本课配套习题挑战模式1/5
单选题
难度系数:
1.有关铁与水反应的说法中,正确的是
A: 在任何条件下,铁与水均不发生反应 |
B: 在高温时,铁与水蒸气反应生成氢氧化铁和氢气 |
C: 在高温时,铁与水蒸气反应生成氧化铁和氢气 |
D: 高温时,铁与水蒸气反应生成四氧化三铁和氢气 |
一次做对,真牛!
+5奖励规则>
- 提示1:5bi45rip5LiL77yM6ZOB5LiO5rC06L+Z5Lik6ICF5piv5LiN5Y+R55Sf5Y+N5bqU55qE44CC
- 答案:RA==
5bi45rip5LiL77yM6ZOB5Y2V6LSo5LiO5rC06L+Z5Lik6ICF5LiN5Y+R55Sf5Y+N5bqU44CCPGJyPuWcqOmrmOa4qeadoeS7tuS4i++8jOmTgeS4juawtOiSuOawlOWPjeW6lOeUn+aIkOWbm+awp+WMluS4iemTgeS4juawouawlOOAguaVhemAieaLqUTpobnjgII=
本课配套习题挑战模式2/5
单选题
难度系数:
2.下列金属只能与高温水蒸汽反应而不与热水反应的是
A: Ca |
B: Mg |
C: Fe |
D: Cu |
一次做对,真牛!
+5奖励规则>
- 提示1:6Z2e5bi45rS75rO855qE6YeR5bGe5LiO54Ot5rC05Lmf5Y+v5Lul5Y+R55Sf5Y+N5bqU77yM6ICM5LiN5rS75rO855qE6YeR5bGe5LiO54Ot5rC05oiW5rC06JK45rCU6YO95LiN5Y+R55Sf5Y+N5bqU44CC
- 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.下列关于铁与水蒸气发生反应的说法中不正确的是
A: 反应中有氢气产生 |
B: 此反应需在高温下才能发生 |
C: 生成的铁的化合物中铁全部呈+3价 |
D: 该反应中水作氧化剂 |
一次做对,真牛!
+5奖励规则>
- 提示1:6YeR5bGe6ZOB5LiO5rC06JK45rCU5Y+N5bqU55Sf5oiQ5Zub5rCn5YyW5LiJ6ZOB5LiO5rCi5rCU44CC
- 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.铁不能与冷、热水反应,但能与水蒸气反应。下列有关该实验的说法不正确的是
A: 组装该实验装置用到的玻璃仪器可仅为一个酒精灯、一支大试管和导气管 |
B: 可通过加热湿棉花产生水蒸气 |
C: 可将产物之一通入肥皂液中用燃烧法检验 |
D: 铁粉与水蒸气反应后,可立即用磁铁将剩余铁粉分离出来 |
一次做对,真牛!
+5奖励规则>
- 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.铁与水蒸气反应的实验装置如图,下列说法正确的是
A: 实验室,试管口应高于试管底 |
B: 加热时试管内铁粉红热,点燃肥皂泡可听到爆鸣声 |
C: 反应的化学方程式为: |
D: 用盐酸溶解反应后的固体,向所得溶液中滴入KSCN溶液,未显红色,说明元反应未能发生 |
一次做对,真牛!
+5奖励规则>
- 提示1:5a+55LqO5Zu65L2T5Yqg54Ot55qE6KOF572u6YO95bqU5rOo5oSP6K+V566h55qE5pa55ZCR77yM5bqU5bCG6K+V566h5Y+j55Wl5ZCR5LiL5YC+5pac44CC
- 提示2:5Y+N5bqU5Ymp5L2Z5Zu65L2T5aaC5p6c5a2Y5Zyo6L+H6YeP55qE6ZOB77yM5bCx5pyJ5Y+v6IO95bCG5LiJ5Lu36ZOB6L+Y5Y6f5Li65Lqa6ZOB56a75a2Q77yM5piv55qES1NDTuS4jeaYvue6ouiJsuOAgg==
- 答案:Qg==
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