FIRHEN
日九初月正华申伐靈
WAH KIU YAT POZEM
1968 P
中學入學試試題預習專欄
1968
英文科
十五
王挺片、
化學科 (十五)
剑
Chemistry (15)
1. a) The Fraach process is the method by which
sulphur which occurs in beds at depth of about 500 to 1500 feet is brought to tha surface f the earth in a fairly oure form.
Time allowed.
20 einutes.
faderline the correct answer in the brackets i
(a) My neighbour agreed to look (into, for, through
after) my garden while I was
on boliday
(b). He was almost knocked (under, down, off, back) hy
* bus
e) Our garden gate is made
gy mistake. (*) Does this here?
(by, out, of, into iron (with. For at. against)
pen belong (with, for, to, on) anyone
Put one of the Following wơ để ta each blank space fise a word once only
18 he late again this corning?
Did he dies the train?
often do you play football?
#1}} the boat arrive? At four
when, how, which, who, whoa, whose, why
(a)
(b)
(0)
o'cloc..?
(a)
team?
(a) In
mim?
æ } ! be chosen captain of the
season do not poopt
Brill in mach blank with one
Section A
נו.
theRA IOTIS F
but.* because, if, and,
(a) Be said good bye to his mother
went away.
(b) Renry 10 tall
(c) You can go with me
(1) I don't know
not.
(*) He could not Cinab
very tired
Section B
Jack
is abort
you like they will go
the
work
before.
of
since, unti).
(a) She turned the light
to work.
(b) Re fled away
killed,
(:) It te a week
commenced.
(d) Bow long is it
Hong Kong
(e) will not be iông
who began
ba emila have
the holiday@
you returned to
no comes
**g Underline the correct word in the brackets.
(a) This book is mine and that is (your, yours! (b) The car is (my, mine).
Can you do it (myself, yourself).
Your pencil is sharp, but (their, theire) blunt.
(*) Between you and (1. me) ate the shole cake. 5. Read the following passage carefully 1,
Have you ever noticed how busy our
are becoming? Every your more and more care are using them, Already in such countries as America alhost every family has a car, Many accidents happen because cars are nor made to travel very quickly. Also, paopia raste tipe and money wyary day, as long lines of care ornel into towns 11 -haré to find parking spaces.
Vide, smooth, straight roads must de
VAS
in place of the old and narrow rosis. 'These, rond¤ “must be built now in place of the old and năng-of roads. These roads must not pass through townS Mcities. They must not be crossed by other roads.
Today such roads are being built in many 'apuntries in the world. These roads have at luaat/ -two lines; one for slow-moving traffic and the otherë -for fast-moving traffic. These roads do not paeD ---through towns and cities; horses and cycles are Got *allowed on them. Accidents do not usually happen.
Cars ono travel hundreds of milea without harjag to stóp. so engines and brakes are not wors.
But these modern roads often cannot
De
*
In this method three "concentric pipes drilled into the ground into the sulphur
deposits. Superheated water at 170°C. 13
Sunde 4
115
13
down the outer pipe, and hot compressed forced down the innermost pipe. Too suà phùr which melts at 115°C. liquid. and is forced to
water
13
1
then turned into # the surface throw the central pipe by the great pressure of t. 3
and air. A frothy mixture of water and sulphur flows out of the pipe. The sul nur 15 Allowed to solidify in large wooden settlig : tanka where the water is run off. The sulphor thus obtained is almost pure, and can be used for almost all industrial purposes. Alternatively the molten sơ phur le ccaled and soli'Wied on conveyer belta moving over shallow tanks of cold running water.
Compras sed
Liquid sulphur
hot air
and water
superhea ted
wate
under pressure
4.30
quick sand,
Sulphus.
(b) (i) Salch
ae bydi in a 11
249
500 ft.
to
1500 ft.
oride petroleum gal which can be burned
sir to gi»- sulphur.,
• 29
A
(11) Julpour 18 obtained from the spent oxide
which is recovered from the purifiers in the gas works. In the manufacture, of così ga*, hydrogen sulphide ià, removed in the purifier by resokkan with moist ferpic Xoxida
}
ETSIAAL-E NTC+49
c. (a) When some powdered roll sulphur is beated gently
in a test-tube, the sulphur firat maits to an、 amber-coloured mobila liquid at 115°C. 2011 » sulphur consists mainly of 2 -sulphur.
As the beating is continued, the colour of
the Liquid becomes brown, and it beçonne very viscous At about 160°°C., the liquid is so viscous that it cannot be poured out of Last-tube.
the
On further heating, the liquid becckas almost black in colour, and it becomes mobile again, but it never quite regains its former mobility
AL
Lespe Fature of belicha 6°C 1 molten“
Snjohur holla ~nd a pale yellow vapour D given off
kin the sulphur is han Lea 10 the liquid state, the changes in col sur and viscosity which are produced are dum to the presence of two forms of liquid #Tphur, a-sulphur and 4-sulphur Az temperatures below 160° ow
-sulphur is present In sulphur, but at higher temperatures Gore -sular" is formed, When 7-sulphur is cooled slowly, it is turned *into monoclinic sulphur, and when A-sulphur is
cooled suddenly, plastic sulphur As obtained.
(b) An element which exists in more than one form
with different physical properties, but with the same chemical properties is said to azhibit allotropy, and the different forms tre called allotropes or allotropic forms of the siement. For exampla, diamond, graphite, and coke are allotropes of carbon. (1) Preparation of monoclinio sulphur
Dissolve powdered roll sulphur in hot toluens ip • boiling tube. Wrap some felt round the tube and allow it co stand. The solution crystallizes above 96.5% to gim crystals of monoclinic sulphur. (11) Preparation of rhombic sulphur
Dissolve söme powdered roll sulphur in carbon disulphide în a beaker, and filter the solution into a watch glass. Allow thi solution to avaborate slowly. Pale yellow octahedral crystals of rhombic sulphur will then separata,
(111) Preparation of plastic sulphur.
Heat some sulphur to the boiling point in a boiling tube. Pour the boiling liquid sulphur into a beaker of cold water. 2 transparent non-crystalline umas, which fools like rubber is formed. This rubber- like masa which is known as plastic sulphur gradually sets to a hard nee5. (iv) Preparation of colloidal sulphur
When sodium thiosulphate solution is
treated with dilute hydrochloric acid, colloidal sulphur, an amorphous form of sulphur is formed. Colloidal sulphur is insoluble in carbon disulphide and 1t. cannot be obtained as the residï"" Zil List fon.
Sodium
201
pafosulpha te
2HC1
ZNAC1 -
50zT
flusst ions for next smak í L
1
GKONG STIGTÏBRA
[in towns and cities. Before a road in a town-can be
wider 3 many buildings have to be pulled down. people feel that more car-parks should be mufli de # city. Then the drivers abould leave their and catch a bus or take a taxi to their offices
riifs the correct engwere i
byone has a car
2.1 10 hand to park Qere.
niacoidente happen. sfy family has a car. #ronda sust not have
2, arobarosás....
4. two lanes.
Engines and brakes are not earn becâu đà
accidents do not usually happen. generanda have two Lease
-care cap travel a long way without Gaving
LO STÖD,
4. the roads are vary wide.
(4) Somą people think that outside a city thera
should he
1. aore Bugea. » 5. offices.
e. car-parks.
taxia.
(e) Bug ronda must be built because.
16 cara can- nõu: travel foster
L
2. only good rosas jain countries.
3. the old roads are too atraight
4.
there "are many sore, care" to travel on thes,
{f} ft 10. hard to build new road # ta towas buBRASÍ
«ttle hormow’and cycles/go chure
$2, there are too many cara
13, there are fee parking spades
4. many-but id ings would have to be pulled down. Punctuate the following sentences
Put to full
stops, commua, questien marks or @quiamstian marKS and capital letters where necessary i
he said to me what are you doing
we visited london ehere robert livad för ten year
how clever Ajan
has jane uvær tell item
#fl) Teturn hong kong in june
When
ia used up it is called 'spent özfas Un axposure to sir Sreconverted to ferric
and moisturs`it oxide and sulphur 19 (orms 12 –
270293
30.
65
1. Put a word ip sach blank. The word you write diet
be the correct form of the sord given an the left. (a) cheerful
b) exact
(e)
untidy
d good
ohey
The man Laughed
Ae had
He failed because he #To te He did ft
a dollar
The dog did as he can told and eat
dava.
8. Fill in the blank with the right word, which is |
chosen from the given list •
top.. saved. and. thy raty, 3... one, bigh . on. ran. ravenhage. about, too, of
A
time.
crow was once mo (1) that ne thought a @ould (2) if did not 'soon find water After aone (3) he ane s jug (4) water" but, then ne flew down to it, he found that the water was (5) low [A the júg for him to be able to reach it. He was (6) to go away in despair when he thought of a plan. Fetching a few pabbies hé droppad them one by (7) isto the jug. This made the water rise (9: *nough for him to be able to reach it Thus he (9) mis 11fa by him (10).
9. Turn the following senteņi
2
Describe the preparation and collection of severB. jars of hydrogen sulphide, starting from powdered sulphur. Describa experiments to show the action or the gas (à) as a è orbus táble substance, (b),sə- reducing agent, (c) as an acid forming salts. State the conditionis. necessary for each reaction and the produe to formed.
What
is the test for hydrogen sulphide?
What gases are evolved when concentrated sulphuric scid ią warmed with (a) sodium chloride, (b) sodium nitrate, (c) sodium formate, (d) sodium oxalate? what would you observe and explain what happens, wbeni concentrated sulphuric sold is added to (e) anas sugar, (f) paper, (g) blue crystals of cuprto sulphate ?
) Mr. Wong said that he was going to London.
Jane said that she had received some good news,
Be asked her what
she wanted
She said to him that be #8 #rong.
Jone sold that he liked the cat.
Answera to TEST 11
1.
the, (b) an. (c) the, (d) the. (s) an.
2. (a) Im. David the clevermet, bay in the classi
(b) Could Jane drive the car?
5.
the board with a
Shall we have a holiday to-morTON? Did the carpentèr nai 1- banner?
for. (f) with
Did the beggar vant anything to dut? of. (d) from, (o) of, (d) to. (a) by.
(h) fron. (1) or, (3) between.
4. (1) ait, (2) had est, (o) told, (d) nas broken, (5) Can you tell, (6) stood. (7) did you do. (8) maked, (9) maid, (10) was kicking.
5. (a) 4. (b) John, (o) aeroplane. (đ) 1.on business,
(e) 1 a middle aged man.
6. (a) T. (b) ID. (e) D. (a` ID. • D
7. (a) either, or, (b) whether, (o) who, far but,
(e) While-
8. thes, his. him,
(0) (10)
9
into Direct. Spacch
out. their.
one of aire, (b) think 00. (c) did you pay for *1** (d) - "No, it isn't." (e) do they?"
¡0 (s) minutes, (b) stop^ed aoving, te) tried not te
· be seen. {d, ana-pleased with the darkness. (■' all the windows to be faskened.
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