1970-03-30 — Page 22

育教僑華

頁三第張六第日三廿月二年戌庚屣夏 WAH KILL KAT FO

REFERENCE LIBRARY

30 MAR 1970

31 to

現場與中文中學會考試題預習專欄 19770英文中學會考試題預習專欄

化學科 (廿一)

複習題十九

林錫衡•

堅道英文書院主編

(廿一)

複習項目氣體通性(二)

(輝題

(1)根据亞佛加德羅定律在同溫同壓下同容

積之一切氧体含有

((b)同數原子

分子

重量

氧体之泰氧密度(以氫為標準)是x,則其

子量是

(b) zx

dr

*/2

(3)氧之原子重16每升望若為/支 在同溫同 壓下某氣体每升重工克則此氧体之分子

(9) 32

(6) 64

(©) 5.6

(8

-4 CO2 ANTP #til

(9)44 £

(b) 44×2 €

44 × 224 2

(d) 44+214‡

5

反應 2 50G+ O2 → 250,參與反應的氧

容積若為/升則需二氧化硫

(2) 14

(6) 24

(0)=4

中則分子重

的氣體擴散所需時間

(6)以等分子數的氣体各盛於相等的容器

の長

()較短

(C)與分子量大的氣体相同

(d)較長或較短無一是規律

氣体在下列何種情形下較接近理想無体

(6)高溫低壓

低温高壓

10毫升氫擴散於一有孔容器需時30秒 則 50毫升氧在同一情况下需時

(Q) 150

(C):405)

(4)6401

(二)填-

題

(1)

克氧和8克氫的容積相等。

(2)在標準狀况下氣体B每升重25克則氣

体B分子量

(3) 273°C._ IR 2 €/$%£ $ 27 #

(QUE CO 8000 4 $100 cc. I AL≥WRU

(湿、壓如前)混合氣体之總容積為

(5) 10C.C. 之氮)

そ観化合ま身

(()在製造二氧化硫過程中,10克之硫

尧氧結合;用10升之氧可製得二氧化硫 升可將其變為三氧 AL BL. ( S+Q → SO2, 250, +0,250,

(7)氣体G的撲散率是氧的字,女的分子量是

(三)簡述

(1)亞佛加德羅定律

(2)蒸氣密度

(3) 克分子容積

(4)亞佛加德羅常款

(5)氧体反應容積定律

(6)氣體擴散经

(7)理想氣佳

複習題十八解答

(一)(1)常数波義耳定律

(3)絕對溫度查理定律

(3)四倍

(4) ta te

酸快

(6)/言大氣壓

地理科

GEOGRAPHY (21)

With the aid of skason maps, examine the factors) which control the climate of Asia,

The chief factors which affect the climate o Asia are:-

(1) CONTINENTALITY

Owing to tha buga size of the continent,

· most parts of the interior are very far away from the sea. A land surface absorbe and gives out kent more rapidly than a water surface đờm, Ân a result monsoons are forasd. because of the different rates of heating and cooling of the land and the sea in summer and in winter.

In winter, because of the rapid radiation and the great distance from the sea, the interior becomes extremely cold. The air over it becomes very dense and high pressure develops over the Mongolian and Manchurian Areas. Throughout the season, air from the upper atmosphere is descending. Thus air is pressed outwards from the high pressure, pentre, So there is a general movement of wind from the interior towards the coaan, where

pressure in relatively lower. This is known AR the winter monmoon. Outblowing or offshore⠀⠀ winds do not bring much rain sinos they haven very little opportunity for picking up moisture, except on their way to Japan, Caylon, South India, and certain parts of South-osat Anim

In summer, because of the rapid heating of the land and the great distanes from the sea, air over the continent becomes very hot, expands and rises. The interior experiences high temperatures; an area of low pressure is: formed extending over the whole of the

continent with the lowest pressure in Puujao. This causes an inflow of air from the

e urrounding area of higher pressure ž.8, ITOM the sea. This is termed the summer monsoon, The onshore or inblowing winda are ware and moist, thus they bring rain, sometimes very heavy, rain to most parts of the continents.

This seasonal change of wind and main produces what is generally called a seasonsl or monsoonal climate. The interior of the continent, while having large seasonal range of temperature, has continental climate,

(II) RELIEF BARRIERS

There are high mountain ranges extending throughout the width of the continent. Together with the effect of the great distanos from the sea, large areas of the interior of Asia hava very low rainfall. The Himalayas in an very effective climatio barrier. In summer, at causes heavy rainfall, on its southern slopes and keepa Tibeż dry. In winter it prevents the cold air from enter- ing India. As a result, winter temperatures at Caloutta are considerably higher than that of Hong Kong though the two places are loosted not far apart in terms of latitude, Similarly, the Tainling Range in. China divides that nation into a cool, dry northern sector, and a wara, moist southera Neotor. These relief barriers are also the causa, of uneven distribution of rainfall; even within the monsoon lands, because- the windward slopes of the mountains (racsive heavy rainfall while the leaward slopes are comparatively drier..

(III) OCEAN CURRENTS

Ocean currente exercise influence upon the climate of a coastal area by first warming or cooling the winds that blow over it. Therefore, they are affective modifiers only when the winds are on-shore, For example, the, warm Kuro Shio current which arrives at the Japanese coaste from the south does not raise the winter temperature of eastern Japan' though it has a slight warming effect on the western coast where the N.W. monsoon winds

are on-shore. The warming effect of the KürO Shio is, however, felt in summer when the S.E. monsoon winds are on-shore, This enables the” prevailing winds to pick up moisture more easily and in turn given haavy rain to the

273

364

(7): 283°K > −223°C

~期星日十三月三年〇七九一座公年九十五國民中

south-eastern part of Japan. Similarly, the

cola Okhotsk current lowers the temperature of the air mass paening over it and consequently lowers the temperature at the `consts of Hokkaido. mimics

(IV) THE OPEK NATURE OF THE SIROPEAN MARGIN

The Baltic Sea has greater effect is summer when the low pressure of Central Asia allows depressions to cross the continent through this inlet. This accounts for the Busser rainfall across the western Siberian ∙Plain,

In winter the Mediterranean Seg has greater effect because Atlantic depressions, taking a more southerly route may pass right through the Hediterranean Sea and bring rain to an area extending from Anatolia, Syria, Ismael to Caspian Sea.

WINTER

SUMMER

H-HIGH PRESSURE L➡ LOW PRESSURE Account for the distribution or population in Monsoon. Astai

Asia is the continent with the greatest population, and its total is estimated to ba 1,850 million. The population in izin is linken both with the actual density and with the uneven; distribution. In Asia, a large part of it is very thinly peopled because a large part of the huge population is concentrated in the river valleys and coastal plains and on sous islande.

The uneven distribution of population i due to the following faptores-

(8) RELIEF!– A major part of asia in consisted of

young fold mountain ranges or plateaux which are at a considerable distance from the seaï Buch areas are inaccessible, infertile and

a result, such areas are sparsely populated unless there are zich minera TOROUT COS.

* Bally experienced extreme olimatic conditions:

(b) CLIMATES→ In the Manchurian and the Siberian regions, one can find some of the world's largest piece of lowland but the population density in these regions is very low owing 1. the unfavourable climate. In places such as the Siberian Lowland, the sub-soil as frozen for most part of the year and it is impossible to Carry out any agricultural activity in such hostile conditions. In the equatorial belt, the climate is too hot or too we

wet to allow high density of population to exist. Therefore the highest population density is recorded áð the sub-tropical and temporate belt where favourable olimatic conditions allow dense population concentration.

(6) SOIL CONDITIONS «– The sub-sail in the north

is frozen throughout the year and cannot s support the growth of long-rooted plants. The Laeas in the Loess Platenú in North China is poreum and allows the penetration of water readily. The ancient platforas or plateau," areas in South China and parts of South-East isis have only a thin cover of soil. It is only in the delta dzean of the large Tivers that a rish and thick soil can be found. With the exosption of Java which is endowed with rich basis volcanic soil, other tropical islande § Asin are little inhabited because of the presanos of swamps'.

Gezerally speaking, the sautern part of Asin in densely peopled while areas such as Sinklang, Tibst, Kongolia and Eastern Sumatra, Borneo, Interior Barma are examples with sparse population. These areas, however, provide grounds for future population expansion in Monsoon, AHÉR.

Questions for next weeks➡*

A)(1) Why is irrigation necessary in India and

Fakistan?

(11) What are the methods of irrigation used ir

these ocustriss?:

(iii) Briefly describe how irrigation has improved

the agriculture in the Indus Basin.

Explain briefly why progress in industrial

development is generally slow in India.

60x1

756 × 2

X=1072

一屆

(8)/道爾敦分壓定律:

共羲耳定律)

(4) Pi= 760mm

V1 =0.744

(=)(1) 9.若溫度不變設其壓力應為

750 x V = P x z V p=375 (mm)) 若歴力不數被共温度應義 288/V=7/2

(2)解壓力變為

742 x V

288

(3) LINTPÉE 1412. 24/

76

303 a

=7828(mm)

756mm 3

273

291

18°C,756mm時10升重w克

1.072·009=10:W W=0,84(2)

B=160##- 20.9 mm.

72 = 296 K

23°C時之飽和水蒸氣壓為20.9mm)

760× 0.74

296

7381* Va 296

·V2= 0,761 (4)

P=752mm-9.8mm A

= 742-280

3993 mly 7=284 K JA22 × 392.3.

760mm

= 375 (m!