郭日僑華
calcium carbonate would not. Filter
and recover sodium
翼四第張七第日八初月二十年戌壬歷夏
WAH KIU YAT PO
x+60
24000.
1983
4,2
1200
中學會考試題預習專欄
x=24
(+^)
(vii) As read from the
graph, it is about 18 mins.
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化學
CHEMISTRY (18)
Reginald W. Chụ
Val
MILL & DALE PRESS. LTD.
of
COL
Solution to Q. 25
(11)
XCO+2HC1 X€12+H20+C02
Carbon dioxide is slightly soluble in water. The initial addition of the CaCO, crystal is to saturate the acid in the flask with
thus reducing
greatly the
of con
liberated in the reaction between the metallic,
carbonate and the acid. Thus, the volume of CO recorded would be more accurate. (iii) The reaction is
(iv)
(vi)
is.
fastest at the very beginning of the reaction. This because at this moment, the concentrations of the reactants are the greatest. It is because the reaction is complete and all of the metallic carbonate rencted. As read from the graph, the maximum volume of carbon dioxide collected
3
bex
is 1200 cm Let A (X) he M{XC0z)=(x+60).g
r
mol
According to the
following equation
XCO,+2HCl→ CD+Cl2+H20
1mol:
(x+60)g.
Now,
2 g
Imolz
24 dm at
r.t.p.z
1200cm át r.t.p.
1983
中學會考試題預習專欄
經濟及公共事務ㄊㄤ
明德出版社
ૐ
x+60=84
Add dilute Time sulphuric acid to the mixture. Zinc would dissolve while copper would. not. Filter the resulting mixture and copper would be obtained as the solid residue, on the filter paper.
Zn80 +H 4... Bubble the gas mixture through cold, dilute sodium hydroxide.
Nitrogen(IV) oxide would react with the alkali while oxygen would pass on unaffected and
2N02+2NaOH
Acted
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ECONOMICS AND PURI LC
AFFAIRS (18)
K.K. Wong & L.?. Chan
MILL & DALE PRESS LTD.
Q1. Describe the
the
jurisdiction of Magistracy, the District Court, Supreme Court and the Full Court over civil and criminal cases in
Hong Kong
The system of law courts in Hong Kong structured as: the Magistraecies, the District Courts, the Supreme Court and Full Court. They are described as follows:
A. The Magistracy
the
(1) Civil Jurisdiction
The civil jurisdic- tion of the Magist- racy was transferred to the District Court by the District Court Ordinance 1969. The Magistrates Ordinance. provides a procedure' for the summary recovery of civil debts only,
NaNO+NaNO
Bubble the gas mixture through sodium hydroxide solution Carbon dioxide woull react with the alkali while un trogen, would pass on. unaffected and be collected. 42NaOH
iv) Heat the mixture
gently in a beaker, ammonium chloride would sublime off while sodium bromide would be left behind,
NH, CÍ ( s )~~ NHz(s) + +HC1(g)
Add water to the
mixture. Sodium
carbonate would
dissolve while
(2) Criminal Jurisdiction
In this respect,.
the Magistracy
handles indictable
and summary offences.. Regarding indictable
offences, the Magist-
racy's powers of punishment are
limited to a maximum-
of two years imprison- ment or វា $2000 fine for any one offence and the cumulative sentences of imprison- ment cannot be more than three years. Before deciding whether persons accused of the most serious, offences should be sentenced for trial to te
Supreme Court, the Magistracy also bolds preliminary enquiries into the matter.
B. The
District Court 1) Civil Jurisdiction:
It tries civil disputes, the subject matter of which is under $20,000 or $15,000 in the case of land,, It has original jurisdiction under the Workmen a Compensation Ordinance and the Distress for Rent Ordinance. In addition, it under- takes appeals from the Tenancy Tribunal and Labour Tribunals. It also hears stamp and rating appeals. |(2) Criminal Jurisdiction
carbonate from the filtrate by
evaporating it to dryness.
(vi) Heat gently the liquid mixture. Nitric acid would distil over readily because it is volatile while. concentrated sulphuric acid is non-volatile.
(vii)Pass
ture:
gas mix-
High conc
Ethene would
combine with it to form ethyl hydrogen sulphate while ethane would pass on unaffected. On warning the ethyl hydrogen sulphate, ethene will be liberated and recovered.
CH2CH2+H-HSOL
CH-CH2SOL
(viii)Pass the gas
mixture through powdered palladium; hydrogen gas would be adsorbed while
monoxide carbon would not. On warming the -. palladium powder, hydrogen gas would be recovered.
(ix) Add carbon
(x)
di sulphide to the ixture. Sulphur would dissolve while iron would not. Filter and evaporate the filtrate to dryness. over a water-bath to obtain the sulphur.
Add the mixture to some caustic soda (or caustic potash) Zine(II) oxide, being amphoteric, would dissolve while magnesium oxide would not. On filtering.
agnesium oxide would be left behind as the residue,
Zn0+2NaOH+H20
Na,Zn(OH),(aq)
Solution to 0. 26
(1) Some of the
It tries criminal cases transferred to it by the Magistracy, The maximum period of imprisonment that ang District Court judge can declare is five “years."
The Supreme Court (1) Civil Jurisdiction
The Supreme Court civil jurisdiction is more or less like that of the English High Court. It is enpowered to appoint and control guardians. of infants and their estates. It also exercises jurisdic- tion in lunancy, bankruptcy and company winding-up matters.
(2) Criminal Jurisdiction
As far as criminal Jurisdiction is concerned, the Supreme Court tries indictable offences: with unlimited
Q2,
jurisdiction by a single judge sitting with a jury of
+
seven.
The Full Court. includes two or more. judges of the Supreme Court. It hears appeuls regarding both civil and criminal.
五期星
copper(II)
oxide has
turned from
black to
reddish-brown due to the formation of copper. Anhydrous copper(II) sulphate has turned from white to the presence of water.
CuO+Hg→→ Cu+H2O
Cus0, +50
cuso 5H0
E
(iii) This is to prevent
the moisture in air from entering into the apparatus. (iv)(1)Mass of water.
formed
sgain in mass of
the U-tubes with Cuso
(37.375-32.362) -5.013 g
(2)Mass of oxygen in
the water formed loss in mass of the boat with Cuom
(16,590-12.147). 24443 2
(v) Mass of hydrogen in
the water formed.
日一廿月一年三八九一膳公年二十七國民燁中 育教僑華
mass of water formed -mass of oxygen
contained in water formed
mass of H:mass of #0.057:4.443-
-37.79 17.8:
(5.013-4.443)
=0.057 g
This is to ensure that any water detected must have come from the reaction between copper(II) oxide and hydrogen gas.
}{1}A "saturated"
hydrocarbon is a hydrocarbon a compound composing of only hydrogen. and carbon atoms) in which all the atoms are linked
by singly covalent bonds.
(2)Ethene or
anyalkenes (or corrective treatments are available in (a) Stanley Prison, (b) - Chi, Ma Wan Prison, and (c). Sha Tsui Detention Centre. (a) Stanley Prison
cases from the Supreme(c) Court and the District Court. It is the highest court of appeal within Jong Kong.
Describe what sorta of retributive and
"It is a, kaxitani security prison which keeps prisoners serving long sentences since they: may have a desire to escape because of the lengthy inprisonment. As these prisoners are dangerous to the society, stricter supervision and discipline must be maintained,"
Prisoners receive.
strict security measures there. They are provided with vocational training and are employed within the prison on jobs such as tailor- ing, carpentry, shoe- making, etc. They are paid for their work and part of their wages are compulsori- ly saved. Even though these prisoners have little freedom and few priviledges, they are provided with lebrary, classroom and recreational Sha Tsui Detention Centre
Young people who commit the first offence are sent to Sha Tsui Detention'. Centre for rehabilita- tion since it is unt suitable to mix them
alkynes).
(ii)(1)Ethanol
(CH-CH2OH)
(2)Propanoic acid
(CH CH2COON)
(3) Ethene (CH=CH2)
(iif)(1)They are:
H
C1 CI 2-dichloroethane
H. #
H-C-C -C1 HC1. 1.1-dichloroethane.
(2)They are known
as structural isomers because a they have the same molecular formula but different..
structural. formulae.
Salution to 0. 27
(11)
A is iron powder. B is hydrogen gas. C is iron(II)
sulphate crystal. D is iron(II)
hydroxide.
E ië iron(111).
oxide.
F is iron(III)
sulphate solution. G is iron(IIT) hydroxide.
X is sulphur dioxide. is sulphur trioxide. (1) Fe+H2S
FeSO+H
(2)2FeS0, -7H2O
+148,0
(3)Fe 0,+3H2SO4
+503
en (SQ) + 3H2 0 (4)Fe2(SO4)3+6NaOH
2Fe(OH)3
(5)FeS(), +2NaOH
Fe (011),
(6)4Fe(011)q+02
Carbon moiixide.
or hydrogen)and carbon, all of t. em
adulte criminals in the other prisons.
Life 19 Vigorous in the centre and little or no rivileges are allowed. The daily program involves 10- hours of engagement in physical labour and group counselling or remedial education classes in the evening, Whenever anyone of them shows no respect or is di subedient, he wi he punished. A monthly report of each offender on his behavior is prepared and reviewed by. review board. Give that the progress is considered satisfactory, his release will be recommended.
After the
he is now under supervision
Aftercare
Who:
will find a job for hín. However, he wil be recalled if he fails to perform according to the supervisory order. facilities. Besides they have attend adult educati on courges in the evenings. The Discharged Prisoners Aid Society is responsible for aftoreare and social rehabilitation of
these offenders.
(b)
(ii)
(v)
can reduce
iron(III) oxide to
iron.
+3002
6 Fe+
3003
The gas liberated at the cathode is hydrogen and that at the anode is
oxygen.
A the cathode
+2e
Ho
At the anode: 40H → 2H2O+02
it is seen from the equations in (11), the same amount of electricity would liberate, in moles, twice as much hydrogen gas as that of oxygen gas. Thus, Becording to Avogadro's law, hydrogen gas liberated would have a volume...
twice as large as. that of oxygen gas
(2)This is because
hoth hydrogen and oxygen gases are slightly soluble" in wate: but they
dissolve in
water to
different
ап
extents, 80, exact 2:1 (H÷02)
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.
Its concentration- would be increased us the water is continually. decomposed during
the electrolysis.
(b) Chi Ma Wan Prigön
Offenders who
receive short sentences are sent to: Chi Ma Won Prison. It is an open prison with minimum security beasures. Because of
short sentenced and a good environment there, prisoners will be less likely to escape?
Prisoners at Chi Vaù Prison are
provided ai th vocational training, recreatiónal.
activities and adul£ education in the evenings. They AA MPAK
such as tailoring, carpentry, etc. in addition to outdoor work such us
afforestation, road- Building or repairing. etc. ll their work are paid. Visits by the prisoners. fanilies are
encouraged and various group discussions are being held occasionally,
When the imprisonment
tern is over, after- care and rehabilita- tion are available through the Discharged Prisoner Aid So.
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