(ill) Nucoatent per unit Gaas in NH No
華中
育教 日九十月六年辰戊潛寬
1988中學會考
試題預習專欄
-0.35
香港參加坡題。
昨南華會辦柔道錦標賽,無限量級冠軍,男子組徐培榮(上),女子組盧燕玲(下)。二天將代表
七,奪得男于二百米
手巴安斯基则以廿八
*:* 中國能奪奧運多少金牌? 呆上十面望不
國運動員再奪十五枚金、雞水,是靠裁判合主脾運動等,再加上奥国 綠,是有希望的。但是觀的利分來計算成成的,乒賽不設動隨賽,單
直從實力來看,中葱說,一些項目如陸操小,可說已不存在什
,因此热判风水平的有項賽各國參賽選手人數
按商的主 操
化學建議答案
SUGGESTED SOLUTION TO CHEMISTRY
(a)(i) sheuld be in
Group VI.
(ii) X is à metal because
its oxide is busin,
metals because their oxides are anidic.
(iii) (1) Compound A
[ x ]2+
Compound :
2-
{2) A wealdjhave a higher m.11. because it is ionie and its ions are held together by. strong electro- static force.
(3) X acts as
reducing agent because it bus lost two electrona in
forming A
(iv). At high temperature;
X burns readily in
12X+YO→→2XU+Y
(b)(i) Lighting/Thunder-
storm.
Ng (8) + O2(K)
Znate)
ightning
· 280 ( r } +0g ( 2 ) *-*-*-*-*
2N0%(6)
4ND, {g} +2H20 ( f ) · ·
+02 ( 8 ) →→> 4UND; (£}
(11) (1) Haber Process.
- N2 ( 6 ) +3I1, (c) = 2N}
— 2NI13 (8)
5. (2) The thinpredical
vield can be increased
Iby a low
temperaturef because the forward
renction. iu exothermic. Lowering the
would shift the
temperature
equilibrium
the right.
position to
II. by a large
pressure: because the total volume of
the product is less than that
of reactants.
Increasing the prespiciones would shift the equilibrium position to the right.
14x2
N-content per unit
wuss in (ig)C03
14x2.
*!x(14+2)+12+16
0.47
Uro is the more
effective
Fertilizer,
|(u)(1) This is to reduce
the heat lost to the surrounding.
(ii)(1) A dibasic acid
has two
ioni sabfe hydrogen atomis per molecule.
(2) HQX+24n(17
NoyX+2H2O
(iii) fent is given oul
when neutraliza- tion is taking place. The more weid is added, the more heat is
liberated; no,
there is a rise in Lemperature at first.
The temperature of the reaction mixture will reach
maximes when an equivalent
mount of acid
has been added to the elkolí。
When neutralization
is complete, no more heat will be produced, 80, further addition
of the cald acid
will cause. n fall
in temperature.
(iv) 37.0°c.
(v) 43,0 cm3 of acid. (vi) Let Hà solution
hex mol.da-3 According to the equation below
HQX + 2Nailles HK
mol 2.mpl
1.e. n(x) Feeted
1.16 mol d
-Let this relative
molecular mans "of
patration of solution
100 ml d
96), de-3
(að algulated
gen-8&c
while vegetable
oka aro
liquids,
i.e. margarine
bes a higher melt- ing point than vegetable oils.
(iii) (1) X is hydrogen chloride gas. (2) 1.When X
disaelves in water, it ionizem to give hydrou iwe ions and chloride ions. When X
diauuiveain methylbenzene, it remains sy covulent
hydrogen
chloride molecnics.
2. Put a piezo
of dry pH
paper eac into the two
solution Aqueona
solution of
I would tura
it red while
solution of
benzene does not affect it at all.
(iv) Cly+2Ha(Hi
Na¢1+N®£10+10
Y can be used as a bleaching agent.
(v) on dissolving in
vater the s dissoçintesq give. Na and thes
Ft Lae # "bydrecerban tail", soluble in grease. or dirts, and an "ionic head", soluble in water, It low
the
報日僑
(vi} {1} Liquid Z is
concentra, ətl sulphuric acid, {27 ¥H250g+Cu:→ C¥S#2+20+50
X
(vii) add the 10 cm
iigurd Z slowly into 100 分类 water in a large beaker and stir continuously with
a glass rod antil ali
the liquid Z bas
been added. Wear
the safety goggles
in doing the dilutjun.
()() (1) The initial
rates of
reactio increases with the temperature. Curve AB has a kieaker slopr than the curve AD..
(2) The reaction
system has reached a equilibrium state,
and CB2(E)- (A) The forwarti
reaction is exothermic
ecause the
yield in lower at a higher Lemperature.
(hi) av aacrenwe in aike
amount of ce in the system will increase the yield of methanel
(iii)
because the will shift the equilibrium
position to the right.
Moler in mixture
surface testen of water and no 100 wate
wetting here.
it Alsolsifies
the grease or irte
by breaking op
the gruese and forming many "miscelles"
(a)(i) Gas X is sulphur
dioxide.
(ii) Chromium ho's ice U.. changed
1. (in Cr
earlier
400°C
reaching the equilibrium inter
{a}{i} »CH2CH=CKq
Time
(三) (1)
to
EaBeous Малорст
polypropane
(111) (1) White ash of
agnesium
oxide is formed.
(2) Yellow
particle of
sulphur ere
depaaited.
*(ag)+it* (aq) →→→→
(iv) HSU
ONE +50
148
.16
14.8 1:16 127,6
(b)(ii) During electry
the removal
Hions at the cathode would. leave behind the
Qa ions in the
solution from which
sodium hydroxide
cau be isolated,
(i) (1) Addition
reaction
Hydrogenation.
(2) Hargarine is a
像·第三:傳 交友鹼並 胖家學年於助敏黎榮津士博交 昨協年種一塾 李冠士 流相就兩魁生後主下前有文湘譽先及 謝卡於會 安要單一有 其軍中軍爲市 約+若欲地共一本月往及、紀絕生南 就舉徵海學 太——界浩輸由 宿断是利·摩是冠政 親橙的美文同同费正美 艾她念爲相華 他英文港生 平九徽美塔南 如丝港豬 的就亞局 善行美國化生起絕 在
台湾拉塞
二院朱打水,郭。为生,活互興計 她爲十憾太五水得福 游焰特打蜜化|頒化阻與
→HRO+S
(v) Solid Y is squium
bydrogen sulphite. Gas X (502) reacts with all to fore godium sulphite
Jormal sala)。
ExceX the
converts Nu
Nase, Lan seid
leat
water
(2) Toxic fumer
are given off. Thus, it is better to
carry out
the experiment
in the fume cužiboard.
(1) (1)
G
HE
11
K
(2) Thermopla
(b)(i) Hottle A
hydroxide.
dilute sulphuric acid.
一期星 日一月八(八八九一)年七十七國民華中
2:44 2: (2x275.9)
0.92 €
( 8 )
Xona
cratajua
concentrated
sitric acid,
Bottle containe
dilute sodium
Hottle CanLIIMA
(ii) M{KOH)=56 g mol-1
Ancurding to the equation below,
have not all
been
precipitated,
The fint
portion
indicates Lint
qulphate ions (50,**) has
been
precipitated,
(ii) The reagi ar ie 18.0 ca
Bottle D contains
dilute t chloride.
(ii) Teal I
Copper is oxidized by cone, ND to
copper(I) oxide which reacts with excess IIND to give copper(II) nitrate solution
(b)ue in colour). UNOZ is reduced,
giving off brown fumes of
nitrogen(IV) oxide,
Cu» 4 UNO -→→→ Cu(NO3)2 + 2H2O + 2N02
solution
brown?
fume a
anta
TEALI Copper(II) ions are precipitated by the nydroxide ions to forti blusb-white
-precipitate of
capper(11)
hydrsxide.
blush-whit
ppt.
Test ITI Copper(II)
hydroxide is a hase and hence neutralizes the dilute sulphuric avid..
{0}{i} M(LIOB)
PUBLIC
(5) heat the uned
polymer to
melt und would the molten
赛文徵流交化文生學美港 獎嚳榮颁貘戈黎校珊檬黄
是
爾齐該證內庭家國美於居班二十請升國美赴 大溪 文與雷廷版的期二合中国的最医生等由。在交八 軍季亞冠獲分偉大劉華結未信中符
節 名大華亞澄奕播,化立年黄了线的一班 餐洋生活高居 傳訪中流八共族合程
St. Louis Group Of Schools
聖類斯教育機構
英文夜中學招生
班
荃灣校
;黃長諾院美生協官中 王凡院;朱道
仁~天院施赤提
八两√锡住区;;說明 荃 十数英点一士忌供其妮官中
陳氏教育機構屬校
註冊不牟利新制中文中學
深水埗中學 招生通告
中一至中三各級插班生。
級:F. 4及F.5(文、理班 ) 開課日期:1988年9月2日
中四、五文理商組及中五重讀生。 三、一年制預料及文憑班
報名地點:1荃灣海濱花園第二期T15-T22
2 美孚百老滙街80號
3本機構港九各分校
查詢電話:0-4161375,3-7422028 址:地利亞修女紀念夜校(荃灣)
荃灣海濱花園第二期T15-T22
校
中大文理組二、商業文憑班 台大文喔租
艾班 ※盛組分別保遞參加高等程度試,台大聯零、100) DTMAN試,成親進水準,並由本校提予文憑。
※本校遞照收写客最新课程及方针:
【初中銀銷教學並加強英文燦接:
[高中 文組中文馮主、英文為網;理組中英並用;錢
「預科!驗多元化為用科目,以遞應不同升學就業需要。 ※除設一股仼課程外,體育,普通話、公民教育與應育為各 各規共同必修,並另設高機體哥、滿藝、人際關磁挙等 科自供同學選您。並輔以有計劃之課外活動,以協助可變 發展潛能...
中一、中四、中六級(包括中五盤鎖),溫經核測 或會考成鹅申請,系考取試。其餘商機,須痿加 入學考試。台大文理組,商業,設計文暴班憑跟成
表申請
九龍深水埗界限街七十一號 3-805200 305209
23.9 g mol M(Cip)=44 & mol ~1 According to the equation below,
LIBR
21.100
.. 12x23.9)
榮譽獎,由市局議員邪志他的財。
「港學生文化交流」界徵文比賽我滿
深水埗黃棣珊紀念中學黎文「左一
44 R
2kuk
+
(2x50) 5
0
2 A
到
y:44=1:(2x56)
2x5h
(iii) The same many of Lion will absorb a greater amount of Coy than KOH.
3.
(iv) Total vol, of GO
exhaled
592x4x7 =1456 dm3 According to the
#quation below,
+
14056 dm3
24 dm3
2x23.9)
7:(2x23.9)=14056:24 14056(2x23.9) -27499 €
ig to reGOVE any water attach- onto the precipitate.
F(1) The graph is
shown as below.
, 1k
15
24 25
T. THIN 1 Pu Le
你
50
*100*-05 -0.0025 mel
(v) (metal ions)
(metal nitrate) required for
crpinte precipitation
4
-2.52x10-3 ol
(vi; u(metal ions):
wis0, 2-
=2 52x10-3;2.5×10−3
1:1
Hence, the formula of the precipitate
(b)(i) By crucking, the
larger aolecules can be broken down into the
emeller cakerules.
(ii) A has a molecular formula C1R,
716
(ii) (1) The "vasaturated
hydrocarbon 18 U hydrocorhon containing one or more carbon- carbon miltiple bonds (1.
C-C double bond or triple bond).
(2) B has the
structural formula CI_CH=CHI
(3) B can be used
to make polymers.
(iv) Pass A an
separately Into Come Dr. Holutio in tetrachloroë methane. B will decolourize Bra solution while A
new not.
[CH=CH=€lly+Brg->Cl-,CHCilyAr
ዜ
v) A would have a higher boiling. paint because A
has a larger mole-
cular ass than
B, thus having a stronger inter-
molecular forces.
[(e)(i) €u{a)»#Ag*(84) —
2Ag(s)+?u**(aq)
(2) There is at
breathi
劃計費學免減署教 助資供提生中高為
免全及免三之分四免半分度幅免滅 話請申新重須者受接讀緇欲免減獲已
學士中年,在學 減校 將學的一至半生學提况中
必新婚证。塡費“人發,免,和供有四通 多面費 床、九再年 明贲 的免生家分 球四你可有骥助正中免港
六年女業八中 學年邀請向收幅之免請府 短菜
要快表學入,三輕族的及的麻子型
让機 領學囘。索 西 根及分 學校將生
St. Louis Group Of Schools
聖類斯教育機構
招收男女生
(一)英文中學
F.1-F.3
F.4-F.5{交、理、商組) (二)英專課程
文理
}
華僑教育
預耕灭校
1988-89 學年招生通告
新生報名、註冊:
|辦公時間:星期一至五:2.00 5.00p.m.
星期六
6.30-8.30 p.m.
: 6.30-8.30 p.m.
【課程:本校開設下列課程10000
-(-)香港高級程度會考文、理各科。
(二)香港高等程度會考文、理各科。
P.4-P.6.
(半年升级制) F.1-F.4 F.5(一年制)
(三)大普通教育文憑高級程度及
普通程度文、理各科:
香港西區第三街179號 5-489905 香港西區山道38號 5-487188 香港華盛寳華藏 55號 5-513501- 香港灣仔駱克道237 號 5-720256 香港太古城地利眍預料夜班 5-681134 九龍學老灌街 80 號 3-7439313 九腥寳塘協和街221/223號 3-893269 九龍官塘月華街 19 號 3-422289 九般荃灣海濱花團第二期T-15-T22 3-7439313
電腦科 本校開設之科,課程除適合學生投考 G.C.F.O.L. Computing Studies A.L
Computing Science 外,亦適合彼等升學 及就業之用。本校有設備優異之電腦室供 教學及學生實習之用。
(三)高級程度科目:八月四日(星期四) (二)高等程度、高級程度第一年、普通
程度科目:九月三日(星期六) 校址:九龍新蒲崗景福街5號 電話:3-289957, 3-289958
No comments yet.
Private notes are available after approval.