1983-02-05 — Page 24

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

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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

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(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