1969-03-19 — Page 22

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1969 中學會

·題預習

化學科

sodium z-inca te

(十九)

·王錦釗

CHEMISTRY (19)

Solid zine hydroxide is

4. soluble both in water and sodium hydroxide

solution

soluble in water but insolubis in hydro-chloric acid solution

soluble both in water and hvordenloric acid solution

insoluble in water and insoluble in 8001шm hydroxide solution

insoluble in water but soluble in sodium hydroxide

when co Litres of carbon monoxide are completely burnt, the volume of gas produced, measered at the original conditions, is

A

22.4 litres

B 11.21 litres

44.8 litres

D 14 litres

E 28 litres

In the Contact Procesa

A. the absorption of pyrosulphuric acid in water is

the principal chemical reaction

sulphur trioxide de first forand by bruning. sulphur in air

the sulphur trioxide is first greatly purified all impurities must be removed before the 502 enters the Contact Chamber

none of these

Consider the reaction of hydrogen sulphide with (i) copper sulphate, (ii) aluminium sulphate, (fil) zine nitrate and (iv) ferric chloride, Lus reactions result in

a black precipitate in (1) and (111) and a reversible reaction in (11)

a white precipitate in (iii) and a vellow. precipitate in (iv),

G. reversible reactions in (ii) and (iv)

a blus precipitate in (1) and a black precipitate in (iv)

E. black precipitates in (1), (11) and (iv)

which of the following pairs can be distinguished

merely by heating them?

A

Copper oxide and manganese qi0X109

B. Soot and charcoal.

Potassium nitrate and sodium nitrate

Copper oxide and calomel.

-

E. zinc oxide and aluminium oxide

三女星

日九十月三年九六九一番公年八十五國民華 育教

Q.1 E Solid zinc hydroxide is insoluble in water. It

is amphoteric in nature and, hence, will dissolve in sodium hydroxide to form sodium zincate

Zn(OH)2+2NaOH =

1.2 E The complete combustion or caroun monox120

be represented by the following equation:

Two isotopes of the same element differ in

A. the number of protons in the nucleus

the number of neutrons in the nucleus

the number of electrons surrounding the nucleus. the valency & So

0.8

E. the atomic number))

f. The gram molecule is the same as the gram equivalent

in which one of the following groups?

Sodium carborate.

9.9

Potassium permanganate, oxalic acid, sodium hydroxide

Copper oxide

Sulphuric acid, ammonium chloride, calcium

200

2 mol.

2n mol.

* 2002

2 mol 2n mol.

Applying Avogadro's Hypothesis we have

1 vol.

1 vol

i.e. 28 litres of carbon monoxide will pr

28 litres of carbon dioxide,

3D In the Contact Process for the manufacture of

sulphuric acid, all the impurities must be removed before the sulphur dioxide exters Contact Chamber so as not to 'poison' the catalyst, platinum.

B Aluminium sulphide and zinc sulphide are white

in colour, cupric sulphide is black, while ferric sulphide is yellow.

Heat some zinc oxins in a test tube. As it becomes not, the colour will turn from white to yellow. Un cooling, it becomes white again. There is no colour change when aluminium oxide is heated.

Atoms or the same elements can have different atomic weights, although they have the same chemical properties. The explanation is due to the fact that each element has atoms with different numbers of neutrons, which causes the atoms to have different weights. The atoms of different weights are said to be isotopes of the element.

наназ 23+1+12+4

Molecular weight of MaHCO Squivalent weight of NaHCO2

1-35.5 36.5

The molecular weight or nGL = 30.5

The equivalent weight of HCI • 36.5

2x{56+32+647": 2x152

Fe (SO

16

The molecular weight of. Fesu,

一九六九年

考試預習力

英文

T

王淑方

LESSON TWENTY

SECTION THREE

19-3-69.

ENGLISH LANGUAGE

COMPREHENSION (Continued)

EXERCISE 28,

Read the following passage carefully and then answer the questions that follows

'Fingers were made before forks. We rarely hear this saying except when some child gives up the struggle for nicety and dives into has food with his fingers our forbears did up to the seventeenth century,

A fork 18 an ancient thing, one of the first tools man ever had, vet no one thought of eating meat with one for many centuries. The ancient Egyptians, had big wooden forks which they put to agricultural uses, and since very ancient days people everywhere have used pitchforks, hayforks, and digging forks; there were too in common use fish forks -* used for spearing bụt nor for eating fish. There are also records of a vicious "weapon called a fork which had fines provided with

barbed books, and ugly indeed must have been the wonnas inflicted by it.

The idea of caving with 8 TOPKs came into suro

from the East some two centuries before ne tirst record. of any table, fork in England, this being a fork made of crystal which belonged to Edward I in the late thirteenth century. The metal forks with glass handles, possessed by Henry VIII were employed only to pick up the strange sticky Indian preserves called ginger, as also were the forks of Queen Elizabeth with their ornately carve ivory bandlès.

The custom of eating meat with a fork was wide- spread in Italy by the fifteenth century. The English explanation for this affected mannerism was that the Italians were averse to having their food touched with fingers seeing all men's fingers are not alike clean'. Anyone who used a fork to eat was well ridiculed in England for another hundred years and pronounced effe- minate or overnice. Finicky people, however, gradually adopted the custom and braved the ridicule of their fellows, and by the late seventeenth century Learning to handle a fork was an essential part of every genteel young person's training. By the end of the century the use of forks was prevalent.⠀⠀⠀

Hapted from THE SOUP STONE(Leach).

152

The equivalent weight of FeSO,

2 x 152 1

(2)

(3)

For each of the following find a word or similar meaning IN THE PASSAGE:

(f) richly adornedi

"ornamented too

much

necessary.

elegant, well-

·bred

evil

caused or imposed

fruit, etc. which

ancestors

prongs

general experi- ericed

Copper, being more electropositiva than displace from aqueous solutions of its sei

When 20 ml, of N-Nach 19 saaea to w m. DOUZ the resulting volume is 30 ml. of solution,

ontaining the equivalent of 10 ml. of N-ION

the normality of the resulting

has been preser

Sd the

ancient Egyptians use forks for?

e three kinds of forks used in ancient days.

Explain in what sense 'ugly' is applied to wounds in line 14a.

(5) Give the meaning of 'record' as used in line 17. (6) State when and from where did the idea of eating

with a fork come into Europe.

(7)

ཋཟེ་"。

In what use were the metal forks emploved in Henry VIII's days?

Why was the custom of eating meat with a 1ors widespread in Italy by the fifteenth century?

10.

carbonate.

Ferrous sulphate (acting as a reducer), sodium hicarbonate. marochloric aci

X is more electropositive than gopper, which is more

lectropositive than 1. Therefore

I will give off hydrogen from a dilute mineral

acid

Y will dispiace a from solution in electrolysis

A will yield hydrogen with concentrated sulphuric acid

copper will displace iʼIron SOLUT 100 corner will dianlara X from solution

If÷20 mL. M-NaOH solution were added to 10 ml. N-HC1 solution, what volume of water would you add to the resulting NaOH solution to make it 0.01 Nỗ

A, 10 ml.

B 100 ml.

C. 970 ml.

D. 990 ml.

E. 1000 m

Which series do the following functional

represent?

A. alcohols

B. eaters.

ether's

D. olefine a

paraffin

No NaOH 10 ml of NUT

1000 ml (of 0,018-NaOH

Hence volume of water that must be added to make the the resulting solution.

0.02N = 11000 - 30 mLL

970 ml.

Q10 DC shows the double bond of the unsaturate

nydrocarbons, the olefinss.

Q118

batera have the general formula

500.0 -

Q.12 C Stners have the general tormila

13 8 The general formula of the paraffins might be with

The general formula of the primary monohydric alcohols is.

R - OH

questions for next week:

IMAL WOOK, we will again examine a "number multiple choice questions.

SECTION FOUB

FRANSLATION

EXERCISE 29.

Translate the following passage Tara Chinace,

The orange is a very common fruit and in my opinion the best. It has a delightful, sweet taste which I am very fond of It is good for the health. It is safe to eat because it is peeled before it is eaten. It is round, and young children can use it for a ball and can flick the pips at their enemies. More- over, its bonesty appeals to all of us. If it is going to be bad for the best of us are bad sometimes - it begins to be bad from the outside. On the other hand. the pear often looks fresh but is rotten inside. But: the orange has no hidden faults. Its outside is a mir- ror of its inside, If you are quick you can stop the shop-keeper before he slips a rotten one into your bag.

EXERCISE 30

Translate the following passage into Chinese:

On a splendid September day, I left my native land After a very interesting journey I arrived in London. I was amazed at the difference between my small village and the huge city. What traffic What an uproar in the

streets! At first that

after an hour or

so

noise nearly deafened me, but

I became used to it. Everything wAS

new and strange and I must confess that my first impresse ions were not very favourable. When I arrived at the. hotel which had been chosen for me by a friend, I felt very tired..

· I had seen a great deal in one day, and felt in need of rest in mand and body that evening.