CITY HALL
HEHRAN
日三廿月四年未丁廢
WAH KIU. YAT PO
英中會考化學科試題
The Sodium metal is stored in paraffin vil.
CHEMISTRY
Time allowed Two hours and thirty uunitori
Wanddate No (10)
SECTION AY(20 Chamkt)
(
AGSKET JYLL ME questions in the spaces provided.Z Chemisenð svitata are permitteėz „pisly to ognaGuns. J
Give the name ofle
A substance which gives usýgén when tềnied
1
What indicator would you use for each of the fallendrino titrations:-
Hydrochloric acid against sodium carbonate sviution, Hydrochloric acid againsı sudium hydroxide soluliká Acetic acidragainst ammunium hydroxide solution,
+
[Answers
F
›
ANET.
A
rais
An oxide which is neutral to Jatoms.
Fri) An acid containing hydrogen mums dot all of
which are replacimble by metals.s
1
• erasing prepojavi
台二月五年七六九二年六十五國民中
下月招插班生
官小二至五年
始會考
新小學仍爲修學六年
| 罔各該分發敬格之同。用一九六王洪* 應按照規定之日期, 西許參加中學學 二、校派發,坟安之後,一年普通教育,然後 卅
深程之後,仍需再愛 格,到時亦在各官 月一中讀入碗。所有申請沙學生,在堪年 五否有空油,然後施行 皮,所有新小蔥 RUNESKERESZ
一上有北級者,屈時可 丁若處。 六凡擬就讀于官小 限岭特殊蜥形下 官小學申請 - 但只
月初接受辦。
(特)本満宮 雖生工作,鉴于下 粉,眉時亦可向各舘 |小招收二至三年級 之官立小學六年
對格。
BAKER-
的時一處內設褁衣 將 任表亦豬 MRAT KH
TANAH
-ADNEZZ
• AE.......
ch.
PAHALA TE
D
TABIA
Acent acru agarose sovitim hydroxide solution
་་
Name one piece of apparatus essential for each of the todowing pruceusvag carried out in the laboratory:-"
To deliver accurately 25 m) of a solutio
To measure 230 m) of a liquid
***
To deliver accurately 12.8 må of a solution,
Give the general formula"of:
(a) saturated bydrocarbans
"
(b) aliphatic monobasic carboxylic,
butacids
[(1) Ag element M Turma two-oxides having the formulae MD and M ̧0,†
respectively, Give the possible formulae of its chlorides and ASU
ulphates. (a)-Chloriden
* (b)Sulphate s
What weight at egiver with h. 11verárea Irem a silver mirate solution
containing more than 10 grams of silver Al an electric current of 1.5 amperes is passed through it for 20 minutes Electro-chemical-equivalem of silverj = .001118).
中中會考乙組數卷二試題
(REFINERIA J
乙部選答如願。每題佔十五分。全器與答十二路,
浬
́ ́EA ABO # D ZA 1TZATZE
123 (0)1
[(v) ZA liquid which dissolves_201priză
[Air_in_a_mixture.NGive_two reasons_16_support the starsiralij
Point out three mistakes in the following diagram:
Fotors solphide
and
¿Dilate hydrochlae's weld i
(ii)
Preparation of dry hydrogen sulphide,
Calentation:)
Hjebogza gorphida
Constrated
gulphuric acid
Water
Write'sauations to show the following reachiDNES.
tw
Heat anhydrous ferrous sulphate.
(ii) Heat sodium nitratė,,
(filPass carbon dioxide into lime water until no further change takes place
fivi
Burn mathyl alcohol in air.j
[vd
Pass hydrogen sulphide gas through hydørgen peroxide solution
(vi) Pass chlorine gas into a cold, dilute solution of sodium hydroxide.
Answer:
Plaase turn over.
( Elements whose stoms have different atomme wei,hts but exhibit
Fimilar chemical behaviour are called (a) allutruper [b] rön■} (e) trobars (d) seomars fe) isotopes.
-
(u) sodium chloride" (2) sausante, (i)(a) Sodium carbonato
hydroxide (d) sodium nitrate (e) sodium sulphate is the chemical which can be used to solian both tersipurary and. permanent hardness of water-
From a solution of alcohol water, a more cuncedtratam sololig of alcohol is obtained mal evaporati
(b) decantation (c) tracktopdistillation (3) Argan (e)
ecision.
Fix the mode abundant metal in the earth's crust
b)
b) zinc (d)ead, e aluno
One major use al maghestum mētā; 34 for making a coine, b) electrical conduciors (c) flash light bulbs id) door knobs
el cooking utensils.
Annonium chloride can best be separated from a musture n sodium chloride and antonino, chlor le ky (a) rystallizati
(b) sublimation (c) filtration (d) distillation
fel decantation.. A
Draw labelled asagism of the for-luminous Bunsen Dame.
5
ZA,ZF
**&*##‡BE (radione) ?
* ABCI
鲜方程式
10.
oot
050
Stan L
·DBO. #
900
finaa§ sprecant)
在第二限之角A 適合 5 ¤ A = 4;
2 000 A -
0 900 A+ 013 A ZŒ
SA ABC 老頂點A所作外帶全與此三角形之外扭個相交
#PRR FB ➡ PC)
约定點P與一直線 AB 之距離爲45公分。求作品下其微
312公分且 切AB,又指出適合上述條件之共有若干ㄧ 不用描述作法及證明,但須清楚表現所有作腳,決
不远恒等式與策件方程式之分别啰
Fill in the blanks:-
Water gas consists of (a)_
Hi
Producer gas. consists of (8)_
and (b)
and (b)
and (b)
(ii) Coal gas is composed mainly of (a)---
(iv) Three by-products in coal pas manufacture are (a)
What would you observe whent-p
and (0)
Im A piece of zinc is added to a solution of copper sulphate:
(a)
(b)
small plece of potassium is added to cold water.-1
UiA pellet of caustic soda is exposed to the atmosphere:-j
(a) after a short z' while..
'tb) for a long time...
Complete the following: 3:
(1) Sodium is manufactured by
(II) & Sodium hydroxide is manufac
ONG
in volumetric analys a adlution of sodium
nate behaves as
Cadus regia is a mixt
Hypothesis states
factors which may affect the
chemic
(Where is the hottest part of the flamei
LABEwer:
SECTION B (120 macha),
answer FOUR questions andy. Each cheries git marks. etructural furmulae, whère approbéiate
by each structural formulà.
1+ tant*/1 — tanë
·1 + oot
100t
(1)設有不相交之二個sys,其心
C
US KAUSA AZXHLE CO' I? · E A A→
1ADA = 1.5657 REZER J
FAC • 724
(1) ABCD
部
ABCDIP & AB 4 AC
《答案可用根式游示辉)
Give chemical equation (•) ****V*{
Name the urganic compound a repre
A gaseous organic compound 3 was found to comain 85, 72% of carbon and
928 bl hydrogen by weight.
the empirical formula ofă frum
PUBLIC
(u) Calculate the volume of oxygen requited to burn completely 10
(iv) £ How daẹs this compound react within
(a) Hydrogen
(b) Chlorine A
(c) Hydrogen Chloride ▼
Tidi Concentrated sulphurid seiða
Describe, with the help of a diagram, how you would prefidek was of fairly dry sulphur dioxide starting Ccom kodium sulphite.
Explain the bleaching action of (a) sulphur dioxide and (b) chlorine,
butaNG, FIVE CULærences in the propertiga út exeri of inv tollowIR substances
(a) Carbon monoxide and carbon dioxide.)
bi Nitric oxide and nitrogen dioxiden
13. A solution. Y cumains a mixture of sulphuric and hydrochloric acid. 25ml of Y
requires, for neutralization. 35.0 ml of 0.1SON (0.150M) sodiunt hydroxide solution. When excess barium chlorida tolution is added to another. 25 mg of Y 6: 262 gm of barium sulphate is precipitated. Calculate the concentration lin
zama pex litre) of each acid in solution Y.
ho
5- 32,0 16,1 B137.C135.5; \ Na = 233
ZrÊ SỐNÐ Á ZPRO •
(3)已知所定點BC之距離為5公分。
*MBA X1 BAC • 74 8 AM
撤錢之距離為3公分。又指出適合上述條件之點A 右若子(要寫作法,不用證明。)
a)逃正多邊形之定義
(0)已知三正十二邊形之一邊10公分 我此多邊形之面積
及其内密型與外切面之半德
177. 11 24 med 2.0 5 Lf & 21 6520 @ 208ALAT
6218之方向就行;乙船以每小時20哩之中向附理 日 志方向航行。問兩小時之後二船相距若干?又此 時甲般在乙船之何方?
IÊ
▲ 480 ₫ 1 BC, CA) AB 20ANAPONA S
之垂足露ㄚ。PQ37x
RUS - • *2
PHO
Show, by nieans of a diagram, the arrangement at elektong ti molecule of
la) Sodium chläride and (b) 'Fluoriney
{a}
Súdium chloride, moles
· [Fluorine mulévalu
S) 日強
方形安58 公分,3-5公分,用幾何方法作 一等轴正方形。(要写作法,不用證明 > 正方形之一邊準確程度至0.1公分。
reasons for the tollowing
Concentrated sulphuric acid is used
authbraeiia
Nichie seld prepared in the laboratory is always gollow in colour.
Funed calcium chloride cannot be used to ammonia gas
motify,the" following bubakkaras A, B did Gan
edivaising causitung witere abafuðbei
aulid, suluble fat water, when AZA warmed with dudium hydroxide avļutidë, ë rolburless gas is given off whữ bị turns mulal and litmus paper bluë When A ja verated with cöpe But fateő” vulputje avidin volumileas fuming pan, ja given uff which mužna múrát bánu, j filmopa paper reu? When # solutioni af. A trendified with male asid) 15, levatepl with stroke nitrate kuliition, « white précipitate as furioed,,sunith dissolver
¿Bubiánce Áncoluries r JERE
Subatan Blas white pyšiteri, konutliboki walce when I la Besaggi fatronatyra e ajudes pas, which lurks Tow Uster mitky, in gryen oft and that yellow kasidue, ad turmed turnd white ona magtinge 1 diasolves in dilite hydraz chlurik sd and (beganne Cajuurissa ja rahvaved, When domaida nydrode #ulution va adfed gradually to the readmit adlution; a white Artásäaüs freef erģijate ja keras davored whaare missakies koeskens of this athalu,
Sunatando Cia a track powder bulubiufiie wateremti dinakymą ir% feuncentrated hydrocutorić acid forming a clear. Džish-greku polution-ang ktvink of a colourless day which hiet kena ikad dienata ja peal. WhĘC LEN solution is reated with ammonia aliquo, Light, stau: prbasģitate în, firát tur med which dreadfueran anéasa ammonta tüfining a deep blue vulturùnd
व
Daxerike, what you whimlit khawa waande musikali onar-nazimena saha
A. Aliction of coborr fulchate 16 lenteolysed between
Dilute hydrochloric acid 16 added to a pulution or lead nitrate and kultant mixfüro Häätað
Just Heat ja äpplied to a mixture of concentrated sulphuris auld, Annaur
*kterida und macheankas dinuida
i). Cum antiated nitric acid ve saman to'qusher queminga,
Plecopt sodiumile added to effyl kiranna
emini put a practical application Függested by be a munitiéant, chai fjaformatiun derived from tách of the shulle reactiona.
That the quantity:ut sulphurić acid remains unchanged after the gīni tạ fiyang ôl water dcidified with a few drupe, uf Sulphurke Hevd. (Pamahiin 20
electrodes are used in the elértenkykie iz
väidiksän propürtién..
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