1/5单选题
难度：
1.用氢气流吹肥皂泡的实验主要说明了
| A | 氢气无色无味 |
| B | 氢气密度比空气小 |
| C | 氢气有可燃性 |
| D | 氢气有还原性 |
- 提示1：
- 5qC55o2u55So5rCi5rCU5rWB5ZC56IKl55qC5rOh55qE5a6e6aqM55qE546w6LGh5Yik5pat5rCi5rCU55qE5oCn6LSo77yM6Kej562U5pys6aKY55qE5YWz6ZSu5piv5oqT5L2P6IKl55qC5rOh5Zyo56m65rCU5Lit6L+F6YCf5LiK5Y2H55qE546w6LGh77yO
正确答案：Qg==
55So5rCi5rCU5rWB5ZC56LW355qE6IKl55qC5rOh5Zyo56m65rCU5Lit6L+F6YCf5LiK5Y2H77yM6K+05piO5rCi5rCU55qE5a+G5bqm5q+U56m65rCU5bCP77yO
2/5单选题
难度：
2.下列对于氢气在空气中燃烧的说法中，错误的是
| A | 氢气在空气中燃烧时，发出淡蓝色火焰 |
| B | 氢气燃烧时会产生浓烈的刺激性气味 |
| C | 氢气燃烧时会放出大量的热 |
| D | 氢气燃烧属于化合反应 |
- 提示1：
- 5qC55o2u5rCi5rCU5YW35pyJ5Y+v54eD5oCn77yM5Zyo5Zyo56m65rCU5Lit54eD54On5pe277yM5Y+R5Ye65reh6JOd6Imy54Gr54Sw77yM55Sf5oiQ5rC077yM57uT5ZCI6aKY5oSP6L+b6KGM5YiG5p6Q5Yik5pat5Y2z5Y+v77yO
正确答案：Qg==
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
3/5单选题
难度：
3.用排水法收集一瓶氢气，如图所示倒置于铁架台上，将点燃的蜡烛缓慢插入集气瓶中，瓶口有一团火焰，插入瓶中后蜡烛熄灭了．根据上述信息推测氢气的性质，不正确的是
| A | 氢气的密度比空气小 |
| B | 氢气具有可燃性 |
| C | 氢气不支持燃烧 |
| D | 氢气易溶于水 |
- 提示1：
- 5pys6aKY5Lit6aKY5bmy5L+h5oGv5rKh5pyJ5raJ5Y+K5rCi5rCU55qE5rC05rq25oCn44CC
正确答案：RA==
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
4/5单选题
难度：
4.检验氢气纯度时，判断氢气较纯的现象是
| A | 听到尖锐的爆鸣声 |
| B | 未听到声音 |
| C | 听到声音很小 |
| D | 试管爆炸 |
- 提示1：
- 5qC55o2u5qOA6aqM5rCi5rCU57qv5bqm55qE5pa55rOV5Y+K546w6LGh5Yik5pat77yO
正确答案：Qw==
5rCi5rCU5YW35pyJ5Y+v54eD5oCn77yM54K554eD5rCi5rCU5LiO56m65rCU77yI5oiW5rCn5rCU77yJ55qE5re35ZCI5rCU5L2T5Y+v6IO95Y+R55Sf54iG54K477yM5pWF54K554eD5YmN6KaB6aqM57qv77yM5qOA6aqM5pe26Iul5ZCs5Yiw5bCW6ZSQ55qE54iG6bij5aOw77yM5YiZ5rCi5rCU5LiN57qv77yM6Iul5ZCs5Yiw5aOw6Z+z5b6I5bCP77yM5YiZ5rCi5rCU6L6D57qv5YeA77yOPGJyPuaVhemAiUPvvI4=
5/5单选题
难度：
5.2008年的北京奥运会倡导“绿色奥运”，以氢燃料电池为动力的客车现正在北京的部分公交路线试运行。和普通客车不同的是，氢燃料客车运行过程中不排放任何有害气体，称为“雾排放”汽车。其原因是
| A | 氢气比空气轻 |
| B | 氢气有广泛的来源 |
| C | 氢燃烧时放热多 |
| D | 氢燃烧后只生成水 |
- 提示1：
- 5Lul5rCi54eD5paZ55S15rGg5Li65Yqo5Yqb55qE5a6i6L2m77yM5Zyo6L+Q6KGM6L+H56iL5Lit5LiN5o6S5pS+5Lu75L2V5pyJ5a6z5rCU5L2T
- 提示2：
- 5YW25Y6f5Zug5piv5rCi5rCU54eD54On5ZCO5Y+q55Sf5oiQ5rC077yM5rC06JK45rCU5rKh5pyJ5rGh5p+T77yO
正确答案：RA==
QeOAgeawouawlOavlOepuuawlOi9u+S4jeaYr+S4jeaOkuaUvuS7u+S9leacieWus+awlOS9k+eahOWOn+WboO+8juaVhUHplJnor6/vvJs8YnI+QuOAgeawouawlOacieW5v+azm+eahOadpea6kOS4juKAnOmbtuaOkuaUvuKAneayoeacieWFs+ezu++8juaVhULplJnor6/vvJs8YnI+Q+OAgeawouawlOeHg+eDp+aXtuaUvueDreWkmuS4juS4jeaOkuaUvuS7u+S9leacieWus+awlOS9k+ayoeacieWboOaenOWFs+ezu++8juaVhUPplJnor6/vvJs8YnI+ROOAgeawouawlOeHg+eDp+WQjuWPqueUn+aIkOawtO+8jOawtOiSuOawlOayoeacieaxoeafk++8juaVhUTmraPnoa7vvJs8YnI+5pWF6YCJRO+8jg==