22 MAY 1968
TY FRAKEN
日六廿四年甲戊摩
育僑華
WAH KIU YAT PO 輕
11968
0968
英文中學會試題 化學科 ( 三十 )
習専欄
2,
王錦釗、
Chemistry (30)
#
華
大頭額習書酒
三期星
日二十月五年八六九一零公年七十五國民中
men 9.
all 10.
She:Cabany and New
5
英文科
(三十)
何玉柱 •
XXX
hin
1. He didn't get the job.
as soon
Answere
to
Revision Exercise II:
2.
He a
He forgot to
4.
why his quarters were
He ought to have wanted to meet us here.
territories have come and learnt much,
III. Complete each of the following sentences by
writing in the blank space the most suitable ex- pression you can find from those given below.
The manager
as he set eyes on
him.
new leaf in his life. the water, that was mess yesterday.
器
earlier if he
+
5.
We had suspected him but he quite innocent.
to be
turned
L (a) Put a little of the solid in a test-tube, and
digest it with water, If the solid is insoluble in water, the substance is lead carbonate. To the suspension in water, add dilute nitric sold, Effervescence will take place and carbon dioxide, which will turn line water milky, will be liberated.
-
PbC0g + 2H803 PD(NO3)2 + CO2 ↑
lead nitra te fin solution)
H20
(b) If the solid is soluble in water, add dliute"
hydrochloric acid to the solution. If effervescence takes place with evolution of carbon dioxide, the substance is sodium carbonate.
N03 + 2HC)
·
2NaC1 + CO2f + H2O
(0) If in (b) there is no offervescence, the
substance is either laad nitrate or sodium nitrate. Discard the solution,
Put a small amount of the original solid in a test-tube and heat it gently. If the solid decrepitates, and gives off copious brown fumas of nitrogen dioxide, the substance 19 lead nitrate.
2Pb(NO3)2
•
2P60
2
+ UNO21 + 21
I. 1. The proud mother said (that) he(her son)
was very clever and asked whether her friend thought s0.
She asked her brother what would happen next and whether the police would ask him to report to the police-station.
3. The teacher told us that China is one of
the oldest countries in the world.
The teacher told the pupils to be quiet and sit still if they wanted to have story-telling then.
II.A. There has a rumour that the coming S.CCE.
is going to be very difficult.
6.
Explanations were of no use because he was too prejudiced to listen to reason.
C. Being very tired, he decided to lie down as soon as he sawI a soft couch of grass under the trees 60 as to gather strength from sleep.
D.
No sooner had he said that she would come soon than she came,
E. He may succeed provided that he works hard F. He took an extra pen to school in case
pen ran out of.ink.
his
III. 3.
was
2. told
4. samelor:rnad just comel 6. geard
7.) was
3. had arranged 5. was 8.. had been look- 9. being suspected
13. to persuade 16.18
ing
10. to carry 11. oppose 12.. to talk
14. Being 15. enali have 17., gained
19shall7get a promise,zadejby the speaker 1 20. have talked
18. will try
AV.
1. X
2. the
4,78
>. The
6. the
7. the
IV. 1. of 6..by
2. since
en.
for
9.
4
VI.1. Gre
2.50
pull
8. unhappy
embarrassed
6eight 9-Tepaired
admission
2. appearances
4. explanations
5. ENT
turned down, turn in, turned in, turn on, on; turned over, turns over, turn up, turned up, turning off, turn off, turned off. turning out. turned out.
IV. Write out a suitable form of each of the verbs
in brackets against its number on your answer Bheet.
บ
This early morning. I 1. (have) a nightmare.
I a. (dream) that some burglars 3.(break) into my house. One of them 4. (hold) a dagger in his hand and with this 5. (point) at me, the rest 6.(bind) my arms and 7. (gag) me.
the room.
Then they 8. (begin) to search
But 9. (see) there was nothing worth 10.(take), they got angry and 11. (shout) at me 12. (ask) me 13. (take) out all money I 14. (have). When I told them I was as poor as they were, they 15.0 lose) their temper and 16. (hit) me on the head. I 17.(wake) up to the blow. Nearly 18. (fall) off my bad, I found my son 19. (atand) by me with à broad smile; in his hand he 20. (still have) hie stick-candy-
Complete the following sentences by adding A. AN, THE or SOME, if necessary. Write X when not necessary.
A. Would you like l
lead oxide (residus)
(d) ir ao prown rimes are given off in (c), the
substanca ja sodium nitrate. Take the same test-tube and heat it strongly. The solid will fuse and change to a pale yellow liquid. A colourless gas, oxygen, will be given off, which will relight a weakly glowing splint.
2NaNO
2NaNoz
021
4, had better
bill
to quit
receipt
Revision" Exercise III
10, the
5. of
1. Combine the following groups of sentences
llowing the instructions given in
the brackets.
A. I like reading, My sister likes reading. (Usež
BO)
8. He could not comË, fe had
(Use: owing to)
susie during 2.
tea time?
B. 3.
4.
see well people usually cannot dark.
10
undrelia? I seema
C. Why don't you take 5.
to be 6.
wet day
D. He had flown over 7. times but this was 8.
ăn 9,
Jet-plane.
8. Though it is a small town.
Pacific for many first time he flew
there is 10.
university which is very good,
V1. Complete the following questions and add short
eplies as in the examples:
Examples: (1) "He is your brother, isn't he?”
"Yes, he is." (2) "He was
wasn't
a student of this schoo1
"Yes, he was.'
A
bad beadache.
C. He may apply for спе the job. (Use:even if)
post...
пе
W211 aot get
1
Be is one of
*
She does not
"Tom eats three bowls a meal. "Yes. "Be dust do it alone, "yes,
#
3
0.001 tim nitrite
2. (1) Bencentrated sulphuric acid
The affining of sulphuric acid for water maken it useful as drying agent for such gases and liquids as it does not attack, The dzying is not complete, but, if intensive drying is not required, sulphuric acid is the most convenient drying' agent.
It cannot be used to dry either ammonia or hydrogen sulphide, Ammonia reacts with sulphuric acid to form ammonia sulphate,
2NH3+ H2SO4
·
4
ẢNH, 201
while nyarugen sulphide reduces sulphuric acid to sulphur.
H2S04+ 385
-
420 + 43
Carbon dioxide and hydrogen chloride do not react with sulphuric acid,
(11)used calcium chloride
Fused calcium chloride is exceedingly deliquescent and hence finds a usa as a drying agent for liquids and gases, It is not possibla to dry a gas or liquid completely with calcium chloride.
It cannot be used to dry ammonia, for the two substances react with each other to form compounds such as CaClį
CaCl2 + H3
4NH3 CaCl2
•
AN.BG
D. Some people are very cunning.
then. (Use; one of those)
E. He wants to call on her today.
want him to call on häbi sades (Begin with: She would rather)
F. "Never do it again." That was what mother
told me. (Begin with: Mother told)
G. He had a bad cold. He still went to take
the exam. (Use: in spite of)
She likes the
E. The blue dress is prettier.
snite one better. (Use: even though)
I. He has an innocent look.. Everybody is taken
in. (Begin with: Everybody)
3. "Help! Help!" She shouted.
He heard it.
He went immediately to her rescue. (Begin with. As soon as)
II. In each blank space, one word 18 missing, writa
ach missing word against its number on your an- swer sheet.
was 1.
the firat 2. 1968 that we started this centre 3. Blind people 4.
5.
to learn 7.
April,
all nationalities may
their own "aceon,
itre 6.
"You ought not t.a have said that of No.
Mary and Marhta are sisters
***......
?"
#
She used to cry when she was alone.
"Yes.
suppose he is your · son,
བ་་
*There are at least four hundred questions.
A
there are only one hundred."
"He never seens to be able to say anything properly.
"No.
9. "They'd better burry.
"Yes,
*
in your cote-book.
10. "You must hand
"
I needn't."
@act, blind
1968
24
soon Décomsa covered with a gelatinous skin of metaphosphoric acid which screena the unused pentoxide from further action.
It cannot be used to dry ammonia, för
phosphorus pentoxide is an acidio oxide.
Hence the two substances with react to form ammonium phosphate.
(接第六張第二百)
英文中學會試題預習専欄
物理科 (=+)
陸永熾·
(111) Cálofum ozida
Calcium oxide reacts vigorously with water, mach heat being evolved and calcium hydroxide being forged as a white powder,
C&O + H2O
Ca(OH)2
This property makes quicklims useful as a drying agent in cases where the more rapidly-acting calcium chloride or sulphuria acid- cannot be used, Aumonia is therefore dried with onlcium oxide,
Calcium oxide is not suitable for drying nyarogen chloride, carbon dioxide or hydrogen sulphide, for, although, calcium oxide does not react with these gases in the cold, it will, when heated, react with them forming the corresponding calcium salt.
(iv) Phosphorus pentoxide
Phosphorus pentaxide reacts vigorously with water, giving out much heat.
P205 + H20 TAP03
P205 + 3H20
M
In18 property of combining with water and forming non-volatile metaphosphorie said renders it most useful for removing the last traces, of moisture from a gas airsady partially dried. It is useless, however, fos removing large quantities of moisture. for it
3.
(1) potassium chlorate
(11) Ammonium nitrate
(iii) calcium carbona tə
(iv) ferrous sulphate
(v) lead nitrate
4. (A) Four sufficient carbon diaulphide on to a small
quantity of the mixturs contained in a beaker and stir thoroughly. The sulphur “will dissolve. By filtration, the solution of sulphur in carbon disulphide is removed, and the insoluble iron dust will remain in the filter. (b) The solution of salt is put into a distilling
flask to which is fitted a Lisbig sondenser. When the solution is boiled, water is driven off in the form of steam which condenses back to water in the condenser. The water so condensed is collected in a flask put at the lower and of the condensar.
(a) Pour some dilute nitric acid on to a sma 1.1
quantity of the mixture contained in a beaker. The lead carbonate will react with the nitric acid, liberating a gas, carbon dioxide, and forming a solution of lead nitrate. The glase is separated from the resulting mixture by Filtration, the insoluble glass being obtained in the filter.
(d) Pour, a little of the mixture into a beaker of
water, She' 'busty pondéred glass partíales will sink, to the bottom of the beaker, while the light' powdered charcoal particles will float On the sunrace of the water. Remove the floating sherocal particles from the surface of
thamid teemad pit the wet charcoal into a drying oven to dry.
1.5 Chino,
The E.M.F. of the battery is 30 volts.
(a) Eat the length and diameter be land o
respectively, then
d2
mas - 8.93 % #
z l
·
• 4500 kms
8.937d2 £.
Resistance **
4x 4500
1.8 x 10 x l
- 14.7 ohm
16.7X62 -
- 4. X 1.8 x 10
Divide (1) by (2)
8.93 l
14.7
4500
(1)
-6
- V PORN V AA
(2)
1.8 x 10
4500 x 1,7 x 10
6.93 x 18
L. 6.4 x
તુટ
10%
-, 642 metrum
4 x 4500
8.93xx 6.4 x 10
= 0.1.0
ans. The length of the wire is 642 mtran, the
diameter of the wire i8.0.1 cm.
ח?