1972-05-31 — Page 20

真四第張五第 日九十月四年子壬屋 英中會考化學科試題

WAH KIU YAT PO

CHEMISTRY

CONVENTIONAL QUESTIONS

e allowed. One hour and fifteq minutes)

Awer THREE questions only.

I equations anduructural formulee should be given where appropriate,

(Atomic weights: 1# 1, C# 12, 9=16, No#23,

* Adolas, making of gas at NT 2. » 22-40 durch

-35

Four elementi A, “I Cand 2 of atomic number lou than 23 ham tesphtallinly elections configurations [X]*]N[4, {X}6,30d [X37, ukuze (3s e noble gas configuration and 154,6. and 7 an

1) - Để tha A doma, pendet which wit be volite and which was conduct slectichya

"gay" "Predict which 43, Caná i vit tract with el, moudly,

Caut 16. Chiajna pas contiguission ]X) on W sporicaod, by a note in singconia)

added to: 100 km? «f'è Q-1-14 (mofit)

mifvison, al sulphwest vid med the mixing sequins 125 cual el à 04 M sedanas beged ronda

comple

Aerystine

X,Y,mif, Ols blùm lạ colour. Its aqueous

When heated; Bae solid sahi 'changes us a white powder;

郭日橋

Ai squrous, mbetion at the suất gives a pale blue precipitate with squeoca sidfem “Hydroxides. The percigante” saimpakuble je sinceur of the adicali; kat mana'black da'hading

An aqueous solution of ile sill givet u siznikać pole blue precipitata vish, Scjupava KURMacke: The precipitata, however, a ipjubim in azione sqaront paimanis su 2006 Cheng hind

Explain ak Use whereas incrainted, ghing equations where appropius, Deduce what

C'explain one chenstať ten by nkich you can identide MI

175)· A student in given an acidified solution of brom (1) sulphate, Suggest method ay which ha can prepuce, with the help of other chemiisis, a removably, pure aqueous solution of iron (U14) Celloside which in not contaminated with my 50%

Starting with unmentias chloride, večini kou a magis of pun jud. perzwed and valiossed in the labrescacy, ¿Diagram of apparuer

When Chan së mediem csibanush (uckysonen), main

heart glinia de mai Shermer reaction.

1.T.P. An collecut

XNTP. Pollected,

日一卅月五年二七九一曆公年一十六國民華中育教儒奉 三期星 ®

12 g of panous hydrocarbon Z we bumi completely in exim of dry daygen in a visitable apparatus, and the resulting gas is led through concentrated sulphuric acid. The acid incicans'

weight by 186 g. Calculate the implrical formula of Z

-20 litem of 2, in meuled at NTS., weigh 2:075| Dedick the molecular focava

comical equations and name the products for sack of this

li added to dry ethanol,

added to spić KORČ

septongjans for sach of the booming

Dayça in given all wi-the mode (platinmin) viven an slechte idalarių pelatsann ynë nel pivaviz ucid:

·Dry hydrogen chloride dans net' change the omlane" but kama a jázce of wat bine limit, paquer sod.

Decline how you winkl show that

大學畢生當小學致員工許多人會覺得好奇,但這個形在香溯日港

... 在外國不足君奇:在香港則可供討論:

大學畢業生當小學教員

FOR TREEKER-

六月二日開放日

上智英文女書院

「就陔於小學,對大學來說不迢基浪費。 示戡案百分之八十平計學當教師,但因爲中學渎師位有限,許多同學要 科成術區號)毎B由上 :問留港行座談會,其中一項談及大學教婿之变用間做,一位中文系老師,梁行開放在各城,剪線教理模 (E)AKKATOENENKER-KER SERIE ER-BOKE ++TUALCHE SE-111010-

HONG-FENK

血會上智英文女否院: 英國文革作品:6年 (RE) KUSK EER-110118-* EBBURE KHOR

SNRK-ZXUKE

徒嗎?中學教師並非過於,爲何許是中文語學生要裝小學就員,也許這朵。在該符(11) 樱方圆 鐵質,而在聯藥上不容選擇,客空似乎和否定,許多中學不是缺乏優绣 大三段上半小時主持

現在在理,在緻各州人士,若爲極濟與公共關科學

生案 普寜術爲 有三 搬家

第一,勵列五有圖文

XS & RE

音盒六史體 疵,交科室人樓現為學術設

爭有 號為榮兵 家堂陳國史學,方 模手

生物實驗案,又有化學

180-ARENT

中文中學會考試題預習專欄

英文科 (卅一) 一路藩芳一

ENGLISH (31)

Model Answers (30)

I

would come; wanted.

2. has never been; have been,

are going

would happen; touched,

should both be would be' should, open; had; did / has been raining; would stoj; have not been; bought (6, should not be; had not?

invited; met.

have been learning, have only learnt; care,

go; invites; am going; have received

changed, was passing;

jammed; waited; turned was watching, had met appered

As re have been so

eagerly expecting, the east. wind has come at last and Spring too, is drawing near,G

Everything seems to have

Just awoke from its sleep and is opening its eyes with delight, Mountains are bright, water is rising, and the sun is gedder than before.

The grass is jeeping up from the earth, fresh and green. In the garden and in the field, look and you will never fail to see stretches of green grass. You may enjoy yourself in any way you like, sitting or lying on the ground turning heels over head, kicking football, running a race or playing hide and seek, The breeze. ia gentle; the grass is soft The Peach-trees, the apricot-frees and the pear trees, one of them is

inclined to yield to the others in their contest of florescence. The red flowers are like fire, the pink ones like after glow. and the white ones can be r compared to snow. A Buell 07 sweetness, SGAME

prevailing. When you close your eyes, you will fancy that thej trees are laden with peaches, apricots and pears, « Under the flowers are thousands of humming bees with butterflies of various sizes flying to and fro.. Wild flowers can be found here and there, Some familiar to us, others are not so well-known. Among the grass they look like human eyes and even the stars, twinkling and to

Exercise 31

Put the verbs into the correct

tense:

I never (be) so bored in my life as I (be) when I

(watch) television last night

When I Took) out of my window this morning, I-(see it (mow) all night. It not (snow) so heavily for several years. akin I (wonder) what I (do) nov if I (marry) Jpn lnstead of Harry

This is the first time (be) in Cambridge since I

"(go) down" from the

University twenty years ago.

I said I (come) II ne

really (want) me to.

There never (be) any.

trouble in this village-

before. Now two cars

be)

stolen in a month and the police (go) round taking everybody's fingerprints. "What happen) if I (touch)! that switch?" "We both (be). blown to pieces and all the windows in the street (be), broken."-2.

8. I asked if I (open) the window. "No!" he said, "I (have) rather you (de) not."

9. You (think) we (have)

enough bread for the week- end? I (mean) to buy some this morning while I (shop). If I not (be) kept waiting so long at the butcher's I remember) it. But I, rushed home because I thought the baby (cry) for his bottle. When I (come. in I (be) relieved to find that he still (sleep). Boundly. I think I (go), and buy a loaf now. It (be) a nuisance if we (run) out of bread before Monday

English to Chinese

Life is short, but we waste time. Prices go up, but we continue to waste foods gas, electricity, paper, coal, etc. Using too much of

anything is waste, like, watering the garden more than is necessary, especially when later in the year water will! probably be scarce and supplies will have to be cut off for a part of every day. When we buy things we don't really need, or that won't last, we) waste money.

In time of war when everything of any value must be saved and used, great efforts are made to prever some, at any rate, of the thoughtless waste that goes? on in time of peace. It was during the first World War that Daylight Saving was begun, and it proved so profitable that we have continued every year to advance the clocks one hour in spring, and keep them- an hour fast until the autumn. Most of us get an extra hour of daylight every day, and the amount saved in the cost of lighting houses, shops, streets and public buildings ia,very great indeed.

Scientists showed us how in many ways we could be less wasteful with coal, saving not only heat, but many of the valuable materials it contains or that can be made from it. Waste-paper was collected -

- and so were old, useless books-to be manufactured into usable paper again, Newspapers had, to have fewer pages. Above all, everything possible was done to prevent waste of food.

KERUBAHAN

嬸刻畢會段校刷於新泰市者校

**

蹋跚

THE END

用动,五月十八日 赤柱泳棚,昨行啟

【皇仁舊生會

泳棚已啓用 (25)HUMB

英中會考化學科答案

堅道英文書院

Chemistry (29)

Electronic configuration

[x].1 .g. sodium Electronic configuration

[2].4. g. silicon

Electronic configuration o1 C - [1].6, 0.8. sulphur Electronic configuration of

chlorine

[(1) C and I will be volatile.

A and B will conduct electricity?

Dwill react with A most readily. The willingnsea, of reaction with A decreases from D to B. It 18 doubtful whether Bwill rest with A to form any chemical compound at all,

(11) Electronic structures of compound

Eis as followsa

Electronics atructure of compound 7 1a)

follows:

Electronic configuration of U is as follows e

C

B

Volume of sulphuric acid neutralised

by 12.5 0.0 0.4 X NaOH

-12.5 x 0.4

0.2

25 dice

Volume of sulphuric acid neutralised")

10.0.0. of Y (100

Normality

25) c.

75.c.c.

1.5 N

The formula XOH represents a monobasio alkali, hence molarity is equal to normality

Volume of Y required to make 1 litre of 0.13 solution of XOH

1000x

66.667 0.0

(a) The crystalline salt XY

noet probably hydrated copper,

sulphate, Cuso.58 0. Its reactions

are explained as follows.

Action of heat.

Cuse

5h20 cuộc

Action of aqueous sodium hydroxide.

+ 2NaOH • CM(OH).

On heating copper hydroxide ohanges to 1opper

Cu do which is black.)

12

■ CuO + H2O

(iii) letion of ammonia

CuSO + 2NH OH = CM(OF)

In exoses of sammonia, déep blus Ouprammonium ion is formed

Cu(OH) + 4NH OF **

-450

Hence, I is oppper (11); Cu

is sulphate radical. SO

To identify. This

e simply a test for sulphate

An aqueous solution of the salt is- acidified with dilata hydrochloric acid/ A solution of barium chloride le added. A white precipitate of barium sulphate: 'will be produced which is insoluble in

dilute HCL.

Caso + Back, » Cuci, + Baso

2031 To prepare a pure aqueous seartic

--- or iron (III) chloride-

The sulphate radical is renoved' EI precipitation and filtra

FUSO + Baci

[Chlorine is passed into the was

filtrate

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