「八字譽事,定米隆六(萬人
|第什四次姿贴直天 | 人 三三
日二月三年二八九一屉公年一十七國民華中 育教經 T
華僑馬經
老吉主编
廿九秒五,逵黎華中, [米一分CCI,末段,仍乏好越。 方兆
本週六沙田賽馬
家哦。
六場配磅昨公報
銀禧 喜洋洋掛頭牌 海至范
雅駒步幅已見開揚
岛一時四十泥分湖面,一謂合台
确昨午公佈,掛位及緒 【今次跑日跑道,馬匹配一對
中遊之冠進步且勇
1日上午离道公佈,一位好 陇配搭将記本週四(四椰必
非徒逃一,快活谷一走中高,步大雄步不段一二來一分二十秒三,米、二起馬爭總變形,陳展中
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·喜門後由東尼 下酀力已城,送末跑千三磅,另一組改跑
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程力微亦器飛往過,通可不五十三秒四,米粉醃喃
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二期星
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日七初月二年戌壬夏
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有賽程,叛名馬匹仍見無一利,两套出隨時有機 手指 A. 第一二三四大七及難馬字「你,套,降症 快樂人 起宋兵事仍在沙田煨行,七秒四,豪和蘭酒 米林寶路二五金
动阵,提防殺個措手不及而爆牛清素。 成胯下已傳可腾,近况亦確不差,到時如有好手 在场地變化下始可考,反而「包扮好」在集 和「喜洋洋」、「夠威」馬勇而已過,只有
·萨駒他得留意的谳有「紅孩兒」、「夠成」 #思
「全感」亦蹀安陵也。..
·涉而斯也,不妨留意小最後冠擇。
此够先作餐的照片,俾供參考。 門即乏善足陳,但易阿諾森即在烘坐冷,說對乎 三出於「金手指」勝出之後已露鋒芒,再出成熟 :「司令台」周本年度自馬,在融同安胯下 輝」,但表現亦,此次如天晝出平“大可嵌 ,但一直至上月中始首慶上陣 - 這未能憋們「 如無物,近莽所見感氣那甚盛,尚有意問鼎,
科必」均羁告東尼坐骑,其中以「到烕] 委留意,此駒自由細毫勝後,至敬?陸製經-底 ...在十四匹正翔中,「發行」,「全灏」、「
二班涅弈之千二米角逐「 全日各畫賽事中,當以第一 四排位則不易遺楚也,然在 謝時有多少煦上沐,非穿透
·防盜」發肃人們』目,萏就
幸運好馬狀態佳
·突出的新榮拭八百 老糊塗
好彩赢馬被升上頂班
言心
一大人物
晒照時蝮午置佈有四匹馬开班,十一匹馬 尖週末、過會經過兩天連場大戰後,馬會評
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好,当第二班升上
第三:
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馬者派米廢僳賽瓿羆`驳登夏王县朱障郭施李棘米
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好而
第一
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雪球由多五班降下心
四重彩派近廿萬
安物、黄(由第五張升上
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發仔勁强走勢勇 提及,根定公休葉婚消息
會問,我被先外特蘭及四重彩均能天金丹 今晨沙田試閘
:每往派十九萬算六百三十七元,
,到跑馬地體育路為會行政大厦十五根椐取彩金
中獅者請於(星期二)上午十時至下午五時
茲將馬會公佈之名單列下 加述關,分成三組進行,兩組七心,一組六區下 沙田馬場於今晨七時十五分,共有甘匹馬
分成三組舉行
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匹頗多,裿筷經頭亦不少,
·携勝出京胜利主投
:. 一有二十九芪)
·總派彩六百九十萬二千六百六十八元
雄仍是頗佳。
烙號鹪名
八有八十五徒中) 總彩池八百五十七九千六百五十
“M三八
富士山:
娇,到跑馬地區會員俪地下傾取彩金, ,中彩者請於今(星揹二)上午十時至下午四
月宮
第二組
*奇能由活德主操,試三段一分卅七 輕鬆出脚整齊,收韁後亦強,試來煮好 末發廿七秒二,全程快跑。按釋完成,走閃活融
·恆勝由戴萊求操-三快跑一分廿四 ,伴築改善,上力滿足,情况良好,過未應有作 ‘威旺出助季主搡,內圈慢跑,走勢已見圾短 廿五秒i,全程快跑,走勢活潑輕鬆,効力战强 發仔出譚文就主試,三段一分一秒,末段 宋段廿四秒九,慢試要慧麟佳,傷患復元,情况 - 借家由李森主操,三段慢估一分壯四秒九·
當暢順,我仍見 狀 廿九秒,按敬而射,走勢料 十三段一分批一秒八,末段 |幸運好焦由徐雨石主墁
出上接有進。」
.末段卅秒C丸,慢跑委但還佳,身形商說來 。沙田友。:
每注东八萬三千六百七十八元
獲勝新馬全被編班
兩勝
班-茲將各朐馬名列下... 第三班
·萬頃沙,均被撬纈入第三班,其餘全都編入第四 馬先後獲勝,兩批的碗助及嬴過一仗之好威風, 馬者,均被編入還當班次,今季新馬共有十一匹
·太年度新馬,在通多個月盹後,會勝出
萬翛沙 好威風、調號。
兩捷騁馳編入三班
-為第四班
竹宇、奇利杰里、龍山、快樂龍王、光芒四
MN
P-SMSSM
3.N MN
P
118
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特快名的
雄才偉醫
第三組
和文生阳
麻你利
N三 K馬上
容笑
宇宙紀錄碑文就
七九
四五,九〇三四天八八八元
大七九九〇
联系查院方施吳師 王城郭羅
664000.
1982
中學會考試題預習專欄
化
(二十)
明德出版社朱宏林 提供資料
Chemistry (20)
Reginald. W Chu
Mill & Dale Press Ltd
Solution to 0. 28
8
MCOg+2HCY
MC12+H2O+CO2
(ii) - This is to saturate
the acid in the flask with carbon dioxide first so that none of the carbon dioxide Tiberated on
reacting the
metallic carbonate with the acid will
remain dissolved in it and the "volume of carbon
dioxide measured is thus more accurate. (iii) The reaction ia
fastest at the very beginning of.the reaction. This is because at this moment, the concentrations of
the
reactants are the greatest. It is because the reaction has completed and:all of the metallic cabonate has been used up.
The maximum volume af carbon dioxide
●obtained is 1120cm3
of mol of CO
evolved
::1120
-22490
According to the equation,
MCOg+2HCl
MC1g+Hy0+C02
no. of mol of
MCOg heacted
mno. of mol of
cogobtails
obtained
-0.05
the mass of
MCO used is
不另收費
隨報附送
禮拜出版
8
(ii)
4.28
mass of one
mole of MCO3
0.05
is, the
relative molecular
mass of MCO is 84.
Hence, the relative
atomic mass of M =84-(12+16x3)
=84-60
-24
Add dilute
sulphuric acid to the mixture;zinc will dissolve while copper will remain unaffected. Filter and the copper will be obtained as the solid residue on the filter paper. Zn+H, SO2-ZnSO2+B2 Bubble the gas mixture through cold, dilute sodium hydroxide;
nitrogen(IV) oxide vill react with the alkali while oxygen will pass over unaffected. 2NOg+2NaOH:
NaNOy+NaNO3+ǐ
(iii) Bubble the gas
(iv).
(v)
mixture through
sodium hydroxide solution; carbon dioxide will react with the alkali while nitrògen will pass over unaffected. CO2+2NaOH
Na2CO3+H2O/
Heat the mixture gently in a benker; ammonium chloride wj11 aubline: off: while sodium. bromide will leave behind.
NH, C1 ( 8 ) → NII; (8) + +HCl(g)
Add water to the: mixture; sodium
carbonute.will
dissolve while calcium carbonate will not. Filter
and recover sodium
cabonate from the
filtrate by evaporating it to dryness.
不隨禮柯多新彩無報請遠 另報拜式采穎色任販就道 收附出印多雜華§歡訂近閱 費送版刷姿誌僑 迎閱向戶
Heut the liquid mixture so as to
吳 纁 辞鄣 郵 簡 米 卡
distil nitric acid
over because
concentrated nitric
acid is volatile
while conc
sulphuric acid is Don-volatile.
(vii) Pass the gas mix- ture through conc sulphuric acid; ethene will react with it to form ethyl hydrogen sulphate while ethane will pass on unaffected. On warming the ethyl hydrogen sulphate, ethene will be liberated and recovered.
CH=CHy+H-HSON
CH_CH HSO.
(viii)Pass the gas
-mixture through
powdered palladium; hydrogen gas will ve adsorbed while carbon monoxide will not. On warming the palladium powder, hydrogen will be recovered.
Add the solid mixture to some carbon disulphide; sulphur will
dissolve while iron will not. Filter and evaporate the filtrate to dryness over a water-bath to obtain the sulphur. Add:the mixture to some cangtie soda: pr caustic potask; zinc (TI) oxide, s being amphoteric, will: disanlve while magnesium oxide will riot.0
filtering, magnesium oxide will leave behind
as the residue. ZnO+2NaOH+HD0
N3 ̧Zn(OH)
Solution to g. 29
8
(1)Some of the
copper(II) oxide turns from black to reddish-brown
powder due to
the formation
of copper.
(11).
(2)Anhydrous
copper(II)
sulphate turns
from white to
blue due to the presence of water."
Cuso
-5110
(iii) This is to prevent
the moisture in air from eutering into the apparatus. Mass of water formed during the experiment
(iv)
(vi)
-gain in mass of
the u-tubes with Cuso
=(37,375-32.362)
-5.015g
Mass. of oxygen in
the water formed -loss in mass of
the boat with copper(JI) oxide (10.590-12.147)
4.4438
mas of water formed =5.013g" and, oxygen in water formed -44455
made of h hydrogen in.
the water formed (5.013-4.443) -0.057g.
Wence,'the ratio of of II to 0, by mass, in water =0.057:4.443
1:7.79 -1:7.8
d
(vii) This is to ensure
that any water detected must have come from the reaction between copper(TI) oxide and hydrogen gas
8
A saturated hydrocarbon is a hydrocarbon (ie.
a compound: containing only hydrogen and carbon atoms) in which all the atoms oreja joined by single covalent bonds. (ii) (1)Ethanol,
CHICH, OH
(2)Propanoic acid,
·CH CH COOHM
(3)Ethene, CliQ=CHy
fi)(1)They are;
黯
JECCI
C1 Cr
2-dichloroethane
and:
HH T.1 I-C-CCI
I.C1.
1,1-dichloroethane
(2)They are known
as structural isomers because they have the same molecular formula but. different structural formulae.
Solution to 0.30
A is iron powder; Bie hydrogen gas; Cis iron(II)
sulphate crystal D is iron(II)
hydroxides.
@
| MM.
E is iron(III)oxide; Fis iron(II) sulphate; ?
G is iron(III) hydroxide;
X is sulphur dioxide;
Y is sulphur
trioxide.
(ii) (1)Fe+H2504
→FeSO4 + H2
(2)2FeS0 ̧·7H,O
·Fe20z+S0q+S03
(3)Fen0g+3HQ$0
• Feq (S04 )z+3
(4)Fey (S0g)s+thNa OH
*2Fe(OH) z
+3Na2S04
(5)FeSO+2NaOH
Fe(OH)2+Na2SO4
(6)4Fe(OH)+02:
·2FegU3+4Hy(7
Use carbon monoxide. (or hydrogen or. carbon) which can
報日僑華閱訂期長請
5
491181
reduce iron(III)
Pey0g+3C0
oxide to iron.
2Pe+3c0y
The gas obtained at the cathode is
is
hydrogen and that at the anode oxygen.
the cathode:
2H+2e
At the anode:
OH
-211
iii) (i)According to the
equations in (ii), it is noticed that the same amount of electricity can
(iv)
liberathan
moles,
R much ivdrogen as that of oxygen.
gaa liberated could have a volume twice as that of oxygen gas.
(2)This is because
both hydrogen: and oxygen gases are slightly soluble in water, but they. dissolve in
water to a different extent, 30 the
2:1 (BL202)
ratio cannot be obtained in practice.
The conduction of electricity through dilute sulphuric acid depends mainly on the mobile ions. in the liquid while that in a copper wire is mainly due
to the movement of the free electrons,
經包專新歷 僑濟羅刋聞史 稱報萬豐翔悠 許導有富實久