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| 兔仔誕生日期XD:2008 年 12 月 8 日 星期一 |
| Chemicay-Installation of Catalytic Converter in Car Exhaust |
兔仔分佈地區XD: 每週一篇 |
1. Which of the following gases has the greatest percentage by volume in car exhaust?
C.nitrogen
2. In Hong Kong, which of the following pollutants can be found in car exhaust?
1) nitrogen oxides 2) sulphur dioxide 3) carbon dioxide 4) carbon monoxide
B.1) and 4) only
3. Which of the following points are the advantages of using unleaded petrol?
1) The car will have a greater power.
2) Cars can install and use catalytic converter.
3) It can reduce the lead pollutants in car exhaust.
4) It can reduce the cost of petrol
B. 2) and 3) only
4. Nitrogen and oxygen cannot react to form nitrogen oxides in the atmosphere because
D. the temperature is not high enough for them to react.
5. The catalysts are supported on a honeycomb structure” is for
A. increasing the surface area for the pollutants to react
Never frown, even when you are sad, because you never know who is falling in love with your smile.
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| 誕生時間XD：2008-12-08 08:53 PM [ 訪客留言(0) ] [ 編輯日誌 ] [ 分享至FACEBOOK ] |
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