- 答案:Qw==
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
本课配套习题挑战模式3/5
单选题
难度系数:
3.下列实验操作中属于过滤的是
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:6L+H5ruk5piv5Zu65ray5YiG56a755qE5LiA56eN5pa55rOV44CC
- 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.过滤时不需要的玻璃仪器是
A: 烧杯 |
B: 玻璃棒 |
C: 漏斗 |
D: 试管 |
一次做对,真牛!
+5奖励规则>
- 提示1:6L+H5ruk55qE6KOF572u5aaC5LiL77yaPGltZyB3aWR0aD01OCBoZWlnaHQ9MTIwIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQkMvMzQvckJBQ0oxWDVFenl6eW01R0FBQU84Mi1yM3FvMDczLnBuZyIgPg==
- 答案:RA==
6L+H5ruk6ZyA6KaB55qE5Luq5Zmo5pyJ77ya54On5p2v44CB546755KD5qOS44CB6ZOB5p625Y+w44CB5ryP5paX77yb54On5p2v55So5p2l55ub5pS+5ray5L2T77yM5ryP5paX55So5LqO6L+H5ruk77yM546755KD5qOS55So5p2l5byV5rWB5ZKM5pCF5ouM77yMPGJyPuaJgOS7peS4jemcgOimgeivleeuoQ==
本课配套习题挑战模式5/5
单选题
难度系数:
5.在粗盐提纯实验中,下列操作正确的是
A: 为加快过滤速度,用玻璃棒在漏斗中进行搅拌 |
B: 过滤时,漏斗中液体的液面应低于滤纸边缘 |
C: 蒸发时,有晶体析出后就不用玻璃棒搅拌 |
D: 当蒸发皿中液体全部蒸干后,才能停止加热 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY5LiN5LuF6ICD5p+l6L+H5ruk55qE5pON5L2c77yM6L+Y5raJ5Y+K57KX55uQ5o+Q57qv55qE5YW25LuW5pON5L2c44CC5L2G5piv5Y+v5Lul5qC55o2u6L+H5ruk5pON5L2c55qE6KaB5rGC5b6X5Ye6562U5qGI44CC
- 提示2:6L+H5ruk6L+H56iL5Lit5YWz5LqO5ruk57q455qE5L2/55So6KaB5rOo5oSP5LqM5L2O44CC
- 答案:Qg==
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