真二第張七第日四十月三年寅丙圈夏
WAH KIU YAT PO #
1986
A. 3 c. 6
D. 5 D. 7
中學會考試題預習專欄
31. Which of the follow- ing solutions in the
化學
(三十)
Wonst conductor of
electricity?
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B. Molar ammonia
solution
C.
Impure water
Revision Exercise
for
Cert. Exam, (1986)
CHEMISTRY (30)
1. L. CHƯ
MILL & DALE PRESS LTD. 26. Whon dilute
hydrochloric acid in added to the solution of a solid X, white precipitate is observed which.: disappears on
henting. Which of the following substance is most probably the solid Xy
A Lend(II) nitrate B. Silver nitrate
·
C. Lend(II) ailoride D. Potassium sulphate 27. Which of the follow-
ing metals will NOT liberate' hydrogen gas from warn
concentrated sodium hydroxide:
A. Magnesius
B. Lead
C. Zinc
D. AluminÍUM
28. The solution of a.
-solid X gives a white
precipitate on
reacting with acidified barium
chloride solution. On adding NaOH(aq) - the solution gives a dirty-green... precipitete. Which turns reddish-brown on heating: Selid X
is most: probably
A. FeSO
FeCl2.
D. FeSU
Which of the follow- ing statements about iron is/are CORRECT?. A. It exhibite
oxidation states of +2 and +3.
B. It occurs,
naturally combined with oxygen only.
C. It can be used as
a catalyst for certain proceese a Many of its
compounds are coloured.
30. The oxidation number"
裝
of X in the species.
̇油泥宝店樓
水內
工造間住了
0330092
2
is
925712 07291569 |
A. Molar ethanoic
D. Molar sugar solution.
32. In the electrolysis
of acidulated water
using platinum
electrodee, the ratio, by masa,
methylene unit
報日僑華
(-CH-), in their
molecular formulac.
B. The boiling point
increasea gradual- ly an the number of carbon atoms increases.
36. When athene is passed
into the nquequs .bromine solution, the
chief product obtaine ed has a structuraT
formula of
几品
11
of
Br
J
C - C - ON
11
hydrogen to oxygen
liberated is
A 1:2
R. 2:1
C. 1:8
D. 1:16
33. Which of the follow- ing factors will
influelice the
selective discharge of on ion at an electrode during electrolysis?"
(1)The nature of the
electrode.
(2)Tho quantity of
electricity
passed.
(3)The temperature of
the electrolyte. (4)The concentration.
of the ions to be discharged.
A. (1) and (3) only, B. (1) and (4) oily end (4) only c. (2)
D. (3) and (4) only 34. When a 5 M solution.
of sodium chloride electrolysed using carbon electrodes. which of the follow- ing results is INCORRECT?
A. The reaction at.
B.
the cathode cai be represented by the 1onic equation; Nate → Na
Chlorine gas is liberated at the anode.
C. The resulting
solution of the electrolysis is alkaline,
D. The substances
liberated at the cathode and anode respectively are in the mol ratio 1:1.
35. Which of the follow- ing statements about
a homologous series
is INCORRECT?--
A. All ita members
have the same anempirical formula. B. All its members.
have a general molecular formula. C. Each member:
differs from the
next by a
B.
Br
ǘ
D.
Br
HICIA,HCHHCAH‘EIC
HICAN HECIH HiCl
-O
Br
OFT
I!
CC
37. Under the diffused
sunlight, methane
reacts with chlorine
to give a mixture of products. Which of
the following substances may be present in the mixture?
(1) CH C1 (2) Ciáci (3) CHC12 (五)Cal
A. (h) only
F. (1), (2) and (4),
only
c. (2), (3) whd (4)
only
D. (1), (2), (3) and
(4)
38. In the experiment as
shown the low, the bulb doce NOT light up when the key Q is.. switched on. Which of the following conclusions is most likely...
Rigad
Hydrogen
Alorida
battery
bulb
A. Hydrogen chloride,
is a
non-electrolyte..
B. Liquid hydrogen..
chloride conalsta of covalent molecules only,
Liquid hydrogen-
ekloride consists
of ions which, are
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I.
Pure Liquida do not conduct electricity.
39. When a mixture
cousisting of one mole of othy ! ethanoqte and one mole of water is allowed to stand for n long time, the substances then present in the mixture are
A. ethyl ethanonte
and water only. B.othaan1 ethanoio.. neld, water and. ethyl ethanvatė
C. ethanol ond
ethanoic acid only D. ethanol, water and
ethyl ethanoate
only
light
40. CHCOC
CH,CLC001+1[C1 The
rencti nu represented
by the chove equation
is known. ÁÐ.
7. substitution
By addition
C. hydrolysis.
esterification 厶Ithicle of the follow
ing statements about carbon dioxide and sulphur dioxide is INCORRECT?
A. Both are soluble
in water to give a weak dibagic acid, B. Both are colour-
leas, odourlees gases.
C. Both give white
precipitate on
passing intó
aqueous bariüm
chloride solution.
› Both cán oxidize a
piece of burning magnesium.
42. W(s)+X (aq) →→ Y(aq)+7
Which of the fallow,
ing factors may affect the rate of the above reaction?' (1) Concentration of
x
(2) State of
subdivision of W
(3) Temperature, A. (1) only.
B. (1) and (2) only· C.(2)- and (3) only D. (1), (2) and (3)
only
45 N2 (g) + 3();
2Nlg(g)+heat In the above reaction, which
conditions wilt
produce the highest
yield of ammonia? A. High pressure and
Iow temperature
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日二廿月四年六八九一公年五十七國民華中
B. High pressure and
high temperaturo C. Low reesurn und.
high temperature D. Normal pressure and temperature
4. When ordinary soop in
added into some hand water, a "scum" is formed, The, "soup" mainly consists of (1)calcium stearate
(octadecaponte) (2) magnesium stearate
(octadecanoate)
(3)calcium carbonate A− (1) only D.(2) only
c. (1) and (2) only D. (1), (2) mud. (3) 45. Which of the follow- ing reagents.ure usually stored in
brown bottles?
(1)ga (2)AND3 (3)AND
(4) cone H2S04
A. (1) and (2) only B. (2) and (3) only
c. (1), (2) and (3)
only
D. (2), (3) and (4)
only,
Anawera:
26. A31. D 36. A 41: B 27 A 32 C 37. D 42. D 28. E 33. B:38. R 43. D 29. B-34. A 39.8 44. C 30% C-35. A 40. A 45: C
經濟(三十)
明德出版社
陳勵德
提供資料 王啓光
Revision
for
Exercise
Cert,Exam(1986)
| ECONOMICS (30)
K.K, WONG & L.T, CHAN
MILL & DALE PRESS LTD,
Questions for Revision
(a)Explain why that a
success in anti.. narcotica, efforts may lead to a rise in price of hersin. (b)Explain why that a
rise in taxi-fare may reduce the total revenue of taxi- drivers
Ana.:
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6.鐵綑
車通姦離婚錝租務新揾人舉,古書銅器花柳清電尢輝「八中酒离獨娃炫司 大批1匹——40匹冷枭平售電 活雳杰佳日季也是一个安普準組: 已經35號37780055
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民商驗外分頸攝秘港失兒旺道金5北道七中
刑業員寓居形密外女都字 糖心 燈調行姸離證錄跟限調活彌
·茶查際居婚拺踪除動心座显業機密對
An increased anti-:
narcotics efforts has
led to a fall f
supply of heroin. As
發包通
泡渠厠
膠水改浴沙
牆紙油漆
shown in Fig.1,
supply ourvo shifta Irom d
representing a fall in
supply. The price of heroin therefore rises, while demand still remains unchanged. The rise in price is, drastie because both the demand and supply of heroin are inelastic. The demand for heroin is inelastie because drug addicts are deep rooted in waing in. Supply of heroin is inolastic, because it.
ia illegal and there- fore difficult to increase ita supply.
Price
义
Quantify
Deoriginal demand
curve
Syeoriginal aupply
curve
S-new supply curve OP-original price
level OPgonew. price level
(b) The demand for
taxi-services is elastic because there are a number of Bubstitutes which aan replace taxi-services. Therefore, a rise in price of taxi. servicea will lead to a reduction in total revenue earned by
taxi drivera because quantity demanded decreases more than the proportionate change in price. Fig.2 shows that as price increases from
to OP, quantity demanded will fall
from 001 to 0Q2, whereby the new total revenue (OqXOPy)
will be less than the original total revenue (041xUP1).
price
00
育教僑華
original quantity
domundod
Og new quantity
demanded
001AP1-original total
1
revenue
00, Pnew total
revenue
2. Describe the
Ang.
functions
of retailers and wholegalore respectively.
The “functions of retailers are
(1)Storing a wide variety
of goods to meet different consumers' needa and therefore providing wider choice for consumers.
(2)Bring goods to where
it is most convenient for the customers at tha:appropriate time, (3)Sorting the goods into
different grades with proper packing. (4)Providing special..
services to customers suchus technical advice, after-sale servi cea; product information services,
etc.
(5)Beuring the risk of
deterioration of goods and ales the risk of anticipating consumer demand.
The functions of whole-solers are
:(1)Acting. S a bridge
between manufacturers and retailers: Whole- salers buy in bulk from producers and gell in'small: quantities.to
| retailers.
(2)Providing warehouse facilities to store goods in large quantities, (3)Providing market.
information to manfacturers so that consumers' needs can be he stwet. (4)lelping finance
production and distribution by allowing credits to retailers and paying promptly: to manufacturers.
(5)Helping develop the
market for the product.
However, with the.. increasing popularity of mail-order business und
super-market of
operation, the role of..
wholesalers and retailers
Quantity
Pg=key, pric台心.
東
葉圖方
has been affected a
little..
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馬星(檳城)七天豪華團 非菲島賞心五天遊 2
$3630逢星期一、四、六出發 $1870逢星期二出發
菲律賓(碧瑤、百島)七天豪華團$2230逢星期四、六出發
K3 08531
经
TEM80 4747397
6680 逢星期一 三出發
9180 逢星期一、三出發
$12280 逢星期一、 出發
$8190逢星期四出發
$11980 逢星期五出發
西歐五國十四天 澳澳洲墨爾砵雪梨八天$7980逢星期五出發 洲 澳洲黃金海岸十天 $9380 逢星期二出發
假
门
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