1966-11-09 — Page 15

BLU AN #TARI

WAH KIU YAT

中學入學試試題預習專

國中英文中學會考試題預習專欄

英文科

王鮮生

化學科(二)

王錦釗。

Time allowed : 25 minutes.

Fill in each blank with an adjective instead of the word

on the left 1

(a) honesty

Examples ang

The boy is not

She gave me

LOOK

(b) truth

She told me a

(e) difficulty de has done some

(4) glory

(*) depth

Our soldier on a

He dived into the sea which is

tory,

sung.

Choose the

woru to go where there. 19 an X... the Number of the word in the spac

space on the

the ri

Do

not write the word,

(1) Be could X see because the light was very díu

(b)

1 scarce.

2. hardly,

You X be kind to animais.

ought 2. need

Dick has brown X.

hust; 4. only

should,

may

hair

(0)

(d) He gave ne

ons of his. X.

coins 2. 001

money

dollar

(a)

CHEMISTRY (2)

a) in order to show experimentally that air contains water vapour, air is aspirated through a U-tube containing fused chloride. The U-tube is weighed before and after the experiment. The increase in weight gives the weight of water vapour in the air that. La passed through the U-tuba

期

日九月一十年六六九一脚公年五十五国民产中

PHOSPHORKS

共

fucce

INGRIASIS IN WẸGHT)

ALPIRATOR

-AIR from which "The poissia-das-

BEEN REMMED

lat volume of air originally in one ourette

left in the burette

oxygen in the air

Hence percentage of oxygen in the air

The litmus paper túras red, indicating that the gas, lastn spidio ocida.

aspirated through a Drechsel bottle containing lime-watere a) Pats piece of damp blue "litmus paper in a gas jar of cha gari

show experimentally that air contains carbon dioxide, 17

line water will, Tum milky owing to the insoluble chalk formed by react Lon between carbon dioxide and lime-water.

CO

carbon

Ca (OH)2

lime

Ca C03 calcium carbonate (chalk)

(b) add dilute nydrochloric acid slowly to the dolid. The solid will dissolve forming a clear solution when the solid just dissolves, the solution is distilled. The liquid distilling off is tested and found to be pure water.. The remaining crystalline solid is found to a salt, magnesium chloride: The magnesium oxide nas neutralised the hydrochloric acid to form a salt, magnesium chloride and water Magnesium >xide is therefore a base

Air from Murchf

CARBON · PIOXIDE

·HAS BEEN REMO=&D⠀

MyO 2 HOÀ

(c) Repeat experiment (b) using zinc

oxide It will be found the zine hydrochloric acid to form a salt, Zinc oxide is therefore a base

Mg C12.

oxide instead of asgnesium

-oxide, neutralises tine chloride and

200

2801

at last she got X the bus

out

10

Underline the word that has the same end sound as the

on the left

Example Storm

(a) Noise

(b) Side

(c) Mens

(6) Day

(e) Heard

alars / born / warn / farm / hàru

horse/toys/buys / house wise white. kin / sight 7 cry / ride

bit / cheap / fit / nic

hot / fine / hay / die / said

hurt / word wood / herà / hear

Fill in the missing words in this table

Yesterday.

(a) The sur.

(b) Ro tried to do it.

(c) She

down

Everyday

Now

the sun shines. The sun is shining.

He do it

She lies, down, Shi

Underline the right words whithin the brackets

The book is neither graan (nos, or) blus (6) Thay (bath, together) want to the zoo.

Te cross the harbour in a (steamer, ferry)

want to (borros, land) a book from you. (e) Tobacco is psed for (eating, drinking, smoking)

down

Fill in the brackets with the proper NUMBER of the part in

List B that belongs to each part in List A.

List A

(2) Jay took, a sho

(6) She failed

(0) Although he was poo

(d) I know

) Make hæste

({) She never talked

where ne 13vum.

but she smiled.

se he was told

we soon turned back.

( ) 5 in order that she mighs

there in times

() 6. he could do it.

7. but she tried agai

be as happy

9 or you will be lata,

Give the word which should come between each of the follow-

ing pairs

Simples

(4) Good

zorda

hot

Warn

Juture

evening.

roummer

co14

Meny

Change the following:

Into the negative forme soldier found the lost gun

could finish the exercise

ery soon.

(0) The boy caug the ball in the air

The balloon rose up quickly

My sister told me an interestin

(4)

each blank with a suitapi atman

(e) To show that air contains oxygen

LIME

K-WATE

A clean dry crucibla is weighed, A clean piece of magnesiu ribbon is then put into the same crucible and the whole is

weight of the magnesium is obtained by

the first weight from the second. The crucible the crucible in such a way that air can enter

support the burning of the magnesi

the crucible. When the cruci

OXFEED®ing the

the magnesium burni

the cruc

the game physical and

the crucible

is an Increase in weight about by chemical change with

2 MgC

A piece or yellow phosphorus is stuck si the end of à long thick piece of copper wire, and the whole is put into a graduated burette, the open end of which is lowered into a large beaker of water, The tap is opened in order to make the levels of the water inside and outside the burette the same. The volume of the air is then read and the tap 1s closed. The phosphorus amoulders slowly and water rises vert slowly up the burette tube. After a few days, the water

rising up the tube hater is then added to the beaxs the water inside and outside the burette is at the vane

The volume of the gas remaining in the buratte

They fought

(4) She will come

(e) They were fighting

Read the passage carefully

size,

g'olook.

the moment.

One day the Emperor or Japan gave the greeT Emperor of Ching a large parcel. In it was a toj. nightingale covered with jewels. It was not real but it could sing by clockwork,

It sang the san song many times. The Emperor and his friends heard it thirty-three times. Then the Emperor said that it was time to listen to the real nightingale. But the real bird suddenly flew away 80 everyone said the toy bird was much better than the reale

The toy bird sang every day for a year. At last something broke and the music stopped. The watchmaker manded it.

But he said that the bird was old and The Emperor, was very sad and he let the bird sing only once a year. After five years the Emperod became 112. Be begged the toy bird to sing, but it. remained silent,

The poor Emperor thought that he

would die.

All at once a beautiful song came from the window. The real nightingale was there.

Thank you, thank you!" said the Experor beautiful little bird. Now I know who you are!" Boon he began to get better.

"You

And

"You must never leave ma again," he said, shall sing only when you want to%

live in the palace. said the nightingale. Tulike Then I will sit on the branch

"many-congs to you.

four windo.

word

"Let me come

25th

your misi

of December

tune

Now add concentrated caustic soda slowly to some sine oxide in a beaker and stir gently It will be found that the oxide. dissolves in the alkali to give a clear solution of a soluble salt, sodium zincate The zinc oxide has neutralised the alkali to form a salt, sodium zincate, and water. Zine rige is therefore an acidic oxide as well,

"200" • 2NaOH

sodium zincate

Substance.

potassium nitrate (KNO2)

mercuric oxide (HgO)

red lead

(Pb30)

Residue

potassium nitrize (KNO,)

marcury (Hg) Litharge (Pb0)

Q. When mercurio oxide is heated strongly in a tro¬giene Lest "Lube,

of

it first of all changes in colour from red to black. Soon, drops

silver-coloured liquid condense in the cooler parts of the tube forming a silver band. When a glowing splint is put in the mouth of the test-tube; it is rekindled When tube is now cooled the residue slowly changes in colour from black to its original

colour

QUESTIONS FOR NEXT WERK.

330 gas, of a eixture or potassium chlorate and manganese dioxide on being heated gave 265 c.r. of exygen measured at 17,0 and 765 mm What percentage of potassium chlorate was there in the mixture? How would you show that manganese dioxide serves as a catalyst L. This reaction, and does not decompose to evolve oxygen?

DEBUTADE Britą expanzni azt une changes that occur when a piece of calcium is placed in a beaker of water containing a little rad 1itmus:

Arrange the metals, calcium, iron, sodius, potassium, magnesium – order of activity, giving reasons from their rauctions with water to Justify the order,

State Tive uses to which hydrogen is put.

The Emperor of Japan gave the Emperor of Chỉ na

a clock.

Jewels.

a toy bird.

cage.

The toy bird coul sing only

1 thirty-three song..

one song.

the songs it liked.

happy song

(c) Later the toy bird could sing only rarely beacuse

it was covered with jewels.

the Emperor did not like it

the Emperor was very sad

it was old and worn.

The Emperor began to get better because)

the doctors helped him

watchoaker mended the toy-bird

the toy bird was silent.

the real bird came back.

People liked the toy bird better than because

it was a gift

they had more time to listen to it

it could not fly away

it sang the same Bong.

The real nightingale could not live in

cause.

tanved to be free.

not like servants,

not sing.

people.

palace

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