日二十月六年已己圖置
【1989中學會考試題建議答案
明德出版社
MILL & DALE PRESS
SUGGESTED ANSWER TO GEOGRAPHY, PAPER
(a)a volcano,
(b)-concave slopes
-broad base.
-lower in height
-crater at the top
(c)-some plates diverge, slide past one
"another
-some plates collide against each
other producing the mountain. -at the destructive margins.
-the continental plate (less densel
collides. against
-the oceanic plate(denser)
-oceanic plate. is. subducted,
destroyed in the mantle -beneath the continent.
-ocean trench is formed.
fal thyolite is resistant to erosion
ite has hexagonal columnar
joints, fine-grained texture.
coastal area
-destructive wave
vertical columns form
steep cliff
retreat
-wave-cut platform may be formed.
-vertical joints are enlarged
-to form sea caves
further erosion:
-blow holes, geos
(a)Data set A
(b)Data set C
(c)Data set A
station
Data set. B Data set C
station 3 station 1.
(d)-station 2 is located at 25°N.
-high pressure system.
-far away from the ocean/interior
parts of Africa
-No or little maritime effect
great: annual temperature
-little cloud, cover
temperature
range
.greater
daily
range
of
-tropical area
日僑茶
-success in family planning.
programme
reakdown of large-family,
igh Tiving standard encourages small family size
increase in education standard of parents. -industrialization
urbanization.
(11)-is decreasing
and
from 10 per thousand to 5 per thousand
remains unchanged after 1965 -no war
-improved medicine:
-improved medical service
-Tower infant mortality rate- -better sanitation and hygiene -longer life expectancy.
(b)29.75 per cabusand
(c)(i)immigration
(ii)-ready supply of cheap labour-
-encouraging the development of labour-intensive industries e-g. textile, clothing, electronics.
social -heavy burden on
Community services -higher sex ratic -increase in total population
6.
期星:日四廿月七(九八九一)年八十七國足藝中!
-supply of water for cooling and
waste disposal
-presence of market e.g. motor
vehicles in Shanghai easy and cheap export
(11)-situated on a delta, high cost and difficulty in construction of heavy industry -inadequate supply of local and
nearby iron ore and coal -lack of high-grade ore for the modern steel-making technology -long distance to obtain raw materials and power resources"
.*.high transport costs -inefficient transport
(a)(i)fishpond farming
(ii)vegetable farming.
(b)scattered settlement
(c)-presence of extensive lowland
(c)(i) the earth nuclear
resources have not been fully exploited
-Tow operational costs
large amount of energy generated cost and
(11)-high capital
8.
(a)
maintenance costs -high technology is required -radioactive leakage from and damage to nuclear plants may cause large-scale environmental hazards.
si 20
purpose
Pack A
swalter
for relaxation and exercise
-fever
variety of recreational, activity
-efficient transport connecting it
and Urban areas.
-fertile alluvial soil
-Some for
Park B
Larger
conservation of Inaturát sceηe and wildlife-
-greater
-outdoor-
activities whlen cannot be carried out in
the urban aress 6.g.-kite
Hying, camping.
-tor differant childreen, old types of users
-contour lines
-presence of water supply-
-for fish pond
and
-for irrigation.
-Shan Pui River
-Castle Peak Road
-suitable tide
people
-coastal area favaourable for oyster
beds.
-far
Away from urbani areas, extremely wet land, discouraging urban encroachment
"passive
recreational activity
-mainly active.
-coastal area.
(b)
Fork A
Park B
in the rural area
市民也可前往大志抵銷。 二十五日,在此同期,並可享有特價量持。 müük
| 六天的公開庭實至七月 港九各門市參觀選構
高五
CATE ME THE PAS NEOS M
ECEM
出来
馬麗
HOLI NEKEK · 18TKER BREEZE
立足足停賽克李半,低久,本末通後一仗與「力」「發帶動」
- LELAKI HRNED-917*1#KRZIERII-
REFER T
-pockets of magma
which are less dense -giving rise to
volcanic island arcs.
form chains of
-frequent volcanic eruptions
-lava accumulates to form volcanoes.
(d)-earthquake
-high temperature in summer -noderate temperature in winter.
-tsunamis
-landslide
-lava flow
-volcanic eruption
-toxic gas
(a)Photo 2a granite
photo 26 rhyolite
(b)-granite is well-jointed,
has coarse-grained texture
such as feldspar and a small amount of biotite are easily decomposed, -is easily weathered by chemical
weathering.
-constitutent minerals S
-in Hong Kong which has a hot and
humid climate
-weathered granite becomes
soil
-tors
-gullies, badlands
-lower in height.
只中學會考試題建議答案一
【明德出版社:
MILL & DALE PRESS
SUGGESTED SOLUTION TO CHEMISTRY,
PAPER 1
((a)(i)Y is water.
CUSD + 54,0→→Cu50·5,0
white
z is carbon dioxide.
CO
blue
Ca(OH)→→→ CaCO ( s) +H20
Himewater white
solid
(e)
station i
station. 3
total amount in smaller 380 m greater 1544 mm
a 'year
humid vinter
seasonality
-dry summer
huald witner -rain malily
fails in
wluter |-greater
seasonality
"wet summer:
rain mainly
(a) is
NG
(ii)mole ratio of Na C 0
43.40 11.32 100-43.40
100-43.40-11.32
1189 0.94 2.83 21.3
Xhas an empirical formula of Na,CO, Thus, it is sodium carbonate.
(111)(1)W might be sodium hydrogen-
carbonate NaHCO,) (2)2NaHCO Na, CO +H2O+CO2 (3)No, it is not a redox reaction because the carbon atoms in NaHCO Na CO, and CO, have the same o.. of +4.
(4) is the main ingredient of baking powder or fruit salt e.g. "ENO
(iv)Use a sand bath or move the
Bunsen flame around the boiling tuber
(b)(1)(1)D is an alcohol because it is
soluble in water and gives CO2 and H,0 on burning." (2)8 is an hydrocarbon because it
is insoluble in water and
gives £0, and H.0 on burning.
tric could be a carboxylic acid. Add
C to some aqueous sodium- hydrogencarbonate. If CO, is evolved, it is a carboxylic acid. NaHCO + H(aq). 9N8 (aq)+,DỊCH Alternatively
Dissolve C in some water in a test-tube. Add a piece of Ho ribbon if gas bubbles are seen, then C is a carboxylic acid.
Mg + 20 →→→→Mg + H2 {g}
(c)Elements
Electronic configuration
2.8
52.0.40
$2.8.7
$2.8.8.1
(1)(1)R and S would form an ionic
compound. [S] [R]
(2)q and R would form a covalent
compound. On
OO
1alls In
summar -Uttle
er thousand to 13. per
-greer fluctuation of birth
rate between 1952 and 1963 -post-war births
-increase in young adults from:
migration
-greater rate of decrease between 1963 and 1968. (10 per thousand) -slow rate of decrease after 1968
ORA
.0
more volatile because
Ce between its moleculeses the weak.
moleculang attraction or van der wagls:
(a)-has shifted towards inland and
-the west, northwest and southwest -more balanced distribution. -to achieve a good regional balance of economic development or regional self-sufficiency
-to fully utilize local resources.
e.g. Sichuan Pendi
raw materials e.g. iron oras i Anshan, Urumqi, Lanzhou
-power resources e.g. coalfields in
Taiyuan, Fushum, Urumqi.. -labour supply.
-to miminize the transport cost of and. finished materials
raw
products.
-to redistibute the population --gover me policy
encouragement.
(b)(i)-sudly of raw mater
by cheap Water traging -e.g. iron ore from
Maanshan
-power supplies.
-e.g. cual from Huainan.
and
H.E.P. from Chang Jiang lowlying relief with extensive Toyland
-presence of port facilities. -ready supply of skilled labour
from Shanghai
-efficient transport system. -10 km away from Shanghai,
(2)By fractional distillation, a
more concentrated ethanol solution could be obtained from the mixture. (3)Heat the solution, obtained in (2) with a small amount of acidified potassium dichromate solution. If the solution turns from orange to green. Then, the solution contains ethanol.. (iv)(1)In such agricultural
countries, ethanol can be made economically by the above process as the raw material (glucose) is readily available. A
(2)It would cause less pollution
because ethanol can be completely burnt to give water and carbon dioxide only,
BURL
(a)(1)A standard solution is a solution with known concentration. E (1)The indicator turns pink when
the solution is acidic but yellow when the acid added is reacted with CaCD, on swirling. (2)The effervescence is due to
the evolution of carbon dioxide.g?
CaCO3(s) + 2H (30) ———.
(iii)The permanent pink colour is
observed when there is present a slight excess of acid. (iv)CaC0, + 2HC1→→ CaC12+ #20 + CO2
*1 mol 2 mol
n(CaCO;) in one, tablet
xn(HCI) reacted
15.2 1000 * 1.00)
7.6 x 10-3
10-3 mat M(CaCO) = 100 y mol"
m(CaCO) in one tablet ÷ 7-6 x 10-3
x. 100
= 0.76 g
A by mass of Caco, in one
antacid tablet
0.76
x 100 1:20 = 63.3%
(v)This is to increase the surface
area of contact so as increase: the rate of reaction.. (vi)There will be no gas evolved if magnesium hydroxide is used and this would make the stomach more comfortable,
(b)(1)The liquid level inside the glass
tube will rise.
This is because the CO, produced
will build up a pressure inside the flask, thus pushing the. Liquid level up inside the glass. tube (11){1}C_H120 →→2C2H ̧04 + 200,
(2)The process is known as
fermentation or anaerobic respiration...
Yeast provides the enzymes (organic catalysts) for the reaction.
(iii)(1)When the alcohol content is
increased to a certain level. the function of the yeast is inhibited or the yeast is killed.
(a)(itsuse e prodat.
firings rect readily with water. (ii)This is to prevent the product (a
sublimate) from entering into the gas-syringe.
(iii)This is to increase the rate of
reaction because iron filings have a larger area of contact with the chlorine gas. (iv)The initial heating of fron
filings is to start the reaction. However, once the reaction is started, no more heating is needed because the reaction: ts itself exothermic and the heat evolved is sufficient to maintain the fron filings at a high temperature.
(v)The product is iron(III) chloride.
2Fe +301 2FeC1.3.
(vi)Ar(Fe)
55.0
M(FeCl 2 Fe
162.5 g mol
-1
3 CT2 FeC1,
3 mol 2 mol
1.e.(2x56,01g (3x24,0)dm (2x162.5)g
dma
y 9 0.150, (2x162.5):56,0
*10:150 g (1)y
X
2 x 162.5
2 x 56.0
= 0.435 g.
(2)x: (3 x 24.0)
.0.150
x.0.150
0.150:56.0
2 x 56.0*(3 x 24,0)
= 0.0964 dm3 (or 96,4 cm3)
vol. of C1, remaining
420-96.4.
= 23.6 cm3
(b)(1)The gas evolved is hydrogen gas. 2Y(s) + 2H,00€)→2YOH(aq)+H2(g) (8.B. Y has an o.. of +1, as
indicated in the formula of its oxide)
(ii) is more reactive than Fe as X can displace iron from iron(II) sulphate solution.
Z is less reactive than Fe because Z does not displace Fe from FeSO, solution.
Z is the least reactive among the four metals because its oxide is decomposed to the metal on heating.] Y is the most reactive because it
can displace from water. Thus, the order of reactivity is: Y>> Fe> Z.
(d)-subject to serious flooding in
times of typhoon -lowlying relief.
-long period of cultiration, soil
becomes infertile.
-increasing encroachment cig. Yuen Long Industrial Estate, Tin Shui Wai ---lack of young labour
a)-is increasing
-from 1.3 oil equivalent to 6.7 oil
equivalent
-gr
stocat
of increase in 1965-
expensive since the
11. War Yecession
tion in energy consumption
-development aidse
energy
re
-development.
energy
saving technoty
alternate nuclear
energy-
-coal-based thermal power plants.
(iii)(1)Metal X. Because X is 'more'
does
reactive than Fe, thus having a stronger tendency to lose electrons than Fe. not react with wate (2)t is because Na, 1993
strong electrolyte (3)The oxidation ration is:
+2+ X(s) →→→→ X* (age 20 (4)Coating iron
metal X would prevent it from rusting. Even when he is broken,. the metal X would corrode first because I is more reactive than iron.
|{a}{+Sughris
non-electrolyte, so, solution does not conduct ctricity. Na,SD solution and
CUSO, solution both consists of mobile ions, so, they conduct electricity.
(11)In experiment II:
(1)Oxygen gas at electrode Q. (2)Hydrogen gas at electrode R. At Q: 40H2H 0 + 02 + 4e ̃
At Ri 2H*
As it is seen from the equations above, equal amounts of electricity will liberate twice number of soles (or volumes) of Hy as that of 2, so, the gases are liberated at different rates. (iii)in experiment, III:
(1)At electrode Q:
· 40нTM (aq) →2H20{{) + 0°(g)
At electrode R:
·Cu2+(aq) + 2e→→ Cu(s)
(2)Add the solid metal into some concentrated nitric acid in a test-tube. If a blue or bluish-green solution is obtained. Then, the metal is copper. (3)M(Cu) = 63.5 g mot
| (b){i}NCH2
(aq)
+ 2e→→→→ Cu(s)
2 mol 1 mol
2 F
? F
63.5 g
0.22
9
quantity of "lectricity
2 x 63 x F
0.22
3.22
2 x
63.5
=668.66 C
x 96500 C
time required=
f
668.66
1337.3 s .22 min. 17.38
= CHC) → +40—C
པར ག་ པའི་ ཅད་
(1)mass of a repeating unit
+CH2 — CHCT 62.5 g
no. of repeating unit =40000 62.5
640
(111)(1)Extrusion moulding.
(2)Heating the pipe until it
softens,
It is because PVC is a thermoplasticn:
to the urban area
In the rectalmed iowland.
- near the people's
places of work or hade
- convenient for people,
within the walking distance
high land value
(c)-accessibility
-land value -population density
END
In the hilly area
aros
-near the reservoirs
far away from people,. free from pollution, disturbance
low land vatue
(iv)(1)Hydrogen chloride, carbon
monoxide, soot or chlorine, (2)Blast in more air so as to
burn the PVC bags completely. thus reducing the amount of Co and soot. Absorb HC) [or C)) by passing the wasted gases. through water (scrubber system).
(a)(i)Solid reactants: ammonium
chloride and calcium hydroxide, Drying agent: calcium oxide.. (51)
NH C! + Ca(Ch),
calcius cxide
N.B. Marks will be deducted if
you use more apparatus -than provided, even the delivery tubes.
(iii)2NH, CT÷Ca(OH);→→→CaC}; (2NH2+2H2O
(iv)(1)Addition of solid Nach
1 of
increases the concentration of
OH ions and this would shift the equilibrium to the left, thus liberating more NH.. (2)Addition of Pb(NO,), gives
aqueous Pb2+ ions which will precipitate the OH ions, thus lowering, the concentration of OH and hence the pH value. Pb2+(aq) + 20H(aq) →→.
Pb(OH),(s)
(b)(i)(1)Thermal cracking of kerosene takes place in Experiment 14 (2)Dehydration of ethanol takes
place in Experiment II.
(ii)(1)The oily liquid might be the unreacted kerosene or hydrocarbon products. of cracking.
(2)Kerosene is insoluble in water
while othanol is soluble.
(111) Remove the heat source before the
delivery tube is disconnected. (iv)They are unsaturated hydrocarbons.
(v)By cracking large alkanes are
broken down into more useful products (smaller alkanes and alkenes). The products can be used as fuels and in making polymers,
(c)(i)I.Heat some sulphur powder in an
evaporating dish until it melts.
II Allow the molten sulphur to
cool down.
III Pierce the crust.
IV.Pour off the remaining molten
sulphur,
V.Sulphur crystals would be
observed.
(11)(1)A is plastic sulphur. Bis sulphur dioxide. (2)550, + 2Mn0,
424,0
2Mm
END
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