1987-07-11 — Page 14

5日一十月七年七八九一曆公年六十七國民華中 育敎聞港

本港 新聞

·增設善美儀容護中心 黃大仙中心名髮廊擴張 鄭明明趙振國六人剪深

〔港訊》黃大仙中心名髮魔繽張,增設馳

[ 小姐,將工品廠董事趙長國光生,新豪華出暑期班,學生勢必鬍躍參加,學生家長擬送一可徒,

午、夜各班,供學生選擇,今週末班定於七 高班,學生之英文程度編班,務使學生易於「實踐力行,即 1,夜班,每週上課兩次,班级分闵班、中班、學,最後希望前途。葉方, |暑假期間壼璱英文基礎,設有上午班,下午班,深教育,只要繼續努力,定必事半功倍完成所 開班暑期英文進修班,以方便中小學生,利用業基礎,今後跟上中學里程,以至將來進修高 ┐每逢星期六上課一次,每次一時半,也有料、 動搖。但

·談校應學生及家長之要求,本年暑期繼續績,顯見六年來在良師教導下奠立了極佳的學 1月十八日開課,有意參加該班者,希留意。 畢業,又完成初級教育,畢業試卷上有優良成一 各位畢業同學,早已完成學前教育,今天

【開此班,學生肄業完畢,深感獲益不少,成一譚紹速勞德料兩位教育主任分别颁發各項成績 適應學習,該校過去數年來皆應學生家長之雙,词事,隨即頒發畢業證書。司徒與夫人及

▶松近該以送設成

潘藐姒院長為今年亞洲髪型大賽夢幻法說好。正校:旺角水渠道三八至四一號二樓(近 及院長潘燕娜小姐,主持偈慕劉綵儀式,場面死海思潤。梭現開始接受新生辦理入讀該」,後成,該校員生表演舞蹈,茶會欸特嘉賓。

·座名发配李雄榮的書,飯局議員補炳榮夫人有女往該校就讀該班,務須提早申請入學,以獎,司徒英主席致送紀念品與主體人并致敵爾 凱聲戲院,分校:旺角彌敦道六四四號四樓

「影」,著名專家相繼示範表演,潘燕聽副院長 軍,並即時安演得獎「一夜「魔幻魅

烕 司徒氏宗親會學校畢業典禮主啞人司

一般目作新娘化拒示痛,獲得在場觀衆,對校的四八號分徒領畢業證書(本報攝〕

鼎院長,明明小姐及薄榮太人。", "

•健左起:不繼榮伉,趙振國先生,潘燕

頁二第張四第

日六十月六年卯丁曆夏

WAH KIU YAT PO 報日僑華

六期星

夜間夜校譽八

多福年暑實

九期用

沙路

龍邊

回復平靜

·圖·文·郭立——

LATY TEK

,正當立法局好女 二時五十五分之間 攝於前日下午 安貝在橋上開會之

日在此住、食,抗酸。 昨日大改觀,市民樂於看到事件轉還 在此之前,這地方仍見亞伯瓶婆長時

實用英專日夜校

·英明日夜

可雅中放

,賓主盡歡 及各界友好、嘉賓,是晚筵開百席,場面熱闇 | 皇宮大酒樓全联聚行貿誕聯戲,招待全體員工 「錢離至爲重視,特於經期之日,假座港美心 恒基兆業地產有限公司,一世以來,對於先師

先師寶誕塲面》,《

圌示:恒基兆業地產有限公司慶祝魯班

恒基兆業地產公司

慶祝魯班先師寶誕 地均爲鲁班師父方

渲風兆菜地産有限公

愛心後人間,世界添光彩」殺案欸活動,揭

羅文牧師,假爝 商務二樓展镫廣場 「 及潘志輝議員,將會聯同香港世界宣明會總監 鴻燊博士,林錦光太平紳士,B烈科太平紳士。 七月十一日下午一時正,四位社會賢達何

中學人數,亦佔該網內總名額百分之十七强 該校網內總名額百分之十,而獲泵賽馬會工業 百分之二十。盡派瑪利諾修女書院人數,則佔 道官立學生人數,高至佔該兩學校網內總名額 官津名校。據統計眩校獲派喇沙柎院“及天光 部份學生,均能根據其第一、二志酒獲派著名 榜的中學學位分配考試中,獲得隨人成紙,大 ,天主教會聖若望英文裔院小學部在昨日放

信德商場愛心暖人間 宋代後表演歌舞

天主教聖若望書院

學位分配成績驕人

的十二位名間聯手合辦。 史丹福酒店港行,由香港十一家「最佳食府] 「世紀之宴」已於二十三日晚假新加坡威格 一化交流,其中「世纪之宴一页成功地推廣香港 「美食天堂」雜譽,獲星加坡飲食界一致好評 「香港名廚廚藝巡迴大展」促進了卷早飲食文 : 御鹿手世家市務董事梅偉財先生指出:

· 名廚藝巡迥大展世紀之宴在新加坡

椒譽歸來,爲香港飲食界寫下光 一頁。 廚藝巡迴大展」星馬訪問團,已大功告成,日 ::由御座干包世家主辦之第二屆「香港名廚

世紀之宴獲新加坡好評 名廚廚藝巡迴大展告成

CHINESE CU

BY HONG KONG)

BANQUET OF

ETURY

開序幕。並邀請到電視藝員魏瑪利小姐任大會 香港青年設計榮譽獎

(港訊)由香港工業總會轄下香港設計委

八七年比賽開始收件

中西區兒童合唱團,雅健體藝社,方方樂趣幼 放,此外,宣明會更邀請到多價表演刚磴li 剪綵儀式結束後,這鄉美食機場亦即開 雅園及歌展孫明光先生演歌舞節目。市民除,員會聯同教育署合辦的一九八七年香港青年没 可一邊享受美食,一邊做善事外,更可欣賞析 | 計榮譽樊比赛七月九日正式開始收件。截止收 件日期爲七月北一日,

司徒氏宗親會學校 十四週年畢業典禮,

∴C特,司徒氏宗親會學校(八)日下跌成就。 午三時舉行創校十四週年紀念傑八六——八七

凡年齡十五歲至廿五歲的青年,均可報名

此表暨香港年輕設計人士在立體設計方面的優

今年比賽獲得新華錫行香港分行資助。舉辦這 比賽,是旨在推動本港工業設計教育,並藉 ,香港青年設計榮譽獎比賽每年刑辦一次,

校監司徒華致開會醌稱:本屆上下午校畢,料不限;

實用業生共有二百三十六人,雖然新區學生普遍學生參加,參賽作品必須爲下列四類設計中之

張權、豬都一賽。比賽分兩組進行,甲組軾供十九至廿五

作建爐學學

一譽滿港九,更受海外僑胞推隶,現該校有正了骨,有时都由民國難。说

八年,迄今已近三十年之久,作育英才無數,築師,博學多才、人生經驗豐富,同學們可作 模型,連同設計圖樣及示意圖,一併送交收件

· 暑期英文補習班 於一九五 稱告慰。他又介紹主證人司徒氏宗長是改善,以上、或產品

·校·創辦,主演肯學類:金工設計,本工設計,逖子或電器製品設

夜班各組,利便同學更多機會遇壕適合自己時 校多問遍佈九龍各區,設有上午班、下午班,

司徒,副會長致訓中指出,當前教育,分

[就班,樹立基礎,獲得顯著成績,該校開迹F 夜組别多,而且班级齊全,即由初學班至命考,有與高深教育。 之後未跟程,設有文法班、併背、會話班,一容易倒塔,落成之後,即使處風地震,亦不致,漢口中心四樓。 業生深造英文,或作好出國升學之準備。該校地基與領機,建築導級固,自然扶搖直上,不可向工業機會公取,地地力親尖沙咀源口道 六大學預科班,已有十餘年,方便钅五會考平要的階段,基礎教育成就五十三聯絡,關於上述比賽的資料單來, :小學教育是基礎教育, 一班級之現象,此乃接校之優點,同學可按部是大學以至研究院。 班各班,皆有開班,完整無缺,絕無中間缺少一育即邊小學,中等教育即是中學,高深敎育郎 攙頒獎座,獎狀及獎金,以資鼓勵。. 一尚之組別就讀,實怒稱,該校不但、午、四個階段,育有多個其他獎項,其中有甲組獎項三個和 一件最傑出作品頒予香港青年設計榮譽獎外, 「乙組毎一類别設計獎項三個。各優勝者將分别

比售除在甲、乙兩組參賽設計作品中越出

活在海洋情和報名參賽,隨與香港工業總會 一設計及包毅中心電話(三十七三八十八內

及所高

.

口張八稱:

道,內食船和,出

化學建議答案

SUGGESTELL SOLUTION TO

CHEMISTRY, 1987. (1)

The change in gageous volume in step 1 is due to the.absorption of CO, by sodalime

2NaOH + COD

(1)

CH 4cuo

2) Tila is to

ensure that all the Cl

has been reacted.

(3) The two

reasons are:

(A) All the gus

volumes are measured at the same.

temperature

(B) At room

temperature water vapour

1s condensed. and it's volume

enough to be neglected.

Nit

the

the experiment,

(ii) Val,

in

the sample =reduction in

Faseous volume

in Step I -100-84.

Vol. of Fyin

the ample

vol I gas left behind at the end of the experiment

:機

.vol. of CR, in

the sample ~100-16-4

-80 cm.

(17) This is to

introduce the gas into the syringes and to allow the gad mixture to pass. between the ayringes.

Bromine water becomes palerio colour on "adding NaOH(aq)

This is because. NaOH reacts with

and HOBr, thus

shifting the equilibrium position to the right. As a result, the concentration of bromine water is decreased and the colour: becomea

paler

The solution becomes? orange in colour

again on adding, HC1

to it. This is

because the addition

will shift.

the equilibrium -position to the

left, thuê increasing the concentration of

As a result,

the solution becomes orange again.

(ii)Pale-yellow

precipitate of

silver bromide was aven and the bromine water becomea pale in colours

Ag (aq)+Br=(84)—

AgBr(s)

.On exposing to.

Gunlight, the

precipitate turned: violet due to the decomposition of AgHr to Ag by light.

(1) White fumes ne

hydrogen chloride. were seen.RUNSAA conc. Se displaces

C1 from NaCl and

HCl fumes in moiat

2

NaC1+1,50%

NaHSO+HCL

(ii) Reddish-brown fumes

of Br, were seen,

"Cone

first

displaced HBr te Bry and water»

50 +Na Br→→N@ESO+HRr

2H8r+H,SO —2F‚0+80; (or, 2NaBr+3H2

200+S02+Br2+2NaH50

(i) (1)A+D and C.

It is because

godium ca): liberate hydrogen gas from the

alkanoic acids, eg. A and

alkanels, e-g. Band C. ()B and C.

It is because acidified KCr 0 can oxidise the alkanola to the alkanoic acids and itself is reduced to cr?* ious which are: green in colour. (3)B.

This because

Br2

adds across

the carbon carbon "double bond (C-C) to give a

colourless addition product.

(ii) Compound X is B **** ___ (CH=CH-CH2OH) (iii)It is an addition

reaction. CH=CH-CU2OR+Br CHQB-CHBrCH2OH

(iv) Use a small pisce

of sodium metal:

and add it into

the liquid

3

carefully,/handle

the sodium metal

Rod A

with forceps,/ Wear safety

goggles, etc.

The reaction at the platinum gauze

is exothermic and beater yed can maintain th

platinum gauze at an elevated temperature, Tius, no more cheating id required once the reaction is Startedɛ.

(f) Use a suction

pump/water pump/ aspirator. (iii) Misty fumes are

condensation of

water vapour.d Pale "brown; fumes are seen due to the formation Nb, from NO.

2NO+O+2NO.

\(**) (1)4NH-+50,

2)It is used to

convertonia to nitric acid indar's trY-

(i):(1)It is i

precipitate all the jead(LT)

(2)The precipitate

(Pb50,,) 1s

contaruimted of sodium,

nitrate and sulphate tons. All'these ions Gave to be washed away. 3)This is to

remove any

water, adhering to the precipitate,

(X1) M(Pb(NO3)2}

331 g mol M(PbS0%)

303 g mol

Ph(NO3)btNa280→PhSOY+2NaNO3

mal

1 mol·

331-8

303 8

3.31 8

theoretical mass of

PSO obtained

303

331

(iii)The actual mass of

the

theoretical maso ̇because the

24

Pb-

lüng are int totally l precipitated or Rome of the precipitate is 109s during the process.

The get around the.

iron en turns blne This is beenuse, irun being more electro- positive than silver. loses electrons to form Fe which

forms a blue complex with hexacyon arrate -(III) ion;

Fels)→Fe

The gel around the. silver-platedend turns pink.

This because the hydroxide ion(OH)

js formed which turne phenolphthalein; pinico 2160+09+46~40件

Rod B

The gel around: the iron end turns pink.

There're no obaeryabre change at the zinc end; This là because zine is more electro- positive than iron, so, it loses electrons to form zinc (II) ion while iron(II) ions cannot be formed.

Zu(s)→Zn(aq)+2e

Zo does not form a coloured complex with hexacyanoferrate (III) Tony

At iron end, DH

is formed which turns. phenolphthalein: pink. 28,0+0,+4e→40K

Mass of Cin' 0.15 g of =mage of C-in

formed 20.22

0:06 g

Mass of Hin 0.15 g of Y ⇒mess of II in

0:09 g of water formed.

187

=0_01 g

0.15 of Y

0.15-0.00 -0.01

=0,08 g

mole ratio of CHO

-0.06 0.01 0.08 12 116- 0.005:001:0.005

-192017/

the empirical

formula of. YLB CH,0.

(ii)Let the molecular

formula of y bo

Then, M of y nx(12+2+16) -30m

60 (given):

Thus, moleculan formula of Yia CHO

(iii)(1)Y in an alkanoic

acid, Its structure) formula is

CHCO

OH

(2)CH2GOON(aq) + NaHCOng (#)→

CH3COONa{aq)+

· H120 (£) +CO, ( L )

(1) Gan A is carbon

dioxide,

Pass the gas into some limewater,

If the Timateria turned milky the

(ii) B is lead(11) oxide,

(ii) C ta lesd(11)

chloride.

2+

Pb *(aq)+201

→Pber(s)

(iv) The compound is

lead(11) Carbonate,

(a)(1) Cl2C-00

CH-CH CHUR

(ii) X sodium ethanoate Y propan-1-41

(iii)

heat

(Na) (1)

Tetrachloromethane

CH

iii)Sodium chloride solid

The shape of terachloromethane.

(tetrahedral shape)

(iv)The mixture will

settle in two liquid layera; tetrachlorò- methane Tayer:below

saturated sodium chloride solution: At the bottom of tetrachloromethane

layer there are some uudissolved sodium chloride solid..

(iii) From the graph,

≥2.15x10

time required(t):

46.58

(iv) The graph. indientes

that:

(b)

23

Rinser

Tisk +Napti(aq).

(c)

(0)

battery rhienstat

Vameter

AgNU_(aq) thetai

{iv} X is an ionic

compound while Y is covalent. Y las a lower boiling point than X and it is volatile, so, it can be separated from X by distillation.

(v). The hydrolysis of

A in acidic mediun is reversible. The hydrolysis of A is nearly complete in kaline median.

(vi) vieu natural asters (1.e. fats or oils) ure hydrolysed with an alkali such as NaOH, the sodium alkanoute:tlius

(b)

obtained is the · soap. NaCl is added 港美心:out the:

goan,

CHOOCR

CHOOCR +3Na01 CHOOCH

►JRCOONa+CHUH

"shap"

(i) Sodium chloride ia

an ionic compound

composing of Na and C1 which are held: strangly together by electrostatic force, an it has a high melting point. Tetrachioromethane i a covalent compound. and its molecules,are held together by the week intermolecular force, so, it has a low melting point. (ii)sodium chloride.

electrode

(ii) Ag*(nq)+e→Ag(8)

(iii) Q-(0.5x3600)-96500

-0.0187 F

1F 0.01878

miss of Ag

deposited -108±0.0187

2.02 g

108 g

(1)(1) This is to make

the total volume

in each sample the same though the concentration of Na,S,0 is changed.

(2) Thin is to measure

the time of the reaction.

(3) Tuls is because

aufficient amount of sulphur S particles has been produced to block: the cross from view after time t.

(4) This is to ensure

that any change in reaction rate is only due to the change in concen- tration of Ne, S03

val. of Navy820-3 used 1

But rate

reactio

and

vol. of Na¿S203

enncentration of

Hence, the rate of reaction is proportional

to the concentration of Nus

Methanel and

carbamide (urea) The simplest repeating unit of the polymer in

(ii) Chloroethene DCH=CHCT→(CHy~CRC1+1

(iii) The polymer obtained

in (i) ahould be used in making electrical sockets because it is a thermosetting plastic As (iv) (1)The polymer

obtained in (11). should be used in making plastic tubes

(2)Extrusion

moulding is the? most suitable method to he used.

sodium sulphite crystal

delivery.

tube

dil cl

heat

(11) The iodine;solation

is decolourized. S0.y+2H0+I%→2HI+H

(iii)The burning of

magnesium iu sulphur dioxide, Sulphur- dioxide oxidizes

magnesium to magnesium oxide. 2Mg+SQ1→2Mg0+S

The oxidation number

of sulphur. hig changed from 44 in

So to.zero.