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2011 GCE O Level Chemistry P2 (Pure) Suggested Solutions

[06:30pm]饿了, 得吃饭, 今晚还有两节课要上. 所以估计得蛮晚的.  抱歉..

点击以下链接 查看O水准其他科目答案.
English Paper 2      
E Math Paper 1      E Math Paper 2      
A Math Paper 1      A Math Paper 2
Pure Physics Paper 1            Pure Physics Paper 2  
Pure Chemistry Paper 1        Pure Chemistry Paper 2  
Combined Chemistry Paper 1 (MCQ)      Combined Science Paper 2 (Physics)      Combined Science Paper 3 (Chemistry)

[10:30pm] 边做边上传中…


额~。。。。不是吧~。。。。:L


10点能出吗?


建议大家早点休息先, 明天看答案. 我得花一个小时做题. 还没看过试卷.


谢谢老师 老师的努力 我们看得见


额~ 多谢了啊~:lol
明天和物理一起公布吗?
对了地理有吗:L:L


老师,我是纹赫,我的化学P2大概在58-60左右,是不是连A2都保不住了,我已经不求A1了,如果连A2都保不住,是不是连B3也有可能甚至是C。。。  因为大家说卷子很简单,但我不觉得,感觉一般,中等!P3考过了,心里大概也有了底,大概在27-28/40分左右,这样下去,是不是真的保不住A了?看样子要来年继续了。。。。顺便问下,明年教育部是不是改Syllabus啊?(2012-2016)这样子不是今年考得都作废了吗?不可以保留了??一切都是未知。。。。:'(


我也觉得不容易
不过我P3应该接近满分


谢谢老师了,辛苦了!

请问A7 (c)可以写UO2吗


A7(c) 应该是UO2吧。因为是Uranium(IV) 老师把IV看成V了吧! 反正多谢答案!


老师,8(c)可以写 Si 4+ O2-么


你说的没错, 看错了.


谢谢老师,辛苦了~


不可以, Si 和 O 都是non-metal, 他们是以covalent bond 结合在一起的, 所以不能分开.


郁闷 我也 看错


多谢
可能想太多了 因为potassium chloride是离子形式出现的 所以以为没有结合…


老师你好,有几个问题想问问我这样写能得分不,大家谁有空也帮我看看谢谢
2(a)(ii)compound only consists of one kind molecule but mixture consists of atoms or molecules
c(ii)apply damp blue litmus paper into the gas if it is bleached ,the gas is chlorine
(iii)H2so4 ionise more hydrogen ions in soultion ,hence the concerntration of H+ ions will increase which increase the rate of reaction
3(c)(ii)calcium carbonate reacts with surfuric acid to form a layer on the surface of calcium carbonate ,which prevent beneath caclium carbonate reacting

4(a)Diamond has giant covalent structure ,the force of attrctions bettwen atoms is very strong ,hence ot is hard
6(a)they have common formular

(c)hexene and cyclohepatne have the common morlecular formula CnH2n hence percentage of carbon of them will be differnt from hexane ,which is alkane,has molecular formula CnH2n+2

10(a)addition polymers are formed by monomers join together to produce only one molecule but condensation polymers are formed by monomers join together by emmiting small molecules


哎呦!不错哦 我还没考o level 明年考 学哥学姐有什么好的办法能学好o level 呢??帮帮老弟了 谢谢!!!


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