2002/1/16 (2002/4/28
)
New !!!! 1990 - 2001 Chem AL essay marking scheme(incomplete)
New !!!! 1995 - 1999 Chem AS-Level English Version Key
注意!以上ace檔需使用WINACE程式開啟
以上檔案並不涉及假權行為,因為全是重新製作的版本,如和真正考試局marking相同,實屬巧合
2001年傳聞 中國語文及文化科 卷一乙部等級分數轉換
E24 D30 C36 B42 A48
PMATH傳聞自1989年要C的分數 :
C: Paper 1
Paper2
89 59
58
90 54
62
91 52
55
92 53
51
93 45
50
94 46
55
95 45
55
96 57
52
97 46
52
98 57
58
2002 Use Of English Section C 出題來源 (partly)
http://www.renaissancemag.com/columnists/ridolfi/0500.asp
http://www.abc.net.au/triplej/morning/features/travel/default.htm#dis1
FORM 有關CHEM NEWSGROUP :
我問過一個好勁既chem teacher 佢有以下既 questions!
This year is more difficult than last year, especially the organic
btw, there are more mistakes in AL, please forward the following to
other
interested
Problems of the AL Chemistry 2002
Paper II
4(b)
Given: "Both MgO(s) and NaF(s) have a face-centred cubic structure"...
What's wrong: An ionic compound cannot have a face-centred cubic structure,
because it consists of at least TWO types of anions, so must be
interpenetrating lattices of face-centred cubic.
According the 1996 AL examininer's report, the student mixed up the
structure of a METAL (e.g. face-centred cubic) with the structure of
an
IONIC COMPOUND (e.g NaCl consists of interpenetrating face-centred
cubic
lattices of Cl- and Na+)
NOW the HKEA question got the SAME MISTAKES!
===============================
5(a)
Given: The question involves 1,6-dichlro-6-methylheptane which has
one
primary Cl & one tertiary Cl
What's wrong: The question is supposed to ask the student to give the
SN2
mechanism (RCl + HO-) for the formation of A in WATER with high [OH-]
and SN1 (RCl + H2O) for the formation of B, a simple question as it
supposed
to be!
BUT according the Solomons Organic Chemistry (a famous chem text in
university), 5th edition, p. 242
The SN2 mechanism should use a POLAR APROTIC solvent (no water!) with
high
[OH-]
QUESTION: how can A be formed by SN2 WITHOUT touching the tertiary Cl,
the
SN1 would have much higher rate than SN2 in water!!!!!
My answer would be: A is the same as B
both are 7-chloro-2-methylheptan-2-ol, formed by SN1
================================
6(b)
1st mistake: wrong pKb as mentioned in newspaper
2nd mistake: (ii) "Two electrodes are dipped into an aqueous solution
of G,
H and J maintained at pH 7, and are connected to the two poles of a
battery.
Which of these compounds, under such conditions, will remian almost
stationary? Explain your answer."
What's wrong: How can a molecule in water remain almost stationary?
There
must be Brownian movement in the solution!?
Obviously the question missed the important set-up of "filter paper
soaked
with electrolyte"
My answer would be: ALL are moving!!!
2002/4/24更新
網主發表 : 光是什麼一文 "原在http://www.exam-a.com"發表 ?
以網主A-LEVEL物理的知識說 :
光在宏觀角度是電磁波的一種
光在微觀角度是一種粒子,稱為光子
這種性質被稱為波粒二象性
光的形成是因為電子由高能階躍遷至低能階時放出的能量以光子形式排放出來,
這些光子如果是以可見光頻率放出來,則形式我們見到的可見光.
光是會受地心吸力影響,因此出現"黑洞", 而是否磁場影響,我就不知了.
2002/2/18
大家都知2001年化學會考文章題 , 網主幾經辛苦,終於找到 London GCE 的模擬試卷中,
其中刊載的文章題,以及評卷參考 , 請下載瀏覽.
● GCE AL Chem 文章題* [55kb]
2001/12/25
網主近日整理過往的筆記，現將部份會考程度的筆記以pdf形式放上網供大家下載及觀看 ．
●英文科Syll(B) PaperIV筆記*[270kb]
●化學科筆記（中三至中四程度）*[518kb]
●生物科筆記（中三）*[525kb]
●物理科光學重溫工作紙*[180kb]
2001/11/27(sunday)
*以上檔案均為pdf格式,需使用adobe reader開啟
請前往www.adobe.com不載此程式
●2001年七忠班時間表(pdf格式)*[12kb]