頁一第六第
日九廿月九年未丁威夏
40英文中學會考試題預習專欄
物理科
陸永熾。
PHYSICS ((1)
The sër 169 of{weekly exercise is
Intention:-
NIWLCAFLDA)
(1) to help students to review"the subject* thoroughly)
before sitting for the Hong Kong Engdish Schpol
Certificate Examination,"
(2)to guide students to answer questions? in anl
acceptable form in examination, and
(3) to provide hinte to students in dealing with
different types
of problems.
To achieve the above, two questions will be set
similar to those in the previous H.K.E.S.C.E. and G.CIE).. together with some of highly original and ingenious 、 questions which require a certain amount of forethought and planming. Questions are immediately followed by suggested answers in the coming Wednesday..
The Hong Kong EngLish School' Certificate Physicd
'Bxaminatiorf paper is divided into four sections; Section\
A deals with General Physica (Mechanics and Properties of Matter are inclusive); Section B, with Heat; Section C7
with Light and Sound; and Section D, Magnetism and
Electricity, The examination questions are designed to cover practically the whole syllabus. To pase the
examination, candidates should have a full knowledge on the syllabus; and understanding of the priciples and laws, an ability to apply these principles to unfamiliar) problems, and they should have, performed all fundamental experimente.
In the examnationeandidates should have"to"take;
-careful note of the instructions given at the top of the examination paper and follow them strictly. The choice
of questions offered is usually more than sufficient.
The questions may be answered in any order and it is a'
good; practice to,read through the whole paper carefully
and tackle the more familiary ones f first. Do not write
furiously ; the moment(the paper is received. Candidates
should be reminded that, if 20 is the full. marks for a question they will never get 21 out of 20 no matter..
how long and how well they write the answer. They should
try to finish the full; number of questions required and
spend not more than 25 minutes on each question as the
paper laats for 150 minutes. Be sure that there is spare
timeJto read through the answers once. more. and to check o
the solutions/
Account of experiment should be impersonal, Tavolaj
is Ing imperative mood in the description. It is clean
that writing up accounts of experiments can reveal
those who have little or no acque Intance_with practicalys
work in laboratory.
Avold
Juiagrams should be bare, clear and labelled perspective drawi They waste time and often lead to
confusion rather than clarity, Diagrams are helpful in/ -Boorang higher may
Numerical calculation always, proves to be a
handicap to students. To remember the principles and heart is not difficult but to apply them in~ ng problems is a real headache to most or them. There are some suggested steps for solving problems
(1) Read your problem、carefully; understand dit:
it says,
Write doum each item that is given:
(3) Knowing what you are to find.
(4) Think out a method for solution (use an
equation, it possible).
(5) Solve the equations mechanically: (6)2Check by substituting.
期
十年七六九一层4年六十五國民路中,
...
倫敦大學普通教育文憑試
明年六月至七月舉行
小湯加
|-莊玉萍,苧分胗,咸潢、黄芪玲、蘇惠,拓展,啟銘明,大會已東請各界人士举行迎新能食,以加一
永症,海美,炸锦目,冷小蘇
珍佩榮,琪無溫,露小寵,琦惠
1,玲少展,莉情用,索戶
妮深逗,冰察到,容
·娟燕沈,非蘂伍,屬瑞卒,
國生應及該系全可
年六月十日至七月六日期和提行 如非由學校保送之考生,得以自儷生名義參加。 文中學會考證監、英文一科良好-),香港大學段中文大员入學對合格證書,及普通殺 少芬,郭煥英, 呂 如非由學校保送之考生得以自修生名義參加 何威買,羅婉衔,何 「韓氏)被育司簡乃傑昨日(星期二) 宣佈,倫敦大學普通教育文意科,將於明(順怡,分骸英, 英中會考將告改制 荔本跟名楼爲二十五元,初級考試娄每斜二十二元;高級考試費用部料三十几元一次甜,她還有,甘于吃出後, 彩痍統宝照,旁袛 參加者案,故決於中, 官交源。此外,於一九六八年一月一日已達到威超過二十五歲者,亦可申請報名。,,半英文中都會考辦法將大禮堂-假豪家中藏七日升中班,因報名 路盡歡而散。(南) 考生必须持有以下过密之任何一種,方可參加,香港英文中學會考證粱,香港中一麥爾良,江玉嬋,潘 中文校聯會决向當局提出建群 升中無&屈成毅論〉們關珽起舞,濟濟一 七年十一月六日至十三日期內,親自前往香港粱廠街廿二號A];姊情容,馬風式,出所對,當凯成立背意字等,以爲該校度上,為中間學校, 私立中交校麻會操「山河並壽」及大剑
,李智屏,榮穩定, 中中會考亦應實施 銘際熱導小六學生,晚會節目襲女, 八中國社,關於,才博士將於校內二樓百分之八十以上,第一堂,萬當然爾,深夜 一举升中民,其附設 音樂蹈供,用
,但科露二十元。..
老改制研究小組委員 生行證並簽名貌盡,我提高,故準爲學生
雲錦隸,璞情,
*怡腿酸,
,然佩無惠燃江,勻彩躍,小陳健:
公,感,本驿英玉藥,英婉邦、燕英
嬋慕俠,海退隙,還石, 敏淑明尹,其大 翠林爽黨,雖藏,英重,恩割,發
美是路燕萍食,新月篩,儉意尹,蘭尋,琪,懷香品,月秀甘半呂潘,翌笑何,至稱,發眼,風碟平箱林, 有期與有具定有制藤惟之制烈開審歎永陳會時 在西法國原同閟腦文員桎同英爲軍體僉質欲主人餘、樂,在
沿桂林,娉風機,薇瑟症安
好都信,巧坤部,如明李、 ).如英牢,跆傥金,娟愛用,
中國通史文憑課程
雙下意
各項文憑課程,於本如下: 所紫紅今秋新開設之,現釉陔部接受公佈在九時, C淼杌)香港中 两大,毎次两小時,卡 文大學校外進修部,本學期之上藻時間表,這期五)下午七時的個胄,前者的道,成石永燊、陳濁科、 一九六八年一月五日授「圖書館將抵廻仙桃,昨鳳率 六九年一月三日入屋括中的周會館史),獲芳,陳淑娜,李麗(卅一日正午十式 成,國父底辰委創校 三菱,分校荷李活道 港語言商科書院、校
同期校皇,期敬,員金以無
道八址之
秋
華
商
會
專
,
楊譚生任理事長
及中西漸無,會計相
校浙、洪文街、被
「班-西班牙文-中英
:C雜訊 九龍 雲核主任榙店開業 下月十九日舉行就職
文會計班、成本會計
隊的。「區各館事」藥日期及時間:十一
「大爲「品酰管技術 月一日(凤期三)E 一原理及「機職之基 午九時至十時,物流,該長程共有, 兩組則在新雅書院玉,蔡明珠,朱少,
时
,任好主
美國服
大道扎、出入合
香港婦女分科校
WAH KIU YAT PO
多所得及限入选。 精選
都有入稱一課數受
者經過
(依日是的餞行限一,
史期分的四,入及百申辦 文上那學十本學設
碟愛員名期渊述
之人策月麻
樓角下今一
三時期月牛十国
五十八五
1、吳署,
劉華民岢何蕸頒發證
• 院舉行第三週年結菜華民,什般夫人
全檢伉主到出
繼家躁培
·畢業生題名
*所有被冰的學員, [10日星期三星何薮張萍,林
假告
•發表杌、潘秋、
邦財秋障,能審菜盤,朝 覽紐爲員
三三在會
職雄泵查數
話機,一查𨭎案 聘務帳推等
互
院
質餓時
本
小雄、龍杰容、黃國總統蔣公壽 在因为,向吴發業
·涔、陳柔、邱
港,為在品現新許每間會任能行十月
一故,無職任任,校成蟲两目。七十造贤主志查
「師由餘地彃街
·校景新慈用一
糖常近導
數
影視中國通史交灣線五)下午七時至九時 航羮,嘉寶軟飼溍有兆龍,黃月陋,李建設職員分别色加港九燈,前像天中,紐在
一通知彼等花期上課。八日及十五日(尼期 副岛勉,楊枨祖夫人,在王城,东逆難,秀斯·維群英、麥公八大舌一灌沓,除 宝,臥務主任磽新,該行爬
、吳本死、 C特氜,本港德,鄭汪娟,精科主福 珠海外文系 此區,採新財運
瑝全部與法案年
限為一年,包過投踝:(五)隋、唐五人,隱白該校主任吳霆,隣少玲,認為與張測機、崔銀姬、臺監外,該校校長愛河,關場提生,岑庒秒 龍基督被育年會給然(微) 「余福佑、莫多嚟等多玉華,馬愛玲,更、陳衛蘭、梁彩,文教界之祝壽師數來穿,業主任徐愛瘓 院外一課,至下午
行然沿播即火率九桐目大洋,西至比彩星爆兹等拔
河内
1968
會考試題預習專欄
台化學科
王錦釗
CHEMISTRY (D)
NGK
Clear and logical presentation in the solution is of
equally importance as accuracy of:
doswers. It is merely an_
ise in:deduction; but even so, candidates have to by extensive practice before they can master the
task. questions for this week'
13(a) Draw a Labelled diagram or ommon laboratory,
balance
(b) Tabulate the points, in its construction which are
essential:to ensure accurate and fast weighing.. Ko Abody? "weighed on a balance with arms of unequa.1 (length, is balanced by 28.80 gm. when placed in one'scale "pan, and by 31.25 gm, when placed in the other pan. What is the true weight of the bedy? d) In an experiment the top end of a vertical spiral. apring is clamped to the stand and various weights are attached in turn to the lower end. The height of the lower end above the bench is measured with the ruler and the following results are obtained:
20
60 80... 100.
Weights: (en) 0
wattached:
Height above.
'benon (cm)
40.0 38.9 38.1 37.3 35.9 34.9
Plot a graph, showing the extension of the spring:: under" various loads and state any deduction. you may reasonably make from your graph.
(e) "Find the length of a spiral spring whion measuresy
36 cm. with an iron ball of 800 ele, attached to the lower end and 35 cm, when the ball is immersed in water. (S.G. of iron - 7.5))
verine the term "pressuret.
Calculate the difference between the pressure of 75 cm. of mercury and the pressure of 10,00 metres', of sea water. (Density of Hg 13.6 gm./c.o.) (b) A vertical glass U-tube, about a yard high, is half-full of mercury. Describe and explain the effects which cccur in each of the following experiments:**
(1) The air is removed from one 11mb by means of
vacuum pump.
(1) The air in one limb is replaced by water. HW..
would you use these two experiments to deter- mine the atmospheric pressure in gm.wt./sn.co. and the relative density of mercury? (c) A fine thread can withstand a maximum pull or
500 gmawt. without breaking, What is the greatest mass of metal of density 9 gm./c,c, it can support. if the metal is suspended in (1) water, (ii) a liquid of density 0.8 mi/c.c.7.
When air La: made in the ladore tory by midog nitrogen
and oxygen in the correct proportions, is heat given out: or required to make air?
No heat is given out or required.
each
Name
Potassium chlorate'
Potassium“nitrate Te) Merauric Oxida)
efd) Lead Dioxide
(e) Red Lead
JBRARIEST
When air is liquefied, is this a chemical or physical change?
This is a physical change (Achange from the 「gaseous to_the liquid state,
When Ilqudd air is evaporated, giving firat pure'
itrogen and then paire oxygen, is this a chemical
Vaigal change?
Thie is a physical change (A change from the liquid to the gaseous state);
Are there any essential differences between air on. the one hand, and a mixture of nitrogen and oxygen on the other? If so, state them
The essential difference between air and a mixture of nitrogen and oxygen is that air contains small quantities of other gases such as argon, carbon dioxide and water vapour in addition to nitrogen and oxygen.
Does air behave as if it were oxygen mixed wit埚 adtrogeni
"When nitrogen and oxygen are mixed in the ratio) 4:1 (by volume), the mixture behaves like air...
From your observations; give three good reasons for Baying that air is a mixture of ooxygen and nitrogen..
(a) There is no neat change on mixing oxygen
and nitrogen.m
The
nitrogen and oxygen can be separated by physical methods such as fractional distillation of liquid air. (a) The properties of air are the
properties of nitrogen and oxy
The solubility of a certain salt 18
20
average of the
gus Tin 100 gus
of water at 100°C. and 11 gms, at 30°C. What weight of the salt would crystalline Lf 50 gms. of a solution. saturated at 100°C. were dooled to 30°C?
At 30090 wt.of. saturated solution !
wt.of water in the solutiān 、 100 gms If wt, of saturated solution Than wt. of water in the solution -
Pand wea Cysalt in the solution
wth of walt required to saturate
of water,
33815
of salt tha
ld crystal21se out
(16
Equation
•*2KC1+30
2KNO
6POD
Give three important uses of oxygen.
菜菠菜活以
同款螢主
(a) Used in the making of steel to burn away.thel
impurities in the crude cast iront
(b) Used together with acetylene in the oxyacetylens)
flame which is used to_cut_steel parts and also weld. them together
Ko) Used to assist respiration by deep-sea. diveraar
mountaineera and_in_high-altitude_flying in aeroplaneat
D.cuescribevorderly how you would.convert e metal into "adi
oxide, other than by burning or heating the metalin/ lair.or oxygen,
Pirat convert the metal to the nitrate by dissolving it in nitric acid, a.g. copper will dissolva in nitric acid to form copper nitrate.
BCT SHNO,
→3Cu(NOg)2+2NO7+4H20
The nitrate.sclution after being evaporated ta faryness will decompose, leaving a black_residue( loueria oxida
2Cu(NO)2
Questions for next weekij
LAGive different examples, one in each case ofi
(1) a reduction_involving a loss of oxygenny
PEquation:
(11) an oxidat2on: involving Achange_in_valency of;
Yan element si
JEquation:
(111) an oxidation involving a 1088 or nyorogen:
(Equation:"
iv) a reduction involving a less of a non-metallic.
element other than oxygen. Equation::
2. Describe what you see when red me in a long test-t-equation:). What is an oxidfing agent?
cxide is heated):
Which of the forwing can act as ox1aising agents and which as reducii agente; hydrogen, red Lead, chlorine) orrbon monoxidedve four different reactions. one' for each substato illustrate your answer. A white. powder is known be either an oxidising agent or a
cribe two teats that you would
at it is..
reducing agency perform to
1.330 gms.
manganese" oxygen mee of potassi
How would
a catalyst in
evolve
pe of potassium cniorate and\ Meing heated gave 265c.c. of
Cand 765 mm, What percentage) Swas there in 'the mixture? at manganese dioxide serves as
n. and does not_decompose: