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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