CITY
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另通過推行 肅阿飛運動·將出東阿飛門市 約丿約書、拋開使
મમ
循徽交、演講、討論、廣播、
臺劇酸、開辦、銅 阿問題2
出版等方面進行
螺戀
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-2
箜校就讀 共九人獲得 分在中學以上
游換內會,醫蕤劲師、做、慢
靈,
(轉趴)袛念翠是鈴女士之獎助茨金,下粜網於七片發放 殯,產業服飾甜甜嫩 應苑、祖幾交、陳食
社會工作,政府英文特別班。
·華鴻、吳長、 小
(三)左列之六二年识六三年香的英文中型品會有天、 CT)左列Q加六年及六一部中女中學畢業會將戒煙區、移動、
私立中校協會定廿八日
舉行慈善換物會
籌教師福利基金
九六四年度
〔梨酒)本年寤中空中興高小品網
,我正式所定在六月五日
]
[行,至六月二十日止。至於專門科目
六月 (24 上午十一時至下午一時學,糖餅(第 本年度中學入學試
「試,則由五月十九日起劣,至五月二十二
評卷人員已指定
本殿試灣啓科提神的五月廿八 潔、吳導因、江的團
大月九日「足,
·範校學生負森 任: 文及英文兩科 算術科則由三師 由官立、津貼及補助學校選派發師担
,爾本及習蕸問有 上第六降準至十一時,既发納宮二
六月十日八期) 上午十一時怍至下午一時甲,公民。
文唹中學考試。
-EX). ,上午八時牛至十一時,國冽C]
培正中硃涵統。 無術
,創區將中
|六月十一日(四)+ 上午十一時半至下午一時半,化學。
元朗公立中學務試。
上午八時牛至十時半,歷史(试卷
試時間列下:
二,近代世界史)。 上午十一時至下午一時,縢史八烒
| 六月十二日宀尼期五):
-
幽門上午九時中至十一時半。 時間;上参丸野牛至十二時, 【三世骟劉鴻鴻;灣正中學。時 QUELKEEN EYES.
DELSESKO-SEIL
一
一:幹汞題-)。 上午八時华至十時半:嘿咻〔試锯二
專會信立龍九等生因易海海濱 生異優覽展作習 農獎豬行燙期定
〔
周街、漁、市武 升腻委員會, 兩會官立,補助,淮時小學,水校 太熙开!試,L定於下月六日舉行。本Ë敦育司
*莫墅湖、柏立社岀桜鰤5擔任云 〔
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|六月十五日(星期一):
痎猴:幾何下三角 * 六月十六日(星期二),
上午八時华至十時半:乙組學(試 上午十一時系下午一時;乙祖無以〔
時間:花开特十一時代。
那。時間:上午九時尙二十二時中。」他叫撒巴股行,此文展 用共有五十七間。 中,內超過三千二百二十八人,此項數字,作品譎四千餘件 本部中文中學高中畢擎會考之學生數一項,共二十九
熊流取
上午十一時至下午一時:一試
六月十七月八期:
上午八時半至十排中物理。
甲可劉翠 - (治)乙組與,(八)物 斑,(四)(五)公爵,(六)
會計黑科班二十一名 班六十九名,二年制 ,就會清死十九名
會計習作照縦優異學
он
六月十八日八期四 上午十一時至下午一時,變。
,上午八時半沉中時代,中指
[上午十一時消下午一時王宗弦。
40H =
上午十一時至下午一時,龍將蕃
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李景鈴女士獎助學金
下學期發放完竣
文中學會考試題預習專欄
華僑日報英中會考試題研究委員會主編
化學
(十四)
(continued from/the-thirteenth-19ave)
Question_28,
Define the following:
(a) Atomio weight of an element,
Equivalent weight of an element..
c) Valency of an elementa
d) Molecular weight of an element or
pound .
Answer.
acom一,
How are (a), (b) and (c) related:to ‘on日
another by one single equation?
(a) The atomic weight. or an element is the num
ber of times one atom of an element is as heavy as one atom of hydrogen. (b) The equivalent weight of an element is the number of grams of the element that will com- bine with or displace one gram of hydrogen, (c) The valency of an element is the number of
hydrogen atoma which will cambine with atom of the element in question. (d) The molecular weight of an element or come pound is the number of times one molecule of it is as heavy as one atom of hydrogen.
Equivalent weight x
Valencv.
Atomic weight
Question_29.
Am
(a) State four important points under the
Jonic Theory.
fb):In the electrolysis or
Answer.
water acidified
one
with sulphuric acid and between platinum electrodes, explain what happens in the solution before the passage of any electric current and then describe the electrode reactions taking place after the electric circuit is closed.
1/ The ions or metals ang ammonium and hy drogen ions always have positiva charges; while those of non-petals and acid radicals all carry negative charges.
11/ The number of units of charges .on 1.3 the same. 99 the valency of the atom dical from which the ion 18 formed .
any or ra-
lon
18
iii/ An ton and an atom of the same element are quite different. The atom of an element neutral, while the ion is electrically charged. Negatively charged ions are formed when an atom gains electrons; positively charged lone are formed when an atom loses electrons. chemical properties of an ion are quite dif-
The ferent from those of an atom, Thus atoms of sodium attack water vigorously, but when sodium chloride is dissolved in water, sodium ions are formed and have no reaction with. water.
iv/ Any electrolyte always produces positive and negative ions in equal numbers 30 that the total posive charge is just balanced by the total negative charge. A solution of any elac- trolyte is therefore neutral,
v/ Water itself is slightly ionisedi
H2O
蔬
an
+ OHT
A
and in a solution of an electrolyte in ̄water, hydrogen and hydroxyl ions are always present as well as: the lona derived from the electrolyte itself. This fact has
important bearing on. the results of electrolysis, Water is weak electrolyte, i,e,, very few water molecules
very split up into ions, but the number ions present ia always maintained, for if any of these Hand OHT ions are removed more water moleculas 'split up-te provide more ions.
of
(b)/In-the solution before the passage, any
eleotrio current
OH THETI
are moving
-
2H* + SOFT
H2O H The three÷ions, H., OHTMand.S0
in the solution at random.
11/ After the electric circuit is closed, the
cations li will migrate around the cathode and
immediately electrode reaction takes place as follows;
H*ions are discharged, HT
+e=H and two II atomscombine to form. He molecules. 2H =
111/ At the same time the anions, OH and
will migrate around the anode and also electrode process takes place as follows:
ion are first selective discharged,
OHT
+ e, and then four of these neutral radicals recombine. thus.
02 +2H20.
Question 30.
(a) Explain the meaning of each of the followine
three terms: t/ Hardness of water, i1/ tem porary hardness of water, iii/ permanent hardness of water.
(b). In softening hard water, what are the chief
objectionable elements or ions which have to be removed? Describe only briefly but with chemical equations four different methods for the removal of hardness from water. Also in- dicate in each case whether the method you have mentioned is suitable for temporary or per- manent hardness of water.
Answer..
(Ansaf讠/ Hard water in the water which does not
form a lather with gap..
11/ Temporary hammasi of water is the hardness{|} which is caused by a presence of bicarbonate: of calcium and magnêsip and which can be re- moved by bolling alone.
iii/ Permanent hardness of water 18 the hardw ness caused by the presence of chlorides and sulphates of calcium and magnesium which can not be removed by boiling.
(b) The object and the whole process of sorten..
ing hard water consists of the removal of Ca and Mg ions, which are the most objectionable elements in hard water. Methods of softening hard water are described briefly as follows:
i/ By boiling (for temporary hardness only}
Ca(HCOg)2
̇CaCO3
*
CO2
+
H2O.
XDD
程至六月廿三日結束 專門科目則於五月十九日起考 全部試
本年度中文中學高中畢業會考
六月九日開始
·發津貼恐校• 「後,即成波師,就有資格 九六二年鰽。該批在虺牧師傅得文
括彩照區八十一人,也雅話一百七 稻踞生共寳五十七人,飯
及 * 時由何雅服務及夫人邪颞岷就輕 假九醌新雅酒透,舉行維帶血路,稱 | 訓練班,宠腹〔十八)日下午六時, 【泰新社)九川及新界在戰域師
九龍新界師訓班
共二百五十七人
·明日舉行畢業禮
升中指南⌋英文科教材
今日在麗的呼聲播出
時間:
上午十時华 下午六時正
ENGLISH LESSON 46
PART II
TESI 2
'I) A word has been missed out at R. Write the word in the spaco)
a. Please wait X me ouhids the gate
b. She was airaid X ries.
e. Everyone was present X Tom.
d. No one agres, X him,
. The money was abused-X Tara, fim and Joani
Change all the Masculinas into Feminines,
a. My brother and my uncle are going to my grandiathe
b. The headmaster praised the boy for his aumaal
a. The boy scout helped a poor man ta ger up
d. That gentleman was the master of the house.
e. The son of a king is a prince."
3) bave, has, are, is, ought. must, could, can.
One of these words should go where there is a number Weltä trik SendFact
b. I (2) made up my mind to go.
d. You (4) go home at once."
o. I (5) lend you only five dollars.
word on the right. Use each word onze only
a. She (1) play basketball when she was young
(1)
120
c. He (3) looking for his younger brotheri
(3),
(4),
(5).
4) Complete the short engers to the questions.
* CaCO.
Caco
•
2NaHCO3 Na,SV4
ason," he is.
a. Are you learning English
c. ls sike a pretty girl?
d.pYou go to church, don's you?
ii. By the addition of sodium carbonate (for
both types of hardness) Na2COg
Ca(HCO4)2 Na2CO3 + CaSO4
+
or
"
iii/ By the addition of calculated amount of
milk of ime
1ine water,
This is called Clark's process and is for temporary hard- ness only.
Ca(HCOg)2
Ca(OH)2
買
+ 2CaCO3 2H20
+
iv/ By Permutit Process, which is generally known as the base-exchange method. In this process the sodium contained in the Permutit
and Mg Lona. readily exchanges for the Ca
CaZa + 2NaHCO3 Na Ze +
Cazo +
Na2SO4 The chemical game for Permutit is Zeolite, which consists of hydrated aodium aluminiums. silicate.)
Na220 + Ca(HCO3)2
Cas04
1.
=
The Permutat process is good for both tem- porary and permanent hardness.
Question 31.
Give in the form of a general statement the re- sult of each of the following changes i
(a) The action of dilute acide on carbonates
and bicarbonates,
(b) The heating of carbonates of heavy metals.
The heating of carbonates of alkali metal”. (d) The heating of ammonium carbonate. (e
the heating of bicarbonates of any metals. (f) Passing carbon dioxide into a soluble.
hydroxide of a metal.
(g) Passing carbon dioxide into solutione or aqueous suspensions of the carbonates of the metala.
Answer.
(a)
Carbon dioxide is always given off.
b) Carbon dioxide is given off and oxide of.
the metal is formed.
{a} There is no change.
Ammonia,& qarbon dioxide and water"are,
formad.
Carbon dioxide in given off.
Carbonate of the metal is formed.
Bicarbonates of the metals are formed,
For example: is he wailang?
b. Were they present
Yes... NA
e. You don't see him, do you?
5) Choose one word from the list on the left and putlit. after the word, given TOO
the righ
juice
shoea
hall
light
keeper
Crossing
Anger-nalt
a. basket
好
zebra-
e shop
d. traffinn
• police-
6. One of these words or phrases can be used where "there"la"a" number;
Write the word in the space.
Irianos, nurse, tooks, vorse, dactor, fruits, medicine, leg. sorry, better' grateful, flowers, baat, cold, unhappy, beating, milk, tongue
John was . His mother sent for the (1). The doctor came after sp.how He looked at John and felt his heart (2) He asked him to put out his (3) and looked at it. He said, "It is nothing serious. He has caught a (4). Here is some. (5) for lum. Drink it and rest for a day or wo He will be well
Alter two days, jorn was getting (6). His (7) Torm, Mary and Peter came to see him after school. They brought with them (8) and (2). loha was very (10) for their visir.
(1)
(6)
曲
(2). *. (7).
(3) (8).
(4) (5) (9)........... (10).... ..... Complete the word on the right. The first letter is already put in. Examale: A person who canes to see you.
a. One who asks for food or mansy
VISITOR
B
b. A place where water is collected and stored.
R...
c. A place where clothes are wasted.
L
d. The side of the road for foot passangefa.
P
P
. The top of the mountain.
Rewrite the sentences correcting the mistakem
I get up vey early yesterday morning and go to school early,
b. Elizabeth have two brothers and three sister.
e. Do your mother likes to drink milk.
d. john is taling than soe, but George is taller than him.
*.... Beads aề, the girls dež a oraRER