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.测定空气里氧气含量通常使用的是
| A: 硫 |
| B: 木炭 |
| C: 红磷 |
| D: 蜡烛 |
一次做对，真牛！
+5奖励规则>
- 提示1：5rWL5a6a56m65rCU6YeM5rCn5rCU5ZCr6YeP77yM5omA6YCJ6Zmk5rCn5YmC6KaB5YW35aSH5Lul5LiL54m55b6B77ya5pys6Lqr6IO95aSf5Zyo56m65rCU5Lit54eD54On77yb5pys6Lqr55qE54q25oCB5Li66Z2e5rCU5L2T77yb55Sf5oiQ55qE54mp6LSo5Li66Z2e5rCU5oCB44CC
- 答案：Qw==
QeOAgeehq+WcqOepuuawlOS4reeHg+eDp+eUn+aIkOS6jOawp+WMluehq+awlOS9k++8jOiZvemZpOWOu+awp+awlO+8jOiAjOWinuWKoOS6huaWsOeahOawlOS9k++8jOS4jeiDveeUqOadpea1i+WumuepuuawlOS4reawp+awlOWQq+mHj++8jOaVhemAiemhuemUmeivr++8jjxicj5C44CB5pyo54Kt5Zyo56m65rCU5Lit54eD54On55Sf5oiQ5LqM5rCn5YyW56Kz5rCU5L2T5oiW6ICF5LiA5rCn5YyW56Kz5rCU5L2T55Sa6Iez5piv5Lik6ICF55qE5re35ZCI5rCU5L2T77yM6Jm96Zmk5Y675rCn5rCU77yM6ICM5aKe5Yqg5LqG5paw55qE5rCU5L2T77yM5LiN6IO955So5p2l5rWL5a6a56m65rCU5Lit5rCn5rCU5ZCr6YeP77yM5pWF6YCJ6aG56ZSZ6K+v77yOPGJyPkPjgIHnuqLno7flnKjnqbrmsJTkuK3nh4Png6fnlJ/miJDkupTmsKfljJbkuozno7flm7rkvZPvvIzog73pmaTljrvmsKfmsJTvvIzog73nlKjmnaXmtYvlrprnqbrmsJTkuK3msKfmsJTlkKvph4/vvIzmlYXpgInpobnmraPnoa7vvI48YnI+ROOAgeicoeeDm+WcqOepuuawlOS4reeHg+eDp+eUn+aIkOS6jOawp+WMlueis+awlOS9k+WSjOawtOiSuOawlO+8jOiZvemZpOWOu+awp+awlO+8jOiAjOWinuWKoOS6huaWsOeahOawlOS9k++8jOS4jeiDveeUqOadpea1i+WumuepuuawlOS4reawp+awlOWQq+mHj++8jOaVhemAiemhuemUmeivr++8jjxicj7mlYXpgInvvJpD77yO
本课配套习题挑战模式2/5
多选题
难度系数：
2.用如图所示装置来测定空气中氧气的含量，对该实验认识错误的是
| A: 铜粉用量的多少，不会影响实验结果 |
| B: 实验结束后冷却到室温才能读数 |
| C: 气球的作用是调节气压，使氧气完全反应 |
D: 在正常操作情况下，反应结束后消耗氧气的总体积应该是反应前注射器内气体体积的 |
一次做对，真牛！
+5奖励规则>
- 提示1：5Li65LqG5YWo6YOo5raI6ICX5o6J5rCn5rCU77yM6ZOc57KJ55qE6YeP5b+F6aG75piv6Laz6YeP55qE77yb
- 提示2：56m65rCU5Lit6Zmk5LqG5rCn5rCU77yb5Ymp5L2Z55qE5rCU5L2T5Li76KaB5piv5rCu5rCU77yM6L+Y5pyJ56iA5pyJ5rCU5L2T44CB5LqM5rCn5YyW56Kz562J77yM5Ymp5L2Z55qE5rCU5L2T6L+Y5piv5re35ZCI54mp77yb
- 提示3：5rCU5L2T55qE5L2T56ev6KaB5Y+X5rip5bqm55qE5b2x5ZON77yM6K+75pWw5pe25b+F6aG7562J5Yiw6KOF572u5Ya35Y206Iez5a6k5rip5YaN6K+777yO
- 答案：QSxE
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.如图装置常用来测定空气中氧气含量．下列对该实验认识正确的是
| A: 红磷燃烧产生大量白雾 |
| B: 实验中的红磷可用硫来代替 |
| C: 该实验能说明N2难溶于水 |
D: 红磷量不足会导致进入集气瓶中水的体积大于 |
一次做对，真牛！
+5奖励规则>
- 提示1：5omA6YCJ54mp6LSo6KaB5YW35aSH5Lul5LiL54m55b6B77ya77yIMe+8ieacrOi6q+iDveWkn+WcqOepuuawlOS4reeHg+eDp++8m++8iDLvvInmnKzouqvnmoTnirbmgIHkuLrpnZ7msJTkvZPvvJvvvIgz77yJ55Sf5oiQ55qE54mp6LSo5Li66Z2e5rCU5oCB77yO
- 提示2：57qi56O354eD54On5oqK5rCn5rCU6ICX5bC977yM5a6e6aqM5Lit5b2T6KOF572u5YaF6L+b5YWl5rC05Lul5ZCO77yM5Ymp5L2Z55qE5oiQ5YiG5Li76KaB5piv5rCu5rCU44CC
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.如图所示装置可用于测定空气中氧气的含量，下列说法中，不正确的是
| A: 实验时红磷一定过量 |
| B: 点燃红磷前先用弹簧夹夹紧乳胶管 |
| C: 红磷熄灭后立刻打开弹簧夹 |
| D: 最终进入瓶中水的体积约为氧气的体积 |
一次做对，真牛！
+5奖励规则>
- 提示1：6I2v5ZOB6KaB6Laz6YeP77yM5omN6IO95bCG5rCn5rCU5a6M5YWo5raI6ICX44CC
- 提示2：5rip5bqm5a+55rCU5L2T55qE5L2T56ev5Lya5Lqn55Sf5b2x5ZON44CC
- 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.如图是测定空气中氧气含量的装置，锥形瓶内空气体积为100mL，注射器中水的体积为25mL，该装置气密性良好．下列说法正确的是
| A: 白磷燃烧时产生白色烟雾 |
| B: 实验过程中气球始终变瘪 |
| C: 燃烧结束后立即打开弹簧夹 |
| D: 实验结束后，注射器中还剩约5mL水 |
一次做对，真牛！
+5奖励规则>
- 提示1：5rWL5a6a56m65rCU5Lit5rCn5rCU5ZCr6YeP5a6e6aqM55qE5a6e6aqM5Y6f55CG5piv5Zyo5a+G6Zet5a655Zmo5YaF5raI6ICX5rCn5rCU77yM5rWL6YeP5a655Zmo5YaF5rCU5L2T5L2T56ev55qE5YeP5bCR6YeP56Gu5a6a5rCn5rCU55qE5ZCr6YeP77yb
- 提示2：5rOo5oSP6KOF572u5LiN5ryP5rCU77yM6K+75pWw5pe25rip5bqm6KaB5Zue5Yiw5Y6f5p2l55qE5rip5bqm562J77yO
- 答案：RA==
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
