· 3 APR 1968
三期觀
日三月四年八六九一腰公年七十五國民華♯
#*#*
日六初月三年申戊蔡夏
WAH KIU YAT PO
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1968英文中學會試題頂習専
SPb(NO3)2\
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1968 中學
學試試題預習專欄
英文科
(廿三)
王挺生、
TEST 22
TIRO AL LUMEN 20 simtes.
1. Change the underlined words to the plurai. Į HaRE }
other necessary changes.
(b)
The child had a cạp on his head.
This is a good book.
(c) "bere ie an ox in the field.
(0)
2. Some punctuation marks are missed out at the **.
Put the correct punctuation marks clearly in the brackets on the right.
Example: "What are you doing "
She siad X "I don't do it."
I don't know where he lives X
"Do you smoke X" asked John.
(d) I have seen the picture I too. (e) What a day 7
(a)
1. Change the following into indirect -speech i Bample: Re said to her, "I am very happy.
He told her that he was very happy.
H
+
He said to her "Please lend me your book,
The teacher said, "Why are you so late to schoo
John said to Mary.** am not going to school.
He said sadly. "My dog died last night.'
He said, "Where are you going?"
4. If the word ends in an 'ID' sound, write 10.
Example counted D
If the word ends in a'T' sound, write T. Examples faced *
(a) divid
If the word`ends in a 'D' sound, write b Example: cared D
(b) crossed
(a) boiled
(a) brushed
(e) barked
lead nitrate
[litharge)
nitrogen
(white crystale)
(yellow
ioxide
化學科(廿三)
solid):
王錦釗、
SZYBOR
Chemistry (2)
1. Digest the mixture of sodium carbonate and 14 carbonate with sufficient water to dissolve ali
the sodium carbonate. The mixture is then filtered. The filtrate, sodium carbonate solution is collected in a beaker, while the insoluble lead carbonate remains in the filter.
(1) To the filtrate, add dilute nitric acid unti
no further action takes place.
Ba2003
20-3 2003 CO2+ 820
The resulting solution than consists of a solution of sodium nitrate with some nitrio saio (as an impurity). Heat the solution to evaporate the water until it becomes saturated with sodium nitrate. On cooling the solution, by surrounding
freezing mixture, a large crop of #odium nitrato crystals will crystallise out or solution and settle to the bottom. The crystals ara removed from the solution by filtration. They are then dried in a drying oven.
it with
(ii) The lead carbonate in the filter is thoroughly' rinsed to get rid of any, sodium carbonate, The solid is then transferred to a beaker and dilate nitric acid is added until all the lead nitrate has dissolved.
PbCO + 202 =
Pb(NO3)2
• COF. M2O
*=* PÓFULLang solution or ione nitrate, with a little nitric acid as an impurity, is bested until the solution is saturated. The solution is than cooled, and a large amount of lead nitrate will crystallise out of the solution. The solution) is than filtered, and the lead nitrate cryn ta la are dried in a drying over;"
Action of Eat
(a) The first difference between the action
heat që godit and lead nitrates is that whom, lend nitrate is heated, deorepitation takes place, whereas this does not happen when modium nitrate is heated,
When both nitrates are heated they gascapose.... Sodium nitrate gives off a colourless gan, axygen, while lesd nitrate gives off a brown gaa,
(a) With sodium nitrate, the residue obtained is
sodium nitrite.
25ANO
nitrate
sodium nitrite
oxygen... (colourless gaa)
with lead nitrate, however, the residue is Lead monoxide.
Load nitrate:
Heat!
URZAKO *
Frees ing
Mixtura.
Liquid
Some lost nitrate is heated in a bard-glass
tube. The mirture of the two gases evolved, sitrogen dioxide and oxygen, is passed through \ a U-tube insread in a freezing mixture. The reddish-brown gas, nitrogen dioxide, condensOS AN a yellow liquid (if pure) in the U-tube and the oxygen passes on. Usually the liquid is green in colour owing to the presence of dinitrogen trioxide, N203, which is itself a blue liquid, (1) Nitrogen dioxide reacts with cold water to
form a mixture of nitric and nitrous aoida.. As a result nitrogen dioxide is sulled a "mixed anhydride".
20
+ 120
•
HNO3 + INO,
nitria acid
nitrous aoid
(11) Nitrogen dioxide reacts with hot water to form nitric acid only and nitric oxide is given oft.
2002
HNK
HNO2
The nitrous acid is an unstable sold which rapidly decomposes into nitrie sola and nitric oxide.
ЗНО 2
.
HNO-3 2001. 820
(iii) Witrogen dioxide oxidisas damp sulpow
dioxide to sulphuris acid
R02
•
802
•
8.20
H230
#o 1
This reaction forms the basis of the Lead Chamber Process for the manufacture of sulphuric acid.
Mitrogen dioxide supports combustion only or strongly burning substances. Thus strongly burning magnesium will continus to burn in the gas with the formation of magnesium oxide-and nitrogen.
▸
LNO 2102
⭑
#2 f
5. Write the NUMBER of the correct word in the
--Oge each, word-once only.
Exampler e pair of
a crew of
a orowd of
(c) a fleet of
(a) a library o (e) a piece of
(1) anipa
(2) chalk (3) glasses
(4) books
(5) sailors (6) people
6. Underline the correct word is brackets »
(a) y. (old, older, elder, eldest) brother is
(old, older, elder, oldest) than I.
(b) David is the (tall, taller, tallest, mosk
tall) in the class.
space.
(o) Did you zen Í anna, any. each. Iittle) people
thera?
(d) He has (more, many, much, sost) coney than
John.
(e) last night, I went to bed (later, latter.
lately, late).
#. Read the following carefully +
In 1865 Jules Verne grote a famous book called 'From Earth to Moon', 41 though the story could never happen, many thing in it could be true. Here is the story.
The Oun Club was a club in âmerica for we who plan and make guna. a man called Barbicane, the President of the Club, thought that he could hit the moon with a shell shot from a gun.
"a good soldier can hit e circle two inʊmwe across from over a hundred yards away," he said. "Surely sa can build a gun to shoot a shell which will hit the moon, Although the moon is a long way off, it is two thousand miles across,
After making careful plans, Barbicane and bis friends dug a hole in a mountain near the town of Tampa in América. They built a large gun in this hole. The gun was nine hundred feet long, They planned to make the shell from a saw notal. weighed less than stell but it ego iuch stronger than steel. Rich men all over the world sent money! to build the gun and the shell.
'It
Barbicane and his friends receivad many good wishes. One day a telegram arrived from
France.
KAIK SHELL 18 PLANNED AT ME AND I WELL GO IN IT TO DER, MOON
MICHAEL ARDAN
-The man's fool!" cried Barbicans.
“Nothing is impossible," answered Dr.BGLISS».
hie friend.
Underline the correct ansters Y
fa) BarbicaOS
1. wrote a book called 'Fron Earth to Moon' 2. was the President of the Gun Club,
5. ma the san vão sent the telegras,
4. ma a good soldier.
(b) The hole for the gan VLO
∙1. near the Gun Club
2. on the mooņu
3. near-Tanța.
4.. in FrancE.
TESO ILOG Matal-for the che13
1. lighter than stuði.
ne Tibery as steel.
rong sa: steel.
́2Pb(NO3)2
2P60
lead nitrate
Lead monoxide
nitrogen
dioxide (brown fumDO Į
#nen autonium nitrate is bested in a test- tube held in a horizontal position, dense white fumes are given off, and at the same time the mammonium nitrate melts. In the cool perta of the tube, a white solid is formed, and dropa of a colourless liquis sondenss. When the boating is continued, there will be ne residuo and the last trades of the salt vili £szompose with explosion.
Questions for next week (24) -
1. Describe the labore tery preparation and omllection:
of nitric oxide.
How would you (a) distinguish altrie oxide from nitrous oxide, (b) remove some nitric oxide present; 18 in impurity in nitrous oxide, (a) obtala nitrogen from nitria oxide?
dhat is the use of the "brown-ring* test? Describe fully bme you would carry out the teat Said account for the formatiom of the brøen ring....
LIBRA
If a glowing splint is held at the noută of the tube, during the experiment. the anlin will be rekindled.
2. #trogen peroxide is prepared in the laboratory"
by the etion of heat on lead nitrate. Lase di trúfe is used Secluse it to a heavy metal nitrate which contains co water
and is not deliquescent
paclus
4. neavier than
oformulation and
ataol.
(d) The telegram was sent by
1. Jules Verns.
2. Barbicane.
3. Michael Arde....
4. Dr. Belfast.
(e) Many things in the stery coulo
surprising because
the book was very famous
true.
30
2. the book was written a long name @go+
5. the atory could never happen
4. most stories are not true.
(f) Barbicane said that Ärdan vas à TOUL OECKU.
he thought
1. Ardan was not rich
2. ardan could not anke a shell.
3. it was a joke
4. it was impossible.
Change the following sentences into the degave: Forms
the
Kr. Lee will come with/policeman.
The baby had been crying for a long time.
The travellers lost their way in the forest.
E saw ber going to school yesterday.
The teacher will punish the lazy boy.
9. Underline the correct word in bracketa +
(a) He lost his money and had to (lend, aas.
borrow, find) agne from a friend.
(b) The beggar (demanded, blamed, thankwu, requeswaÚ A
pleased) the woman for the food.
(c) She could not (dany, answer, think, szeply,
socept) such a hard question,ma
1
(4) Ho vàn (disappointed, hungry, tired, angry,
'afraid) and slept for a long time.
(6) That clever boy hás (given, lost, guarded, won.
-missed), many prises......
A farmer, wishing to buy fertiliser, Tinda that i be can buy a tes of ammonium sulphate for the sims cost me a ton of sodium nitrate, both is m ressonable state of purity. Which is the wort economical source of nitragen?
Why are nitrogenme fertilisers added to the soll?) In what way, other than by chemical fertilisers, cas the farmer renlenish the nitrogen amtent of hia mail?
T
Ganderline the correct word in drackets
(a) Shs 18 careless (for, to, of) her dress. (b) The pupils were fond (for, of, to) work. (c) They were true (to, for, with the king. (d) Benry was very kind (for, with, to) the poor. (e) I saall not agree (for, to, with) you. (f) She cut herself (by, eith, at) a sharp knife. (g) Please draw a straight line (by, with, for) a
ruler.
[h] The boye quarrellad (for, between, with) the
girla yesterday
(1) Don't worry (about, tor, mon, your examination. | (5). The top of the hill is covered (with, by. into)
snow,
Answers to TEST 21
1. (a) wonderful, (b) present, (c) examinati an. (4)
badly, (e) truth.
2. (a) hear, (b) X, (c) root, (d) colour. (e) *, (f)
very, (g) key, (h) x
1. (e) at. on, (b) by, on, to on. (a) at, 10, 10)
on. on. (r) by in. (g) at, in. (h). at, (i) at,in. 4. (a) march, (b) seema. (c) serious, (d) next, (e)
great, (r) struck. (g) foggy, (b) should, (1)rowing 5. (a) hio. (b) her, (c) sur, (d) their, (e) your 6. ago. fine, walked, cages, tree. lunch, asleep.
tight, shilling.
7. (a) hobby, (b) so many sooks in the world that so
could never know their number, (c) part of, (d) story book, (e) something happened in the past.
D. (a) ID, (b) D. (a) r. (a) 0. (e) T.
9. (a) "I have written you a long letter," George esi6.
(b) "I am going to Macau with Jean,” Henry said. (0) He said to me.“Can Janet speak English?” (a) The teacher said to David, “Stand up.' (e) se uniả to se. "There does she live?”
10 (a) Bnd the made up her mind? (b) Did they not
go there last night? (o) Had the old sạn-Hurt any- body. (a) Did he think that he would pass the @xamination? (a) Md the children sant any thi mar
to ant?
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