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WAH KIU YAT PO
報日僑華
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日九十月二年九七九一曆公年八十六國民華中
有教僑華
BRANE
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1979
中學會考試題預習專欄
中國歷史 (十九)
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(5)五四運動 月
2007 [HCR AUKERAONZ.
71 PAGEWASA Tran
• WEERAŠN
行新海軍雜誌; 浪發表文中改底芻議。提倡白話
對。陳圈
(H) 近因。
山東瘓交問題:
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1979
中學會考試題預習專欄
|經濟及公共事務(十九)
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Economics & Public Affairs 15.
Population
IIL Effects of rapid growth
of population on the society Society of Hong Kong
Hong Kong's rapid growth of population since the Second World War has resulted in the following social problems:- a. Land and housing: Dense
population in urban areas has made rent creeping and the supply of houses. insufficient. Therefore overcrowdedness,
unhealthy squatters and
tenancy disputes arise.
Health and enviroment: Due to overconcentration
1979
中學會考試題預習專欄
化學(十九)
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Chemistry (19)
Question 28
The following results were
obtained of an organic compound Z:-
(D) 0.37g of Z,
on complete
combustion, gave 448cm3 of carbon dioxideat s. t. p. and 0.45g of water vapour.
(II) 185g of Z, when
vapourized, had a volume of 560cm3 at s.f.p...
(II) Compound Z reacted with sodium to produce a colourless gas X which gave
a "pop" sound on applying a flame.
(IV) Compound Z could turn
acidified potassium
dichromate from orange to green on prolonged heating
of the mixture.
(a) Using the results in (I), try
to calculate the empirical formula for compound Z.
(b) Using the results in (II); try
to calculate the relative
molecular mass of compound
Z.
(c) Hence, or otherwise,
determine the molecular
formula for compound Z.
(d) Using the results in (III) and (IV), give the name of the homologous series to which compound Z belongs,
(e) Give the IUPAC names and
成人锁政政府不同,政尤
(1) TESE*#*#*#*·
AA÷SEZENTUEL 上一期限於5月2日报
河北大、高等、法政等校三 GEAZA: FF 全康生作有秩字之示威实行, 地理和會代表,必頭堅持利底; 芋大校協進要業高等工 二二段
(2)6月4日 十三菱修生三千人 ETATEM AREALIKE 主波农門集會示威抗倒,由华大
(3).田要求段政府很曹汝保、京宗
2游行學生沿途高呼「打倒餐國賊 可口號,李敏家樓搞索古老,雖
學生多人當場被捕,是爲「五四 SOUT
of population in urban areas, space for public amenities and medical facilities have long been
felt insufficient. More-
over industrial growth
has made many residential and
industrial buildings. mixed together. All
these result in pollution. and traffic congestion. Social welfare: As ar result of increasing population, the need for social welfare services. arises. Social problems such as crime, drug addiction, family problems, and juvenile delinquency are thus created.
Reasons for the population
control in Hong Kong
Population control is significantly important in Hong Kong for the following
reasons:
a. On the negative side of
population growth, it
you have mentioned in (d).
(f) Write an equation for the
complete combustion of compound Z...
(g) What is the minimum volume
of oxygen at s.t.p. required
for the complete combustion of 7.4g of compound Z.
Question 29..
(a) A set of 10 test-tubes of
uniform bore, each containing 2cm3 of 0.5M solution of a metallic chloride, had varying quantities of 1 OM silver nitrate solution added to them separately. A white precipitate was formed in each test-tube and after centrifuge, the height of the precipitate was measured. The results were plotted on a graph paper as shown below.
of precipitate
elative height
2
3
Volume of 1.0M AgNO3 in cm3
(1)
Give an ionic equation for the formation of the precipitate.
(ii) What does the flat portion
of the graph indicate to you?
C)「醒」形岛未决。
(2) 新年包括文中
(3) WEAR NTARVIKE • T
·CA TRAILERS RETA
(三十八)試從政治、文化、社會三方面去分析。五街
對」的背景。並挑外交、經、小術思想三
面去分析「五四北上的影 串)五四漫的背衰。 (1) 191
2由間』與『二十一鲣欸]
can be an impediment to economic progress. It poses a heavy burden on the community in the sense that the provision of adequate employment for a growing labour force can be difficuit, and that resources for economic development. may be diverted to meet the immediate demands of an increasing number. of people for basic goods and services, such as foodstuffs, housing, education, medical care, transportation, etc.
population
Brows rapidly, per capital income may be reduced This means that the income earned by each individual falls since st the Gross National
Product will be shared by a greater population size.
b. As
Unlike most Asian countries, Hong Kong is characterized by an silver nitrate just enough to precipitate all the chloride ions in 2cm3 of metallic chloride solution? Hence, calculate the amount of chloride ions in 2cm3 ot metallic chloride solution.
(v) How many moles of chloride
ions are there in one mole of metallic chloride? (vi) What is the most probable
lonic charge on an ion of the metal? (vii)Using M-aa the symbol for
the metal, write down the formula for its sulphate. (b) Describe briefly a chemical
test which would distinguish between the two substances in each of the following pairs. The results of the test on both substances of each pair should be clearly indicated. (1). Two aqueous solutions,
one of which contains Todide fons and the other chloride ions.
(ii) Two solids, one of which
is sodium sulphate and the other ammonium sulphate.
(ii) Two black solids, one
of which is copper(II)oxide and the other iron(II)sulphide. (iv) Two gases, one of which is propene and the other
propane.
(v) Two liquids, one of which is methanoic acid and the other is ethanoic acid,
Question 30
structures for all the possible (ii) How many moles of metallic (a) A series of reactions on ari
isomers with the molecular formula of Z, belonging to the homologous series you
chloride in 2cm3
solution?
of
(iv) What is the volume of 1, M
reddish-brown solid A is summarized in the following block diagram.
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extreme shortage of natural resources. Population control is necessary to reduce the growth rate of demand for foodstuffs and
other necessities.
In the past few ye Hong Kong has experienced a rapid process of industrilization and becomes an export- oriented place. But inevitably Hong Kong has lost her comparative advantage in labour- intensive products because of rising wages at home. The only beneficial way to maintain her exports! competitiveness in
overseas markets is to improve the labour skills and industrial
technology. To achieve this, a good human capital must be. improved. Thus it is
black powder
F
strong heating
Conc. H2S04
heat
green
Cipitate
white powde
TE
B
strong heating
aqueous NaHCO3
water
bluish- green precipitate.
aqueous blue NaOH
solution
ID
A colourless, pungent as G is evolved when solid A is heated with cone, H2S04. The gas G turns acid.fied potassium dichromate green from orange.
Solution C also gives Don adding aqueous ammonia solution to it, but,
D re-dissolves to form a deep-blue solution when an excess of ammonia solution is added.
(i)
Identify and name the substances, A, B, C, D, E and F properly. (ii) What is gas G? (iii) Write an equation for
each of the following conversions:-
(1) A B
(2) C-D
(3) D-F
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EXEN-
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薇科科密供之戰,哲學
一政府努力提倡,1938年成線中 央研究院21919年假設化:64
俄新文化漫曲:文化表雖之擋
Aimed to
the
necessary to have adequate training.
programmes for the young genreation, while at the same time population control is essential
In recent years, Hong Kong has experienced serious inflation which adds difficulty to her export sector: To curb Inflati on, one of the effective way is to control the rate of Increase of demand for foodstuffs and . necessities by keeping down the growth rate of Population. Population control in
Hong Kong can ease the burden on
providing Social, and
administrative services to the community, thus
releasing public funds
for the improvement of the economy and assistance to industry.
(4) C→E (5) E-F
(iv) Name two gaseous
reagents which can convert. F to A under suitable conditions.
(v) Give an equation for the
conversion of F to A, using either of the.
reagents you have suggested in (d).
(vi) Write an equation for the
reaction between D and excess aqueous ammonia solution
(b) W, X, Y and Z are elements, in the same period, but in the groups IV, V, VI and VI respectively, of the Periodies Table. All of them can form simple, covalent. stable hydrides with hydrogen under suitable conditions.
(1) Write the formulae of the
hydrides of the elements W, X, Y and Z
respectively.
(ii) How many bonded
pair(s) and lone pair(s) of electrous around the elements W, X, Y and Z separately in the
hydrides concerned? (iii) Using the electron pairs
repulsion theory", draw diagrams to show the most probable 3-dimensional
arrangements of the atoms in each of the hydrides.
(iv) Mention the shape of the
molecules of each of the. hydrides.
(v) Arrange the hydrides of
W, X and Y in the
ascending order of the angle formed by the
bonds between hydrogen atoms and the central atom.