1985-11-04 — Page 20

頁四第張五第日二廿月九年丑乙展夏

place at an elevated': temperature,

WAH KIU YAT PO

Mnog

報日僑華

1986

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Revision

for

Cert. Exum. (1981

CHEMISTRY: (6)

UEGINELD C. CHE

MII & DALE PRESS LTD

Solution to 0.7

(a) 250,(x)+0μ{m}

(b) Platinum or

Vanadium (V) oxide.

(c) This is to dry

Bolpur dinxide and oxygen,

(d) Solid sulphur

trioxide looks like white silky needles.

(e) This is to prevent

the moisture in air from entering into the receiver d the ree

(f) This indientes that. the reaction is exothermic. The peyt liberated during the reaction inintains

the catalyst at a high temperature....

g) The catalyst is

initially heated

decause the reaction

would paly takes

1986

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Revision Exercisẻ

for

Cert. Exam, (1986),

HISTORY (64°

VIOLA YAY WOND

MILL & DALE PRESS, ITD.

European history from 1919 to 1959 is often known us the "inter-war

years, for these reasons; 11) In 1919 we Paris.

Peace Conference settled the First Vorld ar

12) Im 193918)

war,

world the second war

World, broke out.

43) In any ways

the

First World War left beltind (many unsolved problems for Europe, and these problems helped bring about the Second World Wal

In this and the coming isgues, Ne stall learni following

aspects:

Av

Unsolved problema of the First World War after 1919 (political social, economic, etc.)

Rise of Fuscist and Nazisi dictatorships. in Italy and Germany in the 1920× ̧and- 1930s, which could in part be explained by the above unsolved problems.

C. International

aggressions-committed by. Puscist Italy and Nazi Germany in thei 1950s.

Attempts by the Festern, Powers

{Britain and France) ut checking international

ggressions failure of the league of Nations, failure of appeasement.

Note the following:)

(1) above refers to

The consequendes of the First world warg

(1) is a result,

76) and (9) Turm the

causes of tire Second World

Tug you can see how the First World. Var led up to the Second World War. (from to De

(1) befcets of the Paris Fence Settlement

(h) Formila mues of Sis

=52416x3

According to the following equation, 250+0

(2x22.4

atst. ♫ ·

y dm

280

2001

Vol, of

-2x22.4 dm

related 3.2

8yu

(1) When sulphur trioxi

is passed directly into water, misty acid drops of concentrated? sulphuric acid, are. Forued, However, sulphur trioxide dissolves smoothly

(J)

in concentrated sulphuric acid to give oleum JS,

which, on dilution with water, will: give the ordinary concentrated sulphuric acid,

(i)A greenish-yellow

gas with a choking Amell is given off. The gas evolved is chlorine, gus Concentrated HSOL displaces HCl from NaCl and HC1 is then

oxidized to Cl2 by

As a result of the settlement, tuere' were two kinds of

powers in Europe:

powers that wanted to.

change the seltlument

-elg! Germany," (which

felt that, it was.

humiliated in many

ways), Italy (which claimed that it was

not justly rewarded), and Soviet Russia

(which was not invit-

ed to the 1919 reace. conference and had no interest in defending the settlement),

powers that wanted to maintain the

settlement:

France (which aimed at at preventing the revivial of Germany) Britain (which wanted pence at all cost so that trade would be good) and the USA (which generally withdrew from European affairs after 1919).

(2) Unstable small states

in East Europe - The First World War help-

ed bring about revolutions in Russia and Austria. As a result, Hussin became a communiiet state since late 1917. And Austria was broken, qu into many small states like Yugoslavia, Czechoslovakia, etc.. These Eastern European states had shollow democratic tradition. They might be easily conquered by aggressors. In the 1930s, Germany was the aggressor, Other powers tolerated Germany at first. They used an "appòssement polieg": Lowards Germany Giles trying to please Germany). But they could not let Germany "conquer all East

Europe. In the end' they resisted Germany. So war broke out in 1959 - the Second Worlst Far.

(3) Communi am versüs Fasciso - Russia becumo, a „communist country since late 1917. People in "capitalist countries such as Germany and Italy feared that comunism would take their countries, oo, Thus fascist groups were formed, 2.e. extreme nationalis groups aiming at saving their countries from communist penetra- tion. Society becarie vary instalade s you will see, „Füge i-am tuch Irly, and Nazism took Germany. These dictatorships

then committed

Aggressions against #ther countries. In "the bend the Westérie

NaCl + H2SO2 NaS0, +HC1 C1+Mn(MC),+2]LU+6],

(11)A reddish-brown gas

with pungent sell as given off. The gas evolved is nitrogen dioxide. Cone 80% displaces NO from 100, and 180, then

nxidizes Cu, giving off NO

Solution 108

The crystals turn

frou' pale-green to white powder and drops of colourless liquid are seen on the cooler purit of the test-tube. This is because iron(II) sniphate crystals 1ose tlicir water of crystallization on gentle heating. Fes0,711,0→→ FeSO2+7!.

(b)

(i)The gaseous products

consist of sulphur dioxide and sulphur trioxide.

i)Tue ions present in

the solution X are mainly sulphate ions (SO) Sulphite ions (SI),−1, Hydronium iona (H30*).

(iii)The compounds

present in the precipitate nee barium sulphite and barium sulphate.

(3)

2-

(as

Bus0, (3)

(iv) Part of the

precipitate would dissolve because barium sulphite reacts waru dilute hydrochloric acid to give bariun chloride and sulphur dioxidegen,

Basu_(») +21¢1 —→→→→ Ba¤1¿+

(v) (1)solid ris

iron(III) oxide:

+503(B)

(3)Formula musa of

Fens

=2x50+3x16 =100

Formula mass of hydrated iron(II) sulphate: ¬50+32+16x4+1887 -

=278

According to the equation beløv,

25e50%

Is cl

Zmol

(2x278)

Powers (Britain and France) decided to fight these aggres- sors, which brought about the Second World Mar.

(4) Nationalist feelings becoming tense - Before 1919, p autocratic empires. like Tapsburg Austria and Tsarist Russia rulcd. People fought. for independence against them. After 1919, empiras like these fell, and new democratic states came into being. The nationalist feeling of many European people became more intense. People in different countries were loyal to their. fatherland. When wor broke out, they were willing to Fight for their countries. Before 1914, wars were fought between- dynasties or empires, After 1914, WALA - were fought between peoplee, Wars became more. bloody too.

(5) Social disnontent and

trouble: Because of Cunstable economic

conditions, people became discontented. Different social classes ran, jatob conflict with one". another. Soldiers

could not adjust themselves to peace- ful lives when the var, was over. Violence increased. In fact, this he helped the Fascista and Nazis to come to power in Italy and Germany respectively. They found many unemployed people supporting tiem,

(9) Economic recovery

delayed by repara- tions The 1919 Versailles Treaty hid that Germany` should pay these to the Allie

reparations ti.e. a. large sum of money). This delayed the economic recovery, of Germany, over Europe, as a whole, the foundation of a sound. economy was shaken by. the First World Var. Although 'recovery was -ratagr quick in the

19204, à Great Depression hit Europe. Badly in 1929-32.

ON THE SECOND VORLD WAR FLOKE OUT" IN, 1979

(1) Germany and Italy

Tundër, the control of the Nazis and the fascists respective- Ly) covicitted, aggressions ugaljastite small sentries. The kather, poniera-fsuch as France, Britain)¦ ̈

at first appeased the oggressors,

e.

1 mol 160 B 3.2 B

Dut

resigtitan LTE,

later ride war 21 them when it became clear that further appeasement was Úseleas.

(2) Aggressions contited

by Germany and Italy. included the follow- ing:

a war against Euniopia by Italy in 1934.

b. The march into the Rhineland areas by Germany in 1933

The support for rebels in Spain by Italy and Germany from 1936-39

d. The invasion (ol

Austria by Germany. 1938

The invasion of Czechslovakia by Germany in 1938.

The invasion of Poland by Germay in 1979.

(3). Prom 1934, to 1959,

tiedotuer. powers did unt resist the aggressors.

Soviet iussia did not trust France and Britain, Stulin (of Soviet Lussi). thought that France and Britain' encourag -ed Germany to con- quer Fast Europe so as to weaken Soviet influence there.

b. Hritain was

preoccupied with colonial problema. She did not want to. act without the support of the USA.

The USA did not waist to get involved in European affairs.

d. France was afone. She

was too weak to defend against. aggressions. And sho: was not keen on doing that when the aggress.

ions were not b directed against herself

e.Italy and Germany

knew that the other powers dared not risk another world war to resist their Oggressions. The memory of the destructiveness of the First World War was too deep, People wanted to prevent Murent at cost.

In 1939, when Germany invaded Palomi, che western powers knew

that they must resist the digressora. They maker war on then.

生物()

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——期星

Big B

1

required

3.2 10

(2x278)

日四月一十年五八九一曆公年四十七國民華中 育教僑華

(4) Solution Zis iron(III)

sulphate

solution. The

hydrated

iron(II) ion is

responsible for the colour

(i)The two examples are

sodium sulphite and sodium sulphate (or sodium thiosulphate) (ii)The oxidation

numbers of sulphur in sulphite, and sulphite wodi sulphate are 44 and 6 respectively. (171)(1)Sulphurning

oxidized as its oridation number increases from +4 to

+ when sodium sulphite is converted to. Aodium sulphate

by bromine. solution2.

(2)Na 50+Brg+120

NaS04+2HBx

(4) The párt immersed in

cone 1,80, turns

from blue to white while the part above cone HS0 remains

blue is colour. This

is because tue Immersed part of' copper(II) sulphate crystal has been dehydrated, lation to ().9 {i} {NN; } «S04+2ROI!

K„S04+ 20,0+2NH

Revision Exercise

for

Cert. Exam." (1986)

BIOLOGY (6) ANTHONY CHEUK

MILL & DALE PRESS LTD.

Solution tó unit 3;

Heterotrophic Nutrition

(i) A

enamel

dentine

C

cement

blood vessela pulp cavity

alveolar: membrane

- нетте

(11) (1)5 -

-They provide the tooth with oxygen and nutrients for growth.

(2)P-It holds the tooth firmly in the jaw bone and allows slight Bovement of the tooth to absorb. shock, during cheving.

(3)0.-It give tooth

the sensations of heat, cold, pain and pressure.

(iii)Teeth are used to

break food into small pieces increose

surface area for enzyme action and to make swallowing casier.

(iv) Food (sugare) trapa between crevices of teeth support hacterial growtą. The bacteria change sugars into acids which dissolve the enamel and dentine of a tooth, Futher decay exposes the pulp cavity for infection by bacteria and, nerves being stimulated by food and bacteria 'cause painful

sensation.

are large with sharp cutting edges

Perbivorous animal e.g. rabbit.

premolars for holding food during: ia present between incisors and.

chewing.

wild flattened surfaces for

are absent or reduced

grinding up vegetution,

fur topping-

are absent

Kg80, +20

(i)Molecular mass of

15098-

TE

Concentratisa

Son

19. moltos

98

2012 M

*(K) originally present

30 -0.5x1000

-0.025 mol.

According to the equation below 20+#$%

hol Imol

90+240

(KOR) in excess -2x^{H_44) reacted

=2x (0.0x1000)

0.005-ol

12,

(KO) reacted with ammonium sulpante

~~ (0%£:!5-0.005)

0.02 mol According to equation below

(NH ) 50 + PHU

1 mol

tie

mel

reacted

-grn(Kol) reacted.

with it

--×0.02

0.01 mol Formula mass of

mess of (N)So

2,04g of mixture -0.01x132V

Canines.

Diastema

and molars

teeth

Carnivorous quimal e.g

ang

are small and pointed for nibbing meat

off bone

ore enlarged, sharp & pointed for killing prey is absent

with painted ridges for cutting flesh and crushing bones

are present for cutting fleak and

curshing bones.

Incisors

Premolara

Carcassial

salivary glands

liver

gall bidder duodenum cel on

checus appendix

anus

stomach

puncreas

Eilee

L

rectum

(11) · (1)E- (colon)-Tt.

absorbs water.

(2)L (rectum)-It is

for temporarily storage of faeces and for egeяtio

(iii) Mouth¬I→D→K→ E÷L→H

(iv) The acid kills

bacteria And provides an acidic médium for enzymek action.

The digestion especially of fats would be difficult Because of the absence of hite salts for emusifi- cation ands a suitable alkaline medium for enzymes action is not available.

(vi). Peristalsis (vii). (1)In rabbit," the

caecum is longer Viañ-in human to provide mo PU space to store the bulky plunt" tissues: It is housed with symbiotin bacteria, and. protozoa which secrete.cellulase Lo di gus1. cellulose.

(2)The smallest

-ing is relatively:

ly longer in rabbit than in

(2)The small

intest

ine is relative -ly longer in rabbit than in limit to provide.

(b)

13

of neoniun

sulphate in mixture 1.32

the

x100

(1)(1)The formula of

compound is VZ. (2)The formula of

compound in WY

(3)The formula of

compound R is XY. (4)The formula of

compound $ is X24

(ii)The bond present in-

compound is ionic (electrovalent) and that present in S is covalent.

(iii)The electronic

structure of

[G]

{G)

The electronic.

of S is

structure

(iv){1)The molecular

formula is. Zn- (2)The molecular

atructure in:

more space to

store the bulky plant tissues.

The inner layer of. Kis folded to form

villi të increase

surface area for aber absorption.:

The epithelium of the villus is thin for rapid diffusion

of digested food to tuke place.

The presence of

cupillary system and

lacteal in villus

to transport digested food.

The bread would.

carries out saprophytic nutris

and extracellular digestion while. dodder carries out parasitic nutrition

and absorb digested good directly from its hust, Part C DIARY

A is haustosium. It provides a firm anchorage on host stem and for "absorp -tion of water, mineral salts and nutrients from the host.

(iv) Bis flower fruit of

dediler.

E is sporangium of brend› mould.

Both 1 and. E will produce numerous seeds and spore's respectively. This increases the chance of successful dispersal.

C. produces enzymes to carry out extracellular digestion.

(vi) Perasitism

(vii)(1) autotrophie

nutrition

(2) parasitic

nutrition:

(3) saprophytic

nutrition

(i) Primary host is

human being. Secundary host is pig.

(i) (1)Thorough inspect ion of all meats by the government anthosity to ensure the meat 180 infected by bladder vorn,

'measly meat. must be discard-

(2)Meat must be

thoroughly cooked before eaten by gan to kill 11 the bladder worns, (5)The proper sewage

disposal system. prevents the human faeces toʻs come into contact" with the food of pigs and cattle. (iii)It is because

tapeworm is bathed in in a medium of digested food and live in a relatively stable envrionment, und well-protected. from enemies,

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