關於methane架..??(10分)

2006-10-20 4:04 am
Which of the following statements concerning methane is correct?

A) It burns with a smoky flame in air
B) It does not react with acids
C) It reacts with iodine readily
D) It is a liquid at room temperature and pressure


幫下我呀!!唔該呀~~

回答 (2)

2006-10-20 4:13 am
✔ 最佳答案
答案應該係b

a:因為methane既carbon chain唔長...所以under complete combustion唔會有smoky flame
b:orgainic solvent唔會同有pole既chemical react (大概意思係咁...我諗我表達上可能有d出入)
c:methane冇c=c double bond之類既野..即係佢係satisfy...所以o係standard condition唔會同iodine反應
d:冇記錯既話佢應該係gas黎架喇...

(供參考)
參考: 自己對中五所剩下既知識
2006-10-21 7:42 am
正確答案是B
methane的碳鏈短,燃燒得很完全,不會有黑煙,例如石油氣的燃燒是沒有黑煙的,石油氣的主要成分是methane
methane 和 iodine是沒有反應的。
methane 在室溫和一大氣壓是氣體


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