日八十月四年五七九一層公年四十六徽民體中
(1) To convert it into a voltmeter reading up to 12 volts, & serien
oaiabine ahould he connected"
CE LIBRARY
台電育教頁三第張五第日七初月三年卯乙歷要
WAH KIU YAT PO
̇報日僑
五期星
[XXC)
in the pic
益
GE
10.2-0.05
x56.45 x x 100
Q-8428g BaSON was precipitaten.
1060
5-845
For the treatment with excess Back,
中學會考專欄
堅道書院主辦...
6975
18 APR 1975
中鬧會考專欄
For the treetmant with excues RACIN 0.8428 Raso we precipitated.
物理科(廿三)。睦永愛
證書主編
As molecular weight of 80 =233.43 Number of gram ions of 50
T
PEYSICS.. (23)
Bulb A 200v, 251
化學科(廿三) 陳湛杰
Solutions
=3.611x
233-43
1. (a) Daniell Cell,
Solutions for Charistry (#22):
Multiple Choice Section
1. C. Rainwater
Rainwater contain dissolved
carbon dioxide from air, and in), opable of dibablying ontojum oerkomte, roming a clear Hol tion of ciloium bicarbonite. ※H0+20g+Caus - On (HO
D. Polymerization
The phenomenon is known as poly- merization, dimerization is limited only to the case involv ing two molecules.
3. C. Magnesium chloride
Magnesium chloride accura as an impurity in common salt piorared from the water, it de 8 daliquas- cant substana.
Az Reaction between chlorine and
ethylene,
The combination of chlorine, viÊT achileno is an addition reaction that need not of antalyzes by Light
C. Avoniwa
nitrata
All eta oxygen except ammonium nitrate which yields nitrous oxida.
Conventional Question
Components prosent in the ple common salt sample are HuHSU, Nach Na,50 and insoluble matter.
Catiation of D.500
NBS + H2O
with 0.1M FaQH:÷
Wa50 + NACH -
aample
Humber of gram soles of NarSpar
29.17 x 0.1
10009177. 10.
Molecular weight for Naso, = 120.7:
composition by weight or
NaH90 in the sample
4
000
-24.17 x 0.1 x 120.
For the titration with 0.05 allvei: nitrate: 30mution:
ANO + Na¢1 - Ast) ↓ + TaNO Number of gran moles of NaCl nen
0.500 & aаpis
··10 x 10,05
Molecular weight for Nacz 59445 convosition by weight of Ki
四市四三五一二
0.500g BaialA.
0.5423
Number of gra:a molecules of
(ie, excluding NaH80;
= (+611 - 2917)
:-.6.94 - 1074.
Molecular weight of
30-142.
f composition by weight of Ra250 in the arte
← 6.94 × 10" x 142.05 x 55
19.7
Questions for Next Week Kaytiple Choice Seakion The following are the electronic. 'configurations of carezin alementar
112,4 N2,702,8,2 P2,0,3 Q2,3,5. R2,8,8,1
1. Which of the elements exist us
at ordinary physical condit-
D. EN
E. NPR
2. Which elements are chemically.
inert
空 3.Q only
D. M only 5. Londy
3. Which elements exhibit allotropy
a.only B. uniy
-0.00
4. Adong the seven signants, thoke
that are non-metals, are:,
A. DM,Q DER
3. 0:P.R.
E none
5. Which elements will displace
hydrogen from water?
ACER H. 1,00..
T. 0,RE, II only
Conventional Questione
1. Why is rotassium nitrate, prefer red to sodījum nitrate for use in A gunpowder, and sodium nitrato gen÷ 6mily used athur than potassim aitrete in fertilizers?
By why methodə as you distinguian pure specimens of these two salta? 2. In orgando liud was found to have the molecular fórmula Czigot- When treated with an opens di doTE
gas of fomulag which 16 in cold sulphuric acid ja bolubl Was obtained. On diluting with.... water and boiling the solution bo fomod, a liquid is recovered, which is tepmeric but not identical
What
with the original liquid.
explanation can you give of the
course of the reactions?
干律,九四八五七新
-分新天新·天新,新
Copper clsctxode::
H2SO2
-Cuson
„Perous
pat
It is surrounded by the depolari- zur, copper sulphate solution, Bota Hand Cat ions reach the copper electrode where copper Lons are ncre preferential and discharged. To hydsogen ouebles are fomed, Polarization is gliminated." Pazova pate
Frogen ons are forced to pass through the porous pot to the copper sulphate solution, Bing rod:
Zino dissolves into the electiu. lyta to fomine Long (Za). leaving the 610trodo zegatively. charged,
(b) B.u.f. of della
2.2volta
(opën ciriut nesaurement) () gitoh a closed g
current i creates in 200p WXYZ. The dit-drop on the
10 sm- iezistor is 2 volte.. The indop in the 0232s ia
· (262–2), volto,
a
With switches A and B closed,
the extoral stance in halved. It a 5 ore.
Tota osistance=3+6 phas £(R+I)\3 2.2 volto
The reading a R
及夜潙十燮十。下九。
·新氣
CITY HALI,
1600 ohms
Bulb B: 200v; 50 w.
B=200800 chine
In parallel arrangement;
Both bulbs are working normally
generatea energy twice as mizah,
Tri aeree connection, the p.d.
·Beroco ́A=,200.
B = 200x30
ped. Borosa
The power generated in lib
212·
A =
(200x (20x20)2100m
1600
(200)
1600x9
點
Both bulhe are working in abnor mal condition. They are dimmer than
The energy consumed in an hour:
Bulb & E-1141 vatt-hOTAZY - Bulb E = 5.5 watt-hour 2.(2) Van de Graaff generator Lun)宏Z0123
·(1)
syntain a very high potential ati point-divctergo: apmaying charges to the belt. colle ting cha rgên by induction. accommodates charges.
battery () Point A
(111) Point B
(1) Sphere C
(v). The charyen ou the hollow:
'condictor reside on the out-
Bale of its
(b) Resistance of the motz,
Maximum qurrent it can load
= 12 x 10
Maximum voltage it can load
= 60 × 1074
wastage across the multiplior RV volts V (12 x 103
-(12000-60)x10
12000-501x10 olme
12 x 10-3
= 1000 - 5 = 9i ahme (11) to convert it into en ammeter reading up to 12 amp., ahunt. resistor should be connected. This will brapoh out, the excess current from damaging the mettr.
The current in the shimt
I> (12x102 = 12) na
-I = 12x3 x 10-3 volts
15103 (12.10-12) x.3
60 12000 -0.005 okne
Question for Next Week
=(a) In an experiment to give the biggest possible range of current through the apparatus E, the foll owing apparatus are given; a piece of slectrical apparatus F having a resistanga of 100 ohms, a rheoutat of 100 ohms and an electrical auf 220 Vd.e
220v
Fig
Figi?
聞
(1) What is the least, and greatest
current through E-if the air
cuit is connected as in Fig.17. (ii) What is the least and greatest current through Efconnected. as in Fig.2T
(b) Two realstances are, conjured using a metic Bridgế.
4. (2). They the ofmuit ilasrona,
metro-bridge is closed by a 3-ohm resistance: ani the other by a 5- ohm resistanos. whore le the point of balapad
ohn on an A
area 1.64208-Sectional
is then connectai in parallel with the 5-ohm resistance. If the balance point is now at the- mid-pout of the bridge, what is the length of the wire
(c) cf allumination ayatear, 10/ Zomsd by a group of r220V anā.40Ww bulbs and in uho yiced by source. of 2.25.volte, internal recísteroa 2.5.okme, · If the bulbs are working et the rated value, how many bulbs are used and should the cingult bo nownectedT
2. (a) An electric cooker has two identical boating coils each of 50
The cooker, is ohms resistance, connected to an electric supply of 200volts, and can be used with
I only one heating ooil working, or II both heating coils working, in
series, or
III both beating coils working, in
parillo.
(i) Draw a circuit diagram of case II and another circuit disgran of case III.
(11) Find the tower of voo cooker
in each of the thres cuass, You' may assume that the reaistances of two coils do not change with tumpare ture.
(iii) If the supply circuit used.
for cooking has a 22 any main fuse, how many electric cooke with only one hearing codi working buy be wood at the same (iv) Way to is not advisable to
replace a blown fuse wire with: coprar. wire?
(b) Figure below shows a silver voltametar comected in a cirouit.
(1) What precautions should be
taken to ensure a fimm and even deposit of silver on the curved surface of a short cylindrical. "NIQda rod? Sketch al labal the
farm of voltametür you would (11) I 1.66 z silver is depos
of itsa on the cathode in 50 min- utes, not the sleptrochemical squimlent of silver dada!
, find the
1.12 x 10-6
kg:
-
electric current through the
voltamuter.
(111) If the ammotor in the vizquit
saulty and reads onlyY DORA,
what corrvotion ahould, ba
Cpplied to this reading?
Iiicate whether the correction
should e pooftive or negative.
三十,八十時五,七香都跡五) 夙任五·答曲四人 卅三影网時二分下一般自在十二輪十,目托十新九,昆賦,十,江乇。
辞·時分 分時架 | 間寺、午诗史、猪二一五朝時隔天的三之時
五開葉 虎聞。
*任常每‘漁哪呢‘米開,我聞食街,然
天甘子
香港電台
七七八大公
飯
樂府
新聞,天分,快的啦。 分:康招,五十眾 九時卅分,網
八時女五分,應視 一般 ·與南州五中場萍水族]第七集合力獨之節目:七時至九時「安江之燕」,九至十「太平山下漫步」,十范十璁中克畫都准,中 出土時十五分,今神[三刻「業交響曲」,六時乎「香港傳奇』,七時半是教育性節目,八時落誤藥性節目,降平 五十五分,設的風真役,韓牛至十一時「我為你唱」十一時「情濶波裤]。十一時「米高温的故事」,十法的一 「幸粜璃玻求」,一時十五分與平7下午旋律」,三時半是「風產業龍」實插根,四神真忿典
民玢的出歐出,中島音樂及夜的會轉灣野 後際辯論邀請潢,風期日「青臺交響曲」,「川括香江」漁民一週。第二兪方面,上午八時至十帅 “逢星期六,有東馬時其-
足我:「讓座談會」,「夜總會林」,期日「兒童博教育 可包括了教育性節目,中國各地歌曲選,下午七時麥十時之節目,包括:歐西歌曲,宗教節目,交
第一及第二台有新攻勢,基於
助|
·港合在四月廿一日起
港台配合夏令時間
方向,「前人的中區塊
#官四月廿日起1
在疑期日前八届
面對外 第十二五三五
典
今日第二輯,四十五分
大時,新聞,天美體卅五分,
明晚九時廿分
年開
培時音時曲州劇一你分,時杯時時榮
開股聞的聞: 股一新唱尜會要小聞聞
新的新播•快
新新
股行城, 市 物。漁天
市情嘛天
行测 棠、民數
王麗的英文名 討論港法貿易
五,十一仙,五
成功機:
多九起榮日
五十分,仙馬奇連結:人系法-他說:「本港杯濟情况,媾與世界無濟的發展而定。他并說散洲同時,因業到什县公 三坤五分後寶石中一中,將對除「撦法貿易」 港警英送苻爵士香港的闪濟發望,表示其個一少年對社會的責任者, 到庭,港法之間」貿易,今後會如何,最長只方爾之人士會被邀請在「固」之獲利用規張豪對因此,東大可放心打青藏高間有的間爆。此自农青亡的地方, 共同市建理事會最近發最的至明,指出不素氣的已近尾聲,預料世界精灣 宜的活著。對他的 的面面售座談會一直選年自的,永培費者 书法貿易·本且特別受歡迎。他 期大晚九時十分 明白到辦鳽十大事 點孺,将有助于在於杉系一個電視事 ,一千貿易代表團 表示辦目的,不
青交曲」節目中的两位青春派畫主持人來此四中一部
黨真依雜的濃電節日,由於何打種無法以專一直期到,他會分別使用 「再大的書出: 八十二日本决定在四月份,三合
閱及
年成
五于苦
『期來。
午隷
「談情縱」日遇
度制舉選
̇論對話電迎歡
梅樹
麗,助的
贏的碳。士
九四 大輩的
八國 盧二九
七一七
數有雕話閒談,及盘青年朋友而大煜,汪明荃五一一六 出-慵兆然亦展示一由於聽未打電話來的反應
話,選學制度,群底選制度的洞,四二八四,據園四二 了培騫實少年對這集的肉量S 值日主持人收即可。我们肯將大米的意蕙| 革制的絲聚會一縱橫琰」。」陳帆交四九五七,沈 任何署黑马保留今年「少鼽心的聽東,述常出門實實的畫馬,亦可
的情
華仁對星心女校 中學校際辯論賽
十時,新開,隨想
九時,新臨,管理
一由泰榮、吳君驚 [毎日鼂影卽漢宮生孢恨(在常送康青年人參加共出的「實泰交响曲」,
笹下五十八分,敬糍
政府大球塲-加山對 九時四十五分,總
黛·民一遇,卅分! 時十分,魘由夜眠過
四人夜間,五十七 十三時,新聞,零
商業一台
:+1時- 新聞-天 片」廿分,超人歷險
,九氣音灣八林
天時,廣長時,
飲酒
台:
·新配片
赛影
●眼片,
十分時何如用
卅分,大裝,面僑生
九時,愼話家常,「謝謝「清宮理
座
六時,新聞,天氣小說。
漁民天藥。 十時,粵曲,所分
,医史故事,五代袿廚 ,時代曲,酐分,天氣
「警」
味無 九分八訊告
名名,十要四
式的
一卡分
宮五,非花十騰,
五分類分一一凡美
合: 五新一扫情演變,集分五
分踞細花。由于。。
代曲。 八時,新聞,奧美一粤語流行曲,卅分,天 新聞,天氣 天氣 - 音樂。 ,名曲調勝,五十分,一時,假力球【 新剪報導,五水1 一,時代曲,無分,萬民
,天氣時代一
股市行情。
五十六分,明日節目,
明珠 台 新聞組加强服務
四時,「是麻街
小鎮春日一片集
夏
意語外...
完時。勇,陳蘭集五時
·莊二
由英内分號
下
十月
相分。
∴天面時導至前期有一
雄酒
飲,並新時少週聞內時頭新
笸品
买
麥小歡R
加友迎
事故友朋小
,歡聯童兒及
郭可來會魚小盲目入及事核權)
的四宽心人与 時月查
之郵央小,臺期如
發之鳳作台溝名
道回獅子山下
一生人是否一定其出
計有:夏雨、徐廣林、潘志文及林頓菜等。「一生只有一ㄤ]]新
一片集,全部資料,均由售新僑生其接供,故此「一生人只有一 一說明物對人類的書店,以及目前一般人對這搵「可怕的疾料」的解 傳染給我仔。媒建的做法對嗎?「獅于山下」今次就以一套痳修复題材, 爺孫用人同床,希望將米妮
?在「襄子山下」叔最近 痳一次痳$可以避免陽
以出麻爲題材製造
「電視藝員」獨獎典禮,齊齊出席爲此「十大」 在關合精的。 五月八酇一少年在大會堂整行。時, 十二萬五十五分·民」公開選舉的「十大賽為居長及總得學長有
成長黃銅,維羅假,車程,教書林,實為 在真的還椆播出,時間晚上七時五十五分,一號八英女直長
曹在五月八日是「尅詞
包
週末握「 !
男歡女愛
TRBERI - #
此資淺的勝利者,九龍完畢我們亦可出全質期的。 機兩聲,均屬經過多 這二個基期的决 港合主辦,文掏出了 日灣至準决實階段。來校服新餘約實在比美。達到控股,你就千万比第一線,裏面實,你良媒, 基的故「樂门玻璃体
汉切身有關的, 將播「應世文瀚」 下週三教育節目
老古人們有年贏
正人亦仍有专时的人在女利屬
句善的好興目。遇食
一認論。有惡校者器
說做是似慈方每九多
當用中文
|髙養雠限?正面的答璞「世文瀚」的節目。 是以防不時之需,但反共分六,包括了;公 而 面的客霾又是怎旃?」函私面,稱呼,公交,
[ 「養子防老,谷你知道的法平常- 防飢。當時亦勳必然的之後,港合為大家準他 心。但近代人又爲什麼了另一項應用文错寫的方式散 一个中國古人有一句說話,實性節目,七時半在的香港人有 四月廿三日起,致佈告等。希望這 「式之公函及正
但答什然
小及 抻的「怒驁英」
一為,四月十八日起
·張宛容負責出
份有 潘間 文
潮
法一,洪小人拖音常情
龍翔的舞術指導
推赴舞
星術
上集藏之外有生身心的 四月十九,1]千日播出
律旋國中的人動
間時出播台兩用四”