问题 选择题

要除去混在一氧化碳中少量的二氧化碳,可采用的最好措施是(  )

A.点火燃烧

B.通入灼热的氧化铜粉末

C.通入石灰水中

D.通入石蕊试液中

答案

A、混合气体点燃,一氧化碳燃烧生成二氧化碳,没有将杂质除去,反而将原物质反应掉了,故A错误;

B、CO在高温下与氧化铜反应生成铜和气体二氧化碳,除去了CO而CO2没有除去,与题意不符,故B错误.

C、CO与石灰水不反应且不溶于水,而CO2与石灰水反应,化学反应方程式为:CO2+Ca(OH)2═CaCO3↓+H2O,除去了杂质CO2,净化了CO气体,故C正确.

D、将混合气体通入紫色石蕊试液中,二氧化碳与水结合成碳酸,而碳酸不稳定又会分解生成二氧化碳,不能将二氧化碳全部除去,故D错误.

故选C.

阅读理解

D

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Ariau Amazon Towers

The Ariau Amazon Towers hotel lets you sleep in a tree house. Eight towers make up this hotel that offers over 300 rooms. If you really want to get into the spirit, book the Tarzan suit which is large enough for a big family. You’ll be thirty feet up in the air and can travel between the towers through their wooden walkways.

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The Ice Hotel

Every winter in Jukkasjarvi, Sweden kind of hotel called the Ice Hotel is built Each year,world-famous artists are invited to design and produce works of art from the ice, many of which can be found in the rooms. You’ll have your choice between hot or cold romms,but you will be well advised to stay at least one night in a cold room for a true experience.

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Propeller Island

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For information about other cool hotels in the world ,visit the website:

http://www.bahamabeachclub.com

54.What is special about the Ariau Amazon Towers hotel?

A.You can sleep in the houses     B.You can choose any of the towers

C.It is designed for big families    D.Every room has a walkway

55.For two persons spending a night in one of these hotels,they have to pay at least

A.$111    B.$182    C.$600    D.$636

56.Which website should you visit if you want to find out whether there exists a hotel the sea?

A.http://www.icehotel.com    B.http://www.ariautowers.com

C.http://www .propeller-island.com    D.http://www.bahamabeachclub.com

57.Which hotel would invite artists to come to work every year?

A.Propeller Island City Lodge    B.Ariau Amazon Towers

C.The Ice Hotel               D.Bahama Beach Club

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