FERENCE LIBRARY

27 JAN 1979

育教僑華買三第張八第日九廿月二十年午戊夏 WAHAY YAT PO

1979

ion.

f.

中學會考試題預習專欄

經濟

(十六)

明德出版社孔覊璇盧榮俊古嘉利提供資料

Economics (16)

Population

111. Effects of rapid grow

of population the

society of Hong Kong

Hong Kong's rapid growth of population since the Second World War has resulted in the folleving social pre-

bles:-

a. Land and housing: Dense.

donation in urban area has

made rent creeping and the supply of houses insufficient. Therefore overcrowdedness, unhealthy squatters and nancy disputes arise, b. Health and envirement: Due to overconcentration population in urban areas, space for public amenities. and medical facilities have leng been felt insufficient Morcover, industrial growth has made many residential Industrial buildings mixed together. All these result in pollution and traffic con gestion.

As

and

Social welfare: sult of increasing population the need for social welfare

services arises, Social pr blems such as crime, drug addiction, family problems, and juvenile delinquency

thus created.

IV

Reasons for the populat-

ion centrel in Hong Kong

Population centrel

is significantly important in Heng Keng for the follow ing reasons:

On the negative side of

population growth, it can be an impediment te economic

It poses a heavy

progress.-

burden on the community in the

sense that

provision ei

adequate pap

syment for

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growing labour force can be difficult, and that resources

for economic development may be diverted to meet the, in- mediate demands of an increas- ing number of people for basic goods and services, such as foodstuffs, housing, educat ion, medical care, trans- portation, etc,

b. As population grows re- pidly, per capita income. my be reduced; This means that. the income earned by each dividual falls since the Gress National Product will be shared by a greater papu-

lation size.

Unlike mest Asian coun- tries, Hong Kong is charact- erized by an extreme shortage of natural resources. P pal

atiem central is necessa reduce the growth rate demand for foodstuffs and

other necessities..

郭日僑

Population control in Heng Keng can ease the burd-

en on

government in pre- economic, social, and

administrative services te the community, thus releasing public funds fer the improve- ment of the economy and assi-

stance to industry.

(+)

·明德出版社朱安林提供資料 Chemistry (16)

Solution to 0.22

A is copper(II) carhonate Bi copper(II) chloride

solution;

Cis

carbon dioxide;

D is copper(II)oxide;

copper powder.

(ii) (1) CuC

+21C1 C&C]2+H2U+CU2

CucCz

2C004C

Molecular mass of CO2=!4

Mass of C in 1,48 g of Z

mass of C in (0,, obtain ed in combustion.

12 x

2.64

0.72 g

日七廿月一年九七九一圈公年八十六國民華中

六期星

Hence, the molecular for ula of Z is C ̧ñ¿0,

(iv) The compounds are:

(1) CH2CH,COCH

propanoic aci

(2) CH-COOCH,

methyl ethaneate

(5) HCOOCH,CH,

ethyl methanoute

Solution to 0.24

8

X is ethanol, CHCH20

ethanoic acid, CIL CUOR

18 ethyl ethanoate, CH3COOCHCH

(11) (1) CH ̧CH2OH + 2(c)

CH COOH

ethanoic acid

(2) CH,CH2O!! + PC1

CF_CIL2€1+POC1+ICI

chloroethane

(3) CIL COOH + PC15

ethanov] chloride

(4) CH2COCH + CH2CH¿¢f

CH CONCU, CH2 + Ilg

Molecular mass of H10×36 (iii) 4 colourless gas is

Mass of C in 1.48 g of Z

mass of II in water obtained on combustion

1:08 18

0.12 g

mass of 0 in 1.48 g of 2 = (1,48

0.120g 0.72

In the past few years, Hong Kong has experienced a rapid process of industri.

lization and becomes an

But export-oriented place. inevitably Hong Kong has lost

in her comparative advantage labour-intensive products

because of rising wages at

home. The only beneficial:

way to maintain her exporta'

competitiveness in overseas

markets is to improve the labour skills and industrial technology, To achieve this a good human capital mast be improved. Thus it is necess- ary to have adequate training programmes for the young generation, while at the same (ii) Molar mass of 7 time population control

essential.

e. In recent years, Hong Kong has experienced serious inflation which adds diffi-

culty to her export sector.

To curb inflation, 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 populat-

PK 319151–3

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0.64 g

Kolar ration of CI

0.12 0.64

06 0.12 0.04

3:6:2

Hence, the empi ical for mula of 7 is CU

0,296 x

24000

96

Bence,

relative molecular mass of Zis 74.

(iii) Let the molecular formula

of 2 be (C.

Then

relativo molecular

mass of ZEDE

n_x (12x3+126+16x2 7kn

74 (as calculated in (ti)).

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evolved which is hydrogen

He 2CII_COON + Mg

(CH_C00),NF

(iv) (1) Gas G is ethene.

(2) CF,CH,OH

+ H2O (3) The bromine solution

would turn from orange-red to colour- legs.

Carbon dioxide at first. reacts with limewater fo form the insolühle calci- un carbonate which appears as white precipitate However, excess carbon

dioxide will react with caltium carbonate to give calcium hydrogencarbonate. which is soluble in water thus giving a clear sol ution again.

·CO2+Ca(OH)2−>Ca€©z+līg0

C©g÷Ca©© z+Hg 0 —≈Ca(HC0z) 2

(ii) Carbon dioxide basically

does not

FER9kt burning,

condle flanie.

shes the

However,

burning magnesium produces

so large an amount of

energy that carbon dioxidel

dezom¬osed inte carben

end oxygen and the oxygen thus liberated ran support the burning of marneSINU,

PMA

·21g0

Solution to 0.

8

(1) Both the forward and

the backward reaction will increase in rate (2) The equi)ibrium

position will remain unchanged because the number of moles of · reactants and that of products are the same

(if) This indicates that the

(b)

forward the

endothermic.

19

It is because these paints consist of leäd (11) ions and a fairly low accumulation of this ion in human bodies will be fatal.

In the presence of water and atmospheric oxygen copper is converted to copper(II)hydroxide slow- ly which then reacts with carbon dioxide in air to

hydrated copper(11) carhonate which is bluish green in colour.

̈4€u+2H20+0,

→4¢u(08),

Cu{0}}2+CU2+n}!q{

ity.

Caco ̧ * (n+1)II,0

Hydronium ions, H2O responsible for the acid-

When sulphur tri-. oxide dissolvea in water, it ionizea to give hydro- nium ions, thus being able to inru blue litmus red.

80z (g) +0,0(1) —P30*(aq)

SO, (aq)

(iv) Copper, being less elect-

ropositive than zine, cannot reduce zinc ions to Zine; however, it can reduce silver ions to silver because it is more

Lectropositive than

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silver.

Ch 24g (aq)

(an)

ig

Silver metal appears

silvery needles,

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