直四第六第日三廿月二十年戌壬脑复
1983
中學會考試題預習專欄
經濟及公共事務
|明德出版社啓光
·陳勵德R
提供資料
ECONOMIC AND PUBLIC
ATHAPES (20)
FIK. Wong &
MILL & DALE PURS
Sone. Government
Chan
Departments dealing with major communɔ ty
services
1. Housing Departrient
advised by:
Housing
nities:
"It acts as an.
executive are
the Housing Authority im 1. hai Tiri tg and
managing public. housing estates; dealing with temporary housing, squatter control and clearance; and.
5. advising the
overnment on housing policy. Department Read:.
Director of Ponstug Organisation.
1.1ine Branches;
a. Construction
Ustazé
Management
Operations.
Staff Divisions
1983
中學會考試題預習專欄
化學 (+)
WAH KIU YAT PO
Housing
Authority
Secretarist.
Administrative
Division
Education Deportment
Advised by:
The Board of Education
Responsibilities:
It takes care of.
kindergartens
primary dyózkion
post-secondary university
education, adult education,
technical education, aidal 1 matters
relating to education in Hong Kong.
Departneut flead: Director of
Education: Organisation.
It comprises of School Divisions, Special Education section, Adult Education Section. advisory Inspretor- ate, Music Section; Physical Education Section, said Overseas Students and Scholarships Section.
Social Welfare Department
iduikel. Be.
The Social Welfare, Advisory C6901XTee Responsibilities
General
Implementing
Mass of Mg(MM),
formed
=(3x58)x2+14
-3.48
明德出版社朱宏林 提供資料
(2) Vor
NIL
CHEMISTRY (20)
100
Reginald W. Chu
MILL & DALE PRESS ITD.
Solution to Q.31
Gas. X is nitrogen.
(1) Y is copper
and 4 is magne s.i um hitride.
(2) NIL2+3Cuo
N12+5¢u+JI{{}]
i) The concentrated
sulphuric acid is used to dry the gas X and to react with any unreacted armonia gas.. (1), P is magnesium
oxide
(iv)
gis ammonia gas.
(2) MezNo1+6ll¿0
---> 3M @ ( 0!! ) y + 2 NHz M(Ng)=24 g mol M(M£3N,)=100g mol¬
According to the equation below M+N MEN2
imol
(3x24)g 100g
1.34 g.
Mass of ME,No obtained.
-100%1-2
=58 g mol.
(vi)M(Mg(OH)q)={
According to the equation, he lov
+0!! ̧ ̧ O→→>3Mg ( 01} }+2\!!{=
1 rol
100
14
3 mol
(0x58)
2 mo
de
=0,890 da
(vii) Air consists of
nitrogen. When
agnesium burns in air, it forms, in addition to the
agnesium oxide,
(b)
also the maguesium' reacting with water, given off the
alkaline gas antonia.
(1)Copper(TI) oxide would
remain unchanged when. heated in a current of air. When carbon powder is heated in
air, it
would combine. with the oxygen in air to give carbon
dfoxide. This gas can be identified with Bome limewater as it could turn the limewater milky
+H20
(2)Carbon would not have any apparent reaction with hot dilutes hydrochloric neïd. When copper(II) oxide is heated with dilute
neid,
copper(II) culorrie would be obtained.
Solution to 0. 32.
(1) X (2) Z (3) T
The formula is XzY.
(iii) (1) Jonic
(electrovalent) bond is present
in and the
報日僑華
government
policies on Sucia-I securi ta-wid
welfare. programÉ S Specifič
1.Developilent of social respon- kilidity Jánd Community bai Idings „Provision of
wide range of services designed te, fndividual tamilies" and their
3. Prov: ombrers;:
of
services for the disabled;
4.Operation of
probation
service,
correctional institutious for young
offenders aid services for court, and .administering
the public assistance and other sorial
security sehemes. Department Head:
irector of Social Velfare organisation: It has five divisibus, 1.Group and Cormunity. Divies on
rk
Family Services Divisioir
5.Itehabilition
Division: Probation/änd Corrections
covalent bond in qu
(2) The electronic
structure
is:
The electronic
structure
is:
Q
Love: melting point.
P. consist of
us strongly
together by the electrostātie force wui le Q consists of molecules held. together by the weak van der Waals force only. So to melt P requires much more energythian to melt Q.
(4) P would conduct electricity because it consists of ions whicb. become nobile
in liquza: state, whereas
consists of convalent molecules which
do not conduct electricity
even in liquid state.
The atoms in X are held together by fairly strong. metallic bend while
Y consists of molecules held together by weak
六期星
Social Security. Division
Medical and Health
Department'
advised
by:
The Medical de
ment advisory Committee Desponsibilities
top-
1.Provision ef
medical and bealth
services through Hospitals Pod clinics, and
Maintaining
facilities.
covering headto,
Industrial
heith audiue cantro) of cornuni cable diseases.
Department Vead;.
Director of nd Health. Organisation;
1. Regional Hospitals
and Clinies
S. Pari by Wol the
Service
„School Medical
Service.
4.Mental Peal thi
Service
3.Tudustrial Wealth
Service
6.Dental Service 7.Port Health
Service
uestion for Revisi
What should the (a))
日五月二年三八九一公年二十七國民華中 育教僑華
Government, (u): school
(e) family, and (d)
citizen do to prevent
crime u Hong KonLOY Answer:
(a) The Government
71) In education, roverment "should provide equal opportunity for yning people to reccive education, intensity moral and sociuladnention in schools, and balance the evelopment ar curriculum and seRITAS curricular activities în schools AS (i) públic Jouster, the goversi-
net should-vitä Cadequate space to
avaid overcrowdedness which is the source:
of tension, viele,
behavioër
and „innorid (ii) în maintaining Lavand orden, the Edverument should** minimize loophole's Jég) abiti on tonusuke justice of lan strengthen the police force to control garbling, marceties: and tried wetivities and enforce the work of ciclo dover.
corruptionstion.
mblía
in private sectors. Moreove) beavier pubishment desirable.
(io) In: govial wet fard, tad nimem ment sumtd improve
the assistance schean for the aged and
Solution 40 (.55
van der Waals force. So, more energy is required to melt which thus has a higher melting point.
(i
Elements in the same group of the Périodic Table have the same number of. electrons in the outermost (or
siell of
atoms. As the
VVY
Ioperties
of an element are mainly determined by an electrons in the outermost shell, so,"
the
elements in the. same group often lave similar.
chemical behaviour.
(ii) Ammonia combine
with hydrogen
chloride to form an ionic" compound, armonium chloride. This substance is thus soluble in g water but insoluble
in covalent
(iv)
solvents such as
methylbenzene,
Pure water las a pl of 7. When hydrogen chloride dissolves in water
hydronium ions (1.0") which is responsible for the
BUILT As a consequence, the. pl decreases from. 7. to, a smaller. value, sindicating an increase in acidity.
Ethane is a saturated hydrocarbon;
in etline all the: C-C and C-II bond's are single covalent
in bonds. However, etheng, there is a
carbon-carbon double bond. (C=C), So,
elitane and ethene show different chemical behaviour.
(ic)
The white powder is anhydrous, copper(1J), sulphate: Gas X is sulphur dioxide..
Cu+150%
4
The of the solution would be smaller than
7 because. SO2
is an acidic oxide (1)It would turn
from orange to green.
(2)Drown fume a
would be seen
(3)White
precipitate of barium sulphite would be formed. Bac
lg+H,04S0g Pa50_(9)+20C1
(4)It is
doceloúrizedz Br+2110+50
When 50, dissolves in water, it
ionizes give tile
hydronium iong: (130*) and the
sulphite ions,
(802)
When
Na¿SO, dissolves in water, it dissociates to form Na ions. Since both
*
tions contain
19,90
they show similar reactions towards certain reagents. The solution. is blue in colour. because it contains hydrated copper(I ions.
[M(Na (!!!)=40 g mol-
molarity of
solution A
0 1000
250
inetiptoyed, jaovide more recreational services, and sợi tip-
poze corrective
institutious.
(y) în communication, The governnent should set stricter consor- ship inverarhiel önntents of mass nedia "suele as rádiós, televisions mul newspupers.. School
students discipline rive proper counsel ing to job tom) students EUNE LE relazibusby, sezoa pind paren art inprove Schiebeulni dis badante
Vith extras ericnler uddivities. Many ty
Parent's should rive proper care, motiva tion and gas dla ei to their dildren, understand their needs and pruh beras, emphasize moral training, and track then tare proper wiy of spending leisure tind
citizen
To prevent serine, citizen should co- operate with the poiten by reporting erines immediately, neting as a witness when required, and Learing a sense of civic responsibility and self-discipline. (11) M{U, SP, )=98 z mol
(*)
molarity of solution 1.
98
pl of thes golution would increase to 72 (2)}{{1,,50, ) reacted
A
1000*9.1
=0.0025 mp}
(Nadi) reacted
05
* 1000*
mul
nole hatio.
-0.005: 0.0025.
2:1
Tonce, The salt Xobtained.
slimud be the normal salt. called sodium sulphate,
(3) According to the
equation below
=1{12504)
mol
Mob. 07
solution
svol, of (Na OTT
50 on
the molarity 561otion
OE)
20
C000
10.
1000
mole ratio,
#1:1
Hence, the salt obtaingil voulab be theseid salt
cal Fod' iliun hydrogen sulphate