1988-01-21 — Page 33

育教憍華 頁一第張九第

1988中學會考 試題預習專欄

歷史(十七)

明淕出版社

MILL & DALE PRESS

Revision Exercises

for

Cert. Exam. (1988)

HISTORY (17)

Describe Japan'a activities in East. Asio during the PirAL World War. How did China and the great povera react to auch activities?

The East Asian inter- national scene whe peaceful and scobie before the outbreak of the First World War Su 1914, However, during the war, the European great powers were preoccupied vita battlea, and s Japan seized the opportunity when internatiomi constraint was absent to advance

WBT

her interests in the Eust Asian region.

Pirst, Japau entered

on the side of the Allies Ihritain, Pranee and Russia) against the Centrál powere (Germany and Austria) and made use of the Xunse to seize Jiaozhou Bay in Shandong

1988中學會考 試題預習專欄

化學(十七

明遖出版社

MILL & DALE PRESS

Revision Exercises

for

Cert. Exam. (1988)

CHEMISTRY (17) Question 25

(a)A large crystal of

calcium carbonate was added to 100 cm of

2 H hydrochloric acid (an exces) in a flask and the mixture vas shaken gently until the crystal was completely dissolved. 4,2 g pure metallic carbonate (X00), in

form of lamps, was then added into the flask. The flask WUB kept at constant temperature and the carbon dioxide evolved vas tried and

collected in a pos syringe, The volume of carbon dioxide was recorded at 20-minute intervals and corrected to room temperature and pressure. The results

of the experiment

were ahown in the following graph.

* * * *

1PM 120

(i) Write an equation

of the reactiun between the metallic.carbonate and the hydrochloric acid. (ii) What is the purpose

of adding a large crystal of calcium carbonate to the hydrochloric acid at the start of th experiment?

(iii)When is the

reaction at its greatest speed? Explain briefly. (iv) Why is there no

more increase in volume of gas after 100 miesten? (v)What is the muximum

valume of learbon dioxide obtained? (vi) Calculate the

relative atomic mass of metal X. (vii)How many minutes

would have elapsed. when half of the

日三初月二十年卯丁曆夏

of China from Berwon hands. The British were of course displeased, but

aince they were busy with war-efforts, they just could not put up any effective opposition. Aritain needed Japan's cooperation as long as the First World War was

on. Besides, Japan said that Jiaozhou Bay

would be returned 10 China after the war, By late 1914, all the former German rights and leases in Shandong had fallen into Japanese hands.

At the same time, the Japanese navy turned to the South Pacific and occupied the German island colonies there, such as the Marshall and the Yap. Needless to say, China was helpless and could not resist Japan.

The reasons for the Japanese expansion were Long-term. Many Japanese buainasuen, politicians and militarists had for long advocated

stronger foreign policy (which can

against the traditional policy of co-operation with the western powers).

This younger generation of Japanese were more and more influential and were in disobedience to the genru ("elders", "nged Meiji leaders), who favoured continuation of the traditional policy.

In China, Japan's position was declining. Politically, Yuan Shi-kai was unco-operative

with Japan but was pro- Western, or more exactly, pro-British. Secondly, economic competition and rivalry posed great threats to Jupan's

metallic carbonate Was reacted?

(vii) Sketch on the

KAMA

graph the curve you would obtain

respectively.

(1) if using powdered

metallic carbonate;

(2) if the fleak being, maintained at a

constant temperature lower than that in the above experiment. (b)Suggeet a kisple

(1)

method, physical or chemical, by which you could obtain a pure sample of the first- home substance in

each of the followin

mixtures.

Copper and zine

(ii) oxygen and

WAH KIU YAT PO

interesta in Manchurin, especially as Japan di'd not have the superior economic power to compete successfully with the West, Many Japanese ultra-nationalists favoured a more forceful policy toword Chinu, The Black Dragon Society, for instance, argued for the demand of for- reaching concessione to be made to Chine. This was the background to the presentation of the 21 Demands to Yuan Shi-kai by Japan in 1915, only a few months after the seizure of Jiaozhou Bay.

How did Yuen reset to the Demands? On the one hand, if be accepted the Demanda, he would receive Tapanese support for his attempt at restoring a monarchy. On the other hand, however, he knew how treacherous it way if he submitted to Japan' aggression in the face of forceful Chinese nationalism.

Realizing that Chin slose was too weak on resist Japan, Yuan turned to the other great powers, especially the USA, for assistance. He deliberately delayed the negotiation for the Demands, while revealing the bit by hit to the Weat. The reaction vi the USA and Britain was general opposition and protest. But because of the First World War, they decided not to intervene to check Japan. As for Pratte and Russia, objection was raised, since they wanted to win Japanese friendship and draw Japan into more active war-cffori

gainst Germany and (1) What wodleshare

happen gelively,

(1)co

and (2)aphydra

copper(II) sulphate?

gp equation of

thu the changes wed in (i).

(11)What is the purpose

u atteching » drying bulb with anhydrous calcium chloride to the E-tabes?

Using the give date,

calculate

HON

oitrogen(IV) oxide (iii)Nitrogen and carbon

dioxide

(iv) Sodium bromide and

annonium bromide Sodium carbonate and ralcino

carbona te

(v)

(VL) Concentrated nitric

acid and concentrated sulphuric acid. (vii)Ethene and ethane (viii)Hydrogen gas and

carbon monoxide

(ix) Sulphur and iron (x) Magnesium oxide and

zinc(II) oxide.

Question 26

(a)The experiment as

shown below was to determine the composition of weter by maak. Hydrogen geS was passed slowly

anhydrous

through the apparatas.

boat containing

dry copper(II)

calcium

chloride

oxide

drying bulb

anhydrous

U-tubes

containing

calcium

anhydrous

copper(II)

chloride

sulphate

powder

1080

The following results were obtained?

Mass of the U-tubes with anhydrous copper(II) sulphate at the start of experiment 32.502

Mass of the U-tubes with copper(II) Aulphate at the end of experiment.

37.375 x

Hess of the boat with dry copper(II)

oxide at the stor -12.147 K

Masa of the boat with copper(IF} oxide at the end

16.590 g

(1) the mess of water formed during the experiment; and

(a) the mass of oxygen contained in the

gter formed during Life experiment.

(v) What is the mass of

tysraontaisod inter-formed? Hence indby rutio hydrền axygen compugi jei water.

(vi) Why must copper(II)

oxide by dry?

(d)

(i) Ethane is considered

to be a "saturates" hydrocarban.

(1)What is meant by

the term

"aaturaled"? (2)Give an example of

unsaturated hydrocarbons.

(11) Name the compound

that would be obtained when, in an molecule of ethone,

་

(1)one -atom is

replaced by an OR group; (2)one H-atome is

replaced by a CCO group;

+

(3) two H-atoma are

removed from two adjacent carbon atums, one from each carbon atom.

(ii)If two H-atoms on a

molecule of ethane are replaced by chlorine atoms, it

is possible n obtain two different compounds as the product's...

(1)Give the structural formulae and the IUPAC tomes of the two possible products.

(2)What relationship do they bear to each other?.

Question 27

(n)A series of reactions

is summarized in the following block. diagram. Study it carefully and then Gnaver the questions which follow.

報日僑華四期星

Austria. France, even advised China to accept the Demonda.

Without foreign aid, China had no other choice but to accept the 21 Demands. Accordingly, all German rights in Shandong were transferred to Japan; the Japanese- leases in South Manekuria (Laabum and Dalian) were extended to 99 years; control over the Hanyeping Company was given to Jepan; and Chine promised that ports and falanda along the Chino coos% would not be ceded to other countries.

However, Japan still feared that all thrat. privileges might be lost once the war ended and Western oppositi on revived. Thus she made agreements witli some European powers and even China as kafeguarda. Firstly, an alliance was made with Russia in 191h, Secondly, secret agreements were made with the Allies in 1917. The Allied powera vented greater Japanese participation in war: they therefore secretly promised to give Japan Jianzhou Bay in Shandong,

An agreement of friend-

liness was made with the USA too. The USA expreted that this would slow down Japanese

expansionian. Thirdly, Japan extended some Ivans to the Beijing warlord goverment of China 90 as to bribe china to be co-operative in Japone newly acquired gains. Eager for money to fightg against other warlords, the ing government Maptele Tun

The Siberian

dark-

Pule- grey i Jgreenk pew-SO, solu der

A

tion

less, inflam mable expla sive An

evapura-

tion and crystal- lization

palg-

preen

crystal- line solid C

Strong heating

excess

dil No Off

dirty- green precipitate

#

reddish-brown

sulid F

dil B

evapura- tion to

dryness+

sireng

heating

yellowish-brown

solution P

exceas

dil NaOH

reddish-brown

precipitate G

heating solid C truly, water vapour laineni T addition the ite deuse fumée consisting of a gas X and a sublimate T. Gas X ha a pungent sell and turus acidified potassium dichromate green while sublimate Y reacts with bariun chloride aulution, acidified with dil HC to give a white pracipitate 7.

(1) Identify and name

the aubstances A. B. C, D, E, F, G; X and Y respectively.

(ii) Write the equations

of the following: reactions... (1)Adding A ta dil

(2)Action of heat un

C.

(3)Adding E to dil

(4)F and NapH soluzion (5)Formation of D (6)action of heat on D (iii)Name two reagents,

one gaseous and one sulid, for converting E to A, and give the appropriate eguations. (b)when dilute sulphuric

acid is electrolysed using platinum electroles, two, gasas are; obtained. ́.

(1) Name the gases

liberated at the cathode and the nnude respectively. (ii) Write the ionie

equations of the reactions at the rathinde and the nnnde respectively. (iii)The volumes of the

two gases collected are expected to be ine 1:2 ratio, yet the volume are

Expedition occurred, in which Japan took part, in T918. The Expedition was an Allied attempt at checking the spread of Communism to East Asia after the Bolshevik aeizure of power in 1917 in Russia and bringing Russin back into greater war-efforts against Germany and Austria. Japan joined it because of territorini ambition and the desire to keep Communist threats away from Manchuria (Japan's sphere of influence). Yet the Japanese military sent in many times the number of troops originally decided on. Again, however, the Allied powers could do little to restrain Japan, not until the First World War ended in 1919.

In concluaion, the Japanese cleverly made use of the opportunities when the great powera vere preoccupied with war and made great gains, territorial, economic and political, in the Bast Asian regions. The traditional balance of power in East Asia was upset in such a way.

附加數( 十七 )

明湧出版社

MILL & DALE PRESS

Revision Exercises for

fert. Exain,

ges acting collected during the early part of th electrolysis is always slightly less than half of the ether.

(1)Why is a 1:2 ratio

expected?

(2)Suggest a reason

why such a ratio

is not observed in practice.

(iv) How does the method

of conduction of electricity through

dilute sulphuric

acid differ from

that through a

copper wire?

(v) What would happen to

the concentration of

the sulphurie neid

in the above

electrolysin?

物理(十七)

MILL &.DALE PRESS

Revision Exercises for

Cert. Exam. (1988)

-PUYSICS

Example:

A rectangular, solid is submerged in a liquid X of density. The height and the cross sectional oreo of the 'block are h sml. Á respectively. By calculat- ing the vertical forces an the top (F) and on the button (F), show that the upthrust Exerting on the solid due ta liquid X in Jgy, where V is the volume of the solid.

Solution:

19ud X of-density

Let Po=aturapueri e

pressure

日一廿月一年八八九一曆公年七十七國民華中

頁四第張八第日三初月二

ADDITIONAL MATHEMATICS (17)

(Ans)

Integration:

Worked examples:

1. The gradient of a curve

at (x, y) is given by 2sinxxin3x. If the

curve posses through the origin, find the equation of the curve,

Solution:

=

dy Given: - sinsengiz

Jinxcosxdx

- Jeoglxdx-jca×4xdx

2-sin4x+c Since it passes through (0,0)

==Ü+ c=0

the equation of the curve is

y=sin2x-sin4x

(Ane.)

2. Evaluatex" x

Solution:

Putting x-240

2

x=4'2

relax

JU

2

2

}dx+

་༣

12

exerte by the liquid on the abjetlimedes stat

This Tigtotally. oylartha Ry, immersed in

a fred et experiences an upthrust which is equal to the weight of the Theis displaced,

In particular body florts on

flu

its weight is bare fea

the upthrust. Henc hove.

"a floating body

displaces its own weight of fluid," This statement is the LAW OF FLOATAT JON

Note: 1. When a body is

(2√2-1)

Exercise 9

1. Evaluote. [1-x] dx

(a). Evaluate

2

sin x cosxdx

(b) Evaluate

อ

(caa4x+cqs6x)x

and hence find the value of

3. Find the indefinite intergrals with

respect to x by using a suitable substitutiou:

(a) fx√x2+1 dx

ل (0)

1+x-2

- dx

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J-14-x2

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5. Find the ratio of the

volimes forned by retnting the area enclosed by the curve

the line 1 and the x-axis

26

(1) about the x-axis, (11)about the y-axia.

A

Bw-upthrust on A

in water Bxuptbrust on A

in liquid X.

TH

Figure (a). Figure (b)

(1) To figure (a).

TW = RN In figure (b).

BW T

248

-10N (Aus)

totally immero£1}[w = (d_)(g)(v)

it displaces He own volume of fluid.

2. The Archimie ding Principle go bu applied to liquids and guy. for the fluid cotera natjevs

liquing and gases. 3. The Erst acts

emerezly upwards durgught the C.G.

The fluid: desplaced.

Example:

Buoden block A is eighed in oir, in water and in liquid X as akawa in figure (a), figure (1) and figure (c) respectively.

water

Figure(a) Figure(b)

'metal

Voter

liquid x

Figure(c) Figure(d)

If the density of water in 1000kgm Pressure at He Po-dah (a)(i) the upthrust on A

, calculate

Pressure at N= Po-fgh

Fg=(Po+f£g)A

The nat forse noting upwards due to the pressure of the liquid

= g(bg=h; }A

/gla

the upthrust V

(ans.) Note: Refer to Archimede's

Principle...

4.11 Archimede's Principle and Law of floatation When an object sa immersed in e liquid, it ia found to lose weight, It is due to the upthrust.

in water

(ii) the volume of (iii)the H.D. of Å (iv) the upchrust on A

in liquid X (v) the density of Liquid X

(b) A lump of metal is

attached to the bottom of the block und cause the wooden black to float in water with ta upper surface just covered by vater an strewn in figure (d). Pind the mess of metal attached if the density of the

-3 metal is 800@kgm”

Solution; (1) Let

Ttension in the

string Waweight of A in

Dir

V-volume of A

10 (1000)(10}(x);

·V = 10~33

(Ans.)

(iii)Lot - density

of A

((6) (†)(10)(1073)=8.

JA

- 800kgnTM

..R.D. of A

«(800/1000) = 0.8

{AUB.)

(iv)In figure (s)

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T + x = W

0.5+8x - 8

B. 7.. SN

#

(дв.)

#

"A

BX W.

Figure (6)

(v) Let xdensity of

liquid X

(1973)

(And.)

(b) et Mmass of metal·

required.

2. Volume of metal

required (H/B000) Total volume of the

combined hody

= [(M/BUOD)+V} = {(M/BUDU)

*10-3)

*.Upthruat due to

water

B={/w){g}{(M/8000),10"}

= (1000) (10) ((M/8000)+10-3

Haight of the combined

body

V=Mgaw

8+10M

According to principle of floatating

Bk

(5/4)+10=8+1OM

M 8/35.

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