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洁净的燃料——氢气 Flashcards

(13 cards)

1
Q

氢气的物理性质是什么?

A

氢气无色,无味,极难溶于水,密度比空气小,物质世界里最轻的气体。

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2
Q

氢气在空气中燃烧的现象是什么?

A

安静的人生,产生淡蓝色火焰,放出大量热,烧杯内壁有水珠。

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3
Q

不纯的氢气点燃会怎么样?

A

发生爆炸

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4
Q

检验氢气纯度的方法是什么?

A

收集一小试管氢气,用拇指堵住试管口,是试管口稍向下倾斜,接近酒精灯火焰,再移开拇指点火。

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5
Q

判断氢气是否纯净的标准是什么?

A

验纯时听到噗声则纯净,听到尖锐爆鸣声,则氢气不纯

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6
Q

氢气做燃料的优点有哪些?

A

热值高、燃烧物是水污染、制氢气的原料是谁,来源广泛。

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7
Q

实验室制备氢气的药品有哪些?

A

锌粒和稀硫酸。

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8
Q

实验室制备氢气时为什么不用稀盐酸?

A

因为稀盐酸具有挥发性,会发出。氯化氢使氢气不纯。

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9
Q

鉴别氢气、氧气、空气这三种气体,最简便的方法是什么?

A

将燃着的木条分别插入三种气体中。

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10
Q

在题目中看到超导体可以得到什么条件。

A

不计电阻。

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11
Q

金属氢是化合物还是单质?

A

单质

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12
Q

和充氢气相比,气球那充氦气的优点是什么?

A

不易爆

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13
Q

液氢的燃烧会产生雾霾吗?

A

不会

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