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.在化学反应前后，以下各项一定不会发生变化的是①原子种类 ②元素种类 ③分子种类 ④物质种类
| A: ①② |
| B: ①③ |
| C: ②③ |
| D: ②④ |
一次做对，真牛！
+5奖励规则>
- 提示1：5YyW5a2m5Y+N5bqU5Lit55qE5YWt5LiN5Y+Y77ya5LiO5Y6f5a2Q5pyJ5YWz55qE5omA5pyJ6YeP77yM5LiO5YWD57Sg5pyJ5YWz55qE5omA5pyJ6YeP6L+Y5pyJ5Y+N5bqU5YmN5ZCO54mp6LSo55qE5oC76LSo6YeP44CC
- 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.化学反应前后肯定没有变化的是①原子数目；②分子数目；③元素种类；④物质种类；⑤原子种类；⑥物质的总质量．
| A: ①④⑥ |
| B: ①③⑤⑥ |
| C: ①②⑥ |
| D: ②③⑤ |
一次做对，真牛！
+5奖励规则>
- 提示1：5YyW5a2m5Y+N5bqU5Lit55qE5YWt5LiN5Y+Y77ya5LiO5Y6f5a2Q5pyJ5YWz55qE5omA5pyJ6YeP77yM5LiO5YWD57Sg5pyJ5YWz55qE5omA5pyJ6YeP6L+Y5pyJ5Y+N5bqU5YmN5ZCO54mp6LSo55qE5oC76LSo6YeP44CC
- 答案：Qg==
5YyW5a2m5Y+N5bqU5YmN5ZCO77yM5Y6f5a2Q55qE5pWw55uu5LiN5Y+Y77yb5YiG5a2Q55qE5pWw55uu5Y+v6IO95LiN5Y+Y77yM5Lmf5Y+v6IO95pS55Y+Y77yb5YWD57Sg55qE56eN57G75LiA5a6a5LiN5Y+Y77yb54mp6LSo55qE56eN57G75LiA5a6a5pS55Y+Y77yb5Y6f5a2Q55qE56eN57G75LiA5a6a5pS55Y+Y77yb54mp6LSo55qE5oC76LSo6YeP5LiA5a6a5LiN5Y+Y77yM6KeC5a+f6YCJ6aG577yM5pWF6YCJQu+8jg==
本课配套习题挑战模式3/5
单选题
难度系数：
3.纯净物M在密闭容器中微热就分解为NH3、H2O和CO2，根据这一实验事实能得出的结论是
| A: M由四种元素组成 |
| B: M的化学性质很稳定 |
| C: M中有氨气 |
| D: M可能是碳酸氢钠 |
一次做对，真牛！
+5奖励规则>
- 提示1：5pys6aKY6ICD5p+l55qE5piv6LSo6YeP5a6I5oGS5a6a5b6L55qE5bqU55So44CC5rOo5oSP5YWD57Sg5a6I5oGS77yM5Y+N5bqU5ZCO5pyJ55qE5YWD57Sg77yM5Y+N5bqU5YmN5LiA5a6a5pyJ44CC
- 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.某有机物在氧气中完全燃烧，只生成二氧化碳和水．由此推知该有机物
| A: 一定含碳、氢、氧元素 |
| B: 一定含碳、氢元素，可能含氧元素 |
| C: 只含碳、氢元素 |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：5pys6aKY6ICD5p+l55qE5piv6LSo6YeP5a6I5oGS5a6a5b6L55qE5bqU55So44CC5rOo5oSP5YWD57Sg5a6I5oGS77yM5Y+N5bqU5ZCO5pyJ55qE5YWD57Sg77yM5Y+N5bqU5YmN5LiA5a6a5pyJ44CC
- 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.高氯酸铵（NH4ClO4）可用作火箭推进剂，当它发生分解反应时，不可能生成的物质是
| A: CO2 |
| B: Cl2 |
| C: O2 |
| D: N2 |
一次做对，真牛！
+5奖励规则>
- 提示1：55Sx6LSo6YeP5a6I5oGS5a6a5b6L77ya5YyW5a2m5Y+N5bqU5YmN5ZCO5YWD57Sg5LiN5Y+Y77yb6auY5rCv6YW46ZO155qE5YyW5a2m5byPTkg8c3ViPjQ8L3N1Yj5DbE88c3ViPjQ8L3N1Yj7vvIzor6XnianotKjnlLFO44CBSOOAgU/jgIFDbOWbm+enjeWFg+e0oOe7hOaIkO+8jOWPjeW6lOWQjueahOWQhOeJqei0qOS4reS4jeiDveaciemZpOS6hui/meWbm+enjeWFg+e0oOS5i+WklueahOWFg+e0oOOAgg==
- 答案：QQ==
55Sx6LSo6YeP5a6I5oGS5a6a5b6L77ya5YyW5a2m5Y+N5bqU5YmN5ZCO5YWD57Sg5LiN5Y+Y77yb6auY5rCv6YW46ZO155qE5YyW5a2m5byPTkg8c3ViPjQ8L3N1Yj5DbE88c3ViPjQ8L3N1Yj7vvIzor6XnianotKjnlLFO44CBSOOAgU/jgIFDbOWbm+enjeWFg+e0oOe7hOaIkO+8jOWFtue7hOaIkOS4reS4jeWQq0PlhYPntKDvvJvmoLnmja7ljJblrablj5jljJbliY3lkI7lhYPntKDnp43nsbvkuI3lj5jvvIzogIzliIbop6Plj43lupTnmoTlj43lupTnianlj6rmnInkuIDnp43vvIzliJnlj6/liKTmlq3pq5jmsK/phbjpk7XliIbop6PkuI3lj6/og73kuqfnlJ/nlLFD44CBT+WFg+e0oOe7hOaIkOeahENPPHN1Yj4yPC9zdWI+77yOPGJyPuaVhemAiUHvvI4=
