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.古人所作字画仍不褪色，是因为墨汁中的碳
| A: 具有可燃性 |
| B: 具有还原性 |
| C: 具有氧化性 |
| D: 常温下稳定 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u6aKY5oSP77yM4oCc5LiN6KSq6Imy4oCd5bqU5b2T5LuO5LiN5piT5Y+R55Sf5Y+N5bqU5YWl5omL5YiG5p6Q44CC
- 答案：RA==
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本课配套习题挑战模式2/5
单选题
难度系数：
2.下列物质中，一定条件下不能与碳单质发生化学反应的是
| A: O2 |
| B: CO |
| C: CO2 |
| D: CuO |
一次做对，真牛！
+5奖励规则>
- 提示1：56Kz5Y2V6LSo5YW35pyJ5Y+v54eD5oCn5LiO6L+Y5Y6f5oCn44CC
- 答案：Qg==
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本课配套习题挑战模式3/5
单选题
难度系数：
3.下列关于碳的化学性质的描述中，正确的是
| A: 碳的化学性质很活泼 |
| B: 碳和氧化铜反应生成铜，说明碳具有氧化性 |
| C: 碳燃烧的产物一定是二氧化碳 |
| D: 碳与氧化铜的反应中，碳做还原剂，具有还原性 |
一次做对，真牛！
+5奖励规则>
- 提示1：5a+55LqO56Kz5Y2V6LSo55qE5YyW5a2m5oCn6LSo55qE5a6a5L2N5bqU5b2T5piv4oCc6L6D5Li656iz5a6a55qE4oCd77yM5bi45rip5LiL5LiN5LiO5YW25LuW54mp6LSo5Y+R55Sf5Y+N5bqU44CC
- 提示2：56Kz54eD54On55qE55Sf5oiQ54mp6ZyA6KaB55yL5rCn5rCU5piv5ZCm5YWF6Laz44CC
- 提示3：5b6X5Yiw5rCn55qE6KKr5rCn5YyW77yM5YGa5Li66L+Y5Y6f5YmC44CCIA==
- 答案：RA==
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本课配套习题挑战模式4/5
单选题
难度系数：
4.将装有黑色粉末的试管（试管内不含氧气）加强热后，有红色物质生成，同时产生一种能使澄清石灰水变浑浊的气体．则黑色粉末是
| A: 氧化铜 |
| B: 木炭粉和二氧化锰 |
| C: 木炭粉 |
| D: 木炭粉和氧化铜 |
一次做对，真牛！
+5奖励规则>
- 提示1：55Sf5oiQ55qE5rCU5L2T6IO95L2/5r6E5riF55qE55+z54Gw5rC05Y+Y5rWR5rWK77yM5YiZ5pyJ5LqM5rCn5YyW56Kz55Sf5oiQ77yb
- 提示2：5bi46KeB55qE57qi6Imy55qE57KJ5pyr5pyJ57qi56O344CB6ZOc44CB5rCn5YyW6ZOB562J77yb
- 提示3：5bi46KeB55qE6buR6Imy55qE57KJ5pyr5pyJ56Kz44CB6ZOB44CB5Zub5rCn5YyW5LiJ6ZOB44CB5rCn5YyW6ZOc562J562J44CC
- 答案：RA==
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本课配套习题挑战模式5/5
单选题
难度系数：
5.当氧化铜中混有少量木炭粉时，除去木炭粉的方法是
| A: 隔绝空气加热混合物 |
| B: 在氢气流中加热混合物 |
| C: 加水溶解、过滤 |
| D: 在氧气流中加热混合物 |
一次做对，真牛！
+5奖励规则>
- 提示1：5L2T57O75Lit5bey57uP5a2Y5Zyo55qE5piv5rCn5YyW6ZOc5ZKM56Kz5Y2V6LSo77yM6Iul6ZqU57ud56m65rCU5Yqg54Ot77yM5Lik6ICF5bCG5Y+R55Sf5rCn5YyW6L+Y5Y6f5Y+N5bqU44CC
- 提示2：6Iul5Zyo5rCi5rCU55qE546v5aKD5LiL77yM5rCi5rCU5Y+v5Lul5bCG5rCn5YyW6ZOc6L+Y5Y6f44CC
- 答案：RA==
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