1968-04-17 — Page 12

駕教室

教

育

此外,在近數月來,又集行了一遍車共乘因部分能力及服舘才幹之培聲,使大學畢業生

的,演在

The oxidas of nitrogen are not basic. In

fact, nitrogen dioxide de an acidio:

百七十月四年八六九一股公年七十五団民華中

十艘業,經於日前函本病各大工商蹲構, 因大學洌牛黨委民會爲協助將業 一之基使能順利踏上創意之途,顯得無想 台‘阿越等技辉在此华年期間內是否需要聘

去

續

反

求

應函

港大學生就業輔導委員會

續求深造外 大部份皆擬投身社會服務 反應甚符理想 該校本屆畢業生除少數 去函各大工商業機構 徵求職位空缺

爲畢業生謨職

·本港工商界的荷形及需要,

风,工商帶用對港大畢業生有深切都幾

"携斯,暨本月中旬,共常約二百三十一座際會,裾生求職登記,編業生死低主意一步理失敗。

一定散瞳由,而無需尋求工時機選發業。 當科马生伯袜少数,就因是發科學生將來一府部門對從教育工作,甚少商工職業 【这珙前樂的落生較去年更多。此等變而,, 在過去抓仗,紫大岷棠生多任職於政,還坐在上商界中尋求更多就業機會,

片之電影會,此等活動在於使學生明白,其他商行任號;有隨時解囊之波神另亦一來,與座店想石路中,洪出其一 (

大本年度三項考試

阿入學資格考試、中期試及

已排定舉行日期

·爲加碱興主之聯繫,在較早期間,會分 就保解導委氏會更漪一步之工作,郎

聖若瑟書院摩理臣山小學部

,

方面才為及成熟感。因此,聘請時段多名一體的力量。(市)

代廣蘊著還養鴨之,新接分配至 翻鐇他們所受的教宵太學術化,就去訂,並能對否流社會之繁榮、風、紅世陳育淵五。位於堅尼

校舍內之淹性,冰 建。自前,小季新

按架

務數

翠克

年,獲發加大帮助。 【Ł推行區中就業工作,開一連串线材往服務, 機的攝生,使大家有架

·萊園道普聯,將依据大州煤尘在就業方面 據悉:箸千嫌中已有誤玉,表示帶用焚廉徐舌千名撷續深造外,大多也须投身, 何等人材,在離機磷息派員到大學約會訊 (許可,香桃大學水生就業婦道委員 虢隊員,隨有需要時,將揭做各盧高級人 | 下月期間集行,將有嚴槌凸避生五雹餘名,一九六三年,至一九六六年五月正式成立,書亞位於灣仔摩利亞,沙和土。当港賽亞洲在監察米高修, 一符合理狠區體,有否醣雅轉行彊業等 在啥大暴學生就棠輸導委員會對立於一 克,在政府一榇計烔 分析, 求声

架生,黴詢他們對現任工作的意見,否

一搬稱之藿话,對服務於他們的機襟之浩大 另方面,突出会又去海已經就撲的晕 ,包括文科、理科、工科及在科卓米,小庫部新校舍建仁畫硭步裡養神父王媽各高見面,發出「九六11年堅尼 年上目前在港 河西

新校舍奠基典禮

曲

星大

保学氏之家族過安國中大嶺南商科研究所

畢業生學能致用

一,以紀念其先使。此

一,抵分下下馬

|九排煌之十四翼號煤

望樹

望於今秋啓用,可容纳學生二千名 樹讓貝奠基 徐駛城辅理主教祝聖 新校可 喇沙叀亞洲區監督米高修士致词 李福

纳辅督:

成

道

告知極生前往照勝。 有關任何爲、然用风工鈴,只會被委員會工作之目標。

接全球而,後座

建與交小岗修仕向米校會小外

建逃學學士致软·致面工

廠約定聘用 : 業經本港若干大而行及工

除疑,米高佐上研究所一年級扇生數人,采逐本浩哥千大商行及工廠約定著用,亦錄建大佛頂花

一,在水总蛊之术

一惰乃傑,做改育典读首由基的旗 亦及黑沙會柝士對會 許書對事生希 建於九龍一 職務,深得各一年級生工人,會在本港大商行擔任全

杏光大图本年度刚朱武將在本月底至,在北職登記,此項記照的在於葉無事生 校平烘開,就咲 瑤委與會包開始學生之就架情况•

在辦徵召的下,該委會過去及目難的一何雅明、高級教育官再為經占士修士阻 德之另一項贡献之基於此体校會中接燒些間徒置區內。 ;解聘其長斯特 在最高。(琳),

ปร

日十二月三年申虎屬靈

GWAH KIU YAT PO

英文中學會考試題預習專欄

200

王錦釗、

化學科 (廿五)

Chemdetry (25)

(a) This reaction song that the substance is not

pare sodium pardenata, for sodium carbonate is

net dacomposed by hest. Bicarbonates will

ziva off carbon dioxide, and water. Therefore, the giron sample must contain sodium bisarbonate

GANCO, • Na2CO3 + H2O + CO2 ↑

residue

after

heating

The residue after heating is sodium sarbonate, sincs sodium sarbonate in strongly alkaline.

211,0

2Na +00

2014 28*

When sodium carbonate is dissolved in water, there are four groups of ions in the solution. Bodium carbonate is a strong- electrolyte and ionises completely. Water, however, in a very weak electrolyte and the degree to which it ionicus is very sma11. Carbonic acid is a weak acid and ita fons will tend to form molecules of carbonio acid

82003

As the hydrogen ions are removed from the solution to form carbonio sold molecules, more water molegules will dissociate to fora more thydrogen and hydroxyl tone. The hydrogen tons are again removed to form carbonia acid molecules. Again more water molecules dissoolate and the cycle is repeated until equilibrium is reached. At this stage, the resulting solution approximates to a solution of sodium hydroxide which is strongly alkaline Sodium carbonate will react with a dilute sold to give off carbon dioxide.

* CO2+ 2HC)

dilute

tydrochlorio

{b} When-a aolution of a carbonate

magnesium sulphate solut precipitate of

HONORMO

nitria nitrous acid

acid

Thus nitrogen is

[li) Metals, more electropositive than hydrogen,

will usually dispiace hydrogen from dilute

hydrochloric or sulphuric acids,

F. + BSO · ra

sulphurie acid

Roso + H

Thus iron may be classified asa natal.

Nitrogen has no reaction with thasd dilute '

acids, Therefore nitrogen is aot a metal, but a non-metal.

(111) The chlorides of metals are usually solida

with high melting points. For example,

sodium chloride in a solid with a high

melting point, vig., 804°C. Thun Bodi Yam

may be classified as a metal.

Nitrogen trichloride, however, is a

chloride of a non-metal for it will explode even on. gentle heating or under atrong light. (iv) The sulphates of metals aro solids, Sodium

sulphate and the sulphates of iron are solids. Thus sodium and tron may bɔ classified na natals. Nitrogen does not form a sulphate. Honce it in a non-metal,

(v) The hydrides of metals are nodally very.

matable. Sodium hydride is a solid which dissolves in water giving caustic soda and bydrogen, Sodium, therefore, is à metal.

The hydride of nitrogen, which is ammonia, is very stable, Fitrogen de thu a non-metal.

(A)

Lon

radica

form positiye

the

For example when

other

wm-freli vidus?

classified as

projant in 17 4 öid ative ions,

Thus nitrO;

of sodium in which

·ted fre Ate

Two physi

the behav

(a) Sodi

(b)

but

cala

electricity,

ag points, but

Iting point.

Questions for next week (26)

How would you distinguish between the following pairs of substancea Give

or each substance.

te in solution

tasaius chirate powdered coal

IBX

and sine powder.

or each of

description, actions described/

not, acted upon by

ily dissolved

ition gives a

isulphide, and with

sta soluble 10.

heated gyas ofr

leave

white

white.

cubia

uble

本

Identify folloria

This reaction shows that the

the solution

and boiling

would

contain

blos

filtr onate, which

ible in water,

Ma230g + Mg(HCO3)2

Mg(BCO3)2 = MgCO3 ! † co2 + #20

Conclusioni The given sul

contains both

sodium carbonate and sodium bicürbëra te,

Chemical properties typical of a metal aro a1

one oxide of

never buio and

sodium oxide and the oxides of

are basic oxides, Hence

cidio.

hydrochloris

4aid

(de) + (hoid) - (salt) + ( satör)

毗:梁风发日