1967-12-30 — Page 11

育華夏三張三

日九廿月一十年未丁麼复

WAH KIU YAT PO

1968-

方試題領習書調

化科——————— (

九

)

●林錫衡®®

複習題九

複習項目

普通化學名詞(三)

(1)理想氣体

工解釋下列名詞

(2)氣体克分子容積

(3)可逆反應

(4)化學平衡

(5)電離作用

(6)水解作用

ᄑ比較

(1)物理變化與化學變化

(2)金屬與非金屬

自费月二十甲七六九一曆公平六十五國民中

何擔

天利玄

A

登封找六,

獨樂樂不如衆樂樂

聖校

有誕

二十八名 有吃有玩 歡渡佳節 會 舉辦聖誕遊藝大會,招待貧童二百

· 何東女職校及維多利亞工校天主教同學

會亞 何佩题

日兩個多月,與殺多,何東女子雕美學」。

梯

期一

不足的小節物,應

表明目·養

土∶戰饽學校小五班學生 學會會作多次商討 共有三十人,是何時,於 俄案女子職梁學 高思食遊替大會,應性實貨都出席參加,著踏入阿東女子娘讓一個心肌苋轲上做

友品

久百

高校強堂,區分攤一杯開一次,在該校 藝大會,招待貧童。大可。

論

歡鐵

六珊海

的對

工美學以中六班學生會就某一套電影的主廚與會,大坑街訪國

【于職業學校中五瘘學 璟,有時是對舘爾年中的二百二十八名貧路,無拘無東地產市

下表一幼的完固

盎疎菇們面·情·游换成記各聲、 開到

下莲 好多成 然械的個到的所在囘 依一散

一可跟男心的热爱整家 不位有個 良方類以外女和,腐到佩。指小堂

大會 席强致前。上有何東女子造漢學校天主教同學

複習題八解答

1968

工.(1)當量

英文中學會考試題預習專欄 地理科 (九)

劉玉領

Geography (9)

(2)原子

(3)原子

(7) +3

3:8

(2x)+X+4(-2)=0)

( 2x1 +2X + 7(+2)=0)

(8) 146 (24

281812×19 16+6=146)

(9) 0.25 ( 6/24)

0.2×24)

(10) 0.5 當量=原子量+原子價

2.4

=2422

6克相當水

(0.2×12)

(11) 0.05 ( 7.3/146)

230

(12) CH

CH

|ᄑ(1)飽和溶液:

51146)

克當量)

OH

在一定溫度下一定量的溶劑柢能溶 解一定限度的溶,溶液中所含溶質 已違此一定限度則此溶液崧飽和溶 液例如在40°C時,00克水只能溶解 37.5克食鹽若在此温度下投40克食 接入 100克水中就會有2.5克食鹽不能 溶解而沉積於底部而其上之溶液便 是食蜜的飽和溶液,

(2)中和作用:

適量的酸與鹽基作用而成盐奥水中 和後之溶液並非一定是中性要視所 成的菌之水解結果。

例如:

NAOR & CH2 COON

塩基

酸 若以40克氫氧化鈉560克醋酸作用 能成為82克醋酸鈉與18克水這作用 便稱中和作用,但結果溶液帶鹼性而 非中性。

(3)中性元素:

元素之能導電與導熱並有金屬光澤 但其化學性質又近平非金屬者,例 如碲鍺及砷等是

(9)過渡性元素,

週期表中III88 v8.18w 及 TB族元素其原子之最外層電子為 /或乙個次外層電子自8 至18個不 等這些元素有多種原子惯易成複離 子,有附磁性其化合物多有颜色稱為

錳,铁钴等是, 過渡元素,例如 (5)同位素,

原子序相等質量数不等的幾種單質 在週期表中佔同一位置稱同位素同 位素原子中質子數目電子數目皆相 等但中子數目不等,例如氘氘氚是 氮的同位素三者原子序皆1質量数 则分别是1元,3,質子電子数皆流! 中子数分别是 0 / 2,

14. (a) -Draw a large sketen map of the Indo-Gangetic

Plain. Un it, label

(1) Indus Sutlej, Juna, Ganges, ana put.ra. (11) Himalayas, Sulaiman, rayan Vindys (Li) Botan Pass, Darjeeling Rass, Khyber tab.: (1) Calcutta, Dacea, Allahabady Jamshedpuri

Khyber Pass.

3. Darjeeling Pass

1 Bolan Pass-

De Jht, Lahore, Peshawar, Karachi.

andbaus mer?

Lahore

Himalayas

Ganged

Allahabad

·Calcutte

Brahma

Pacca

Vindhyt

Indo-Gangetic Plain

ho tapuisine ut

3 by digging long

underground tunelis called ierex which lead co the ground water at the foot of hills and bring the water out onto the alluvial plains. This is practised in Baluchistan.

A few tanks can be located in the tower Ganges Valley where mud walls are built across the valleys of small streams to form shallow. storage: ponds or r 'tanks' so that water from the monsoon rain is held up and stored. The. water is utilised at the close of the rainy season but in the hot season when water is most needed, the tanics dry up completely, This method is not so important in the Plain as in; Peninsular India.

Irrigation is necessary here for any one ow any combination of these reasons ::

Firstly, rainfall is not evenly distributed. throughout the year and there are eight dry months ainually. In an area which depends so heavily on the start of monsoon winds for its : heavy rains, water has to be stored in the rainy

Season before it can run to waste, to be used later in the year before the next wet monsoon arrives.

Secondly, Large areas surfer from a natural deficiency of moisture. The Indus Valley has less than 20 inches per annum. Such an amount of Lainfall is inadequate for agriculture. In these Dermanently dry areas, water has to be brought

ay canals from where it is plentiful in order carry out permanent cultivation.

Thirdly, the variability of rainfall ranks 港話器 high as 30% in a large part of the Punjab.

Plain and the lower Indus Valley. This figure" implies that rainfall is uncertain and may fall completely in certain years. To insure against drought, farmers endeavour to irrigate their fields.

LIBRAR

(b) What are the chief methods of irrigation in chia

plain? Why is irrigation necessary here?

Three methods of irrigation can be Histinguished in this region canal, well, and

ank.

There are two types of canar proviaes Irrigation, namely, inundation canals and perennial canals, Perennial canal provides irrigation water all the year round. This is the most important type of irrigation in which watc "dammed back and thus stored in a Luke is distric- uted by a network of canals and ditches. The flow of water: can be regulated according to the need of the season. There must be a river of nonsider- "able aize feeding the artificial lake and adequate

capital for dem construction. The: inost Important works are the Sukker Dam on the Lower Indus and the Sutlej Scheme In Punjab. The older form of canal irrigation are the inundation canale which take their water from the rivers in the flood. season only. They are flood or overflow cana 1s aut parallel to the rivers. The disadvantages they suffer are that they cannot take all the flood water in the wet season and dry up. in: the hot season: In the past they have been very important, especially in the Sind Area, but they have been replaced by perennial canala.

Underground water, 19 available mainly in

regions lying at the foot of mountains and plateaux. Wella may be sunk into the saturated rocks below the water-table. The supply of water from such wells 19 usually perennial but the construction of wells is expensive and involves much labour, These are an important aource of water in the Upper Ganges Basin. Another methog

(c) Taculate, in note form, the geographicut)

differences between beat Pakistan and Bast Pakistan,

East Pakistan

Helief Largely a practically.

flat region consisting of the Brahmaputra- Ganges Delta, the broad flat Sylhet Valley, and the Chittagong Hill Tracts

Climate A very wet country,

80" p..

Agriculture

Tropical crops: race tute, tea and sugar-

frequent. necessary

Population Density 55,000 sq. miles Average density. 900/sq. mile

Mineral Wealth

West Pakistan

A more complex config- urstion including the dry platean of Baluchistan, the hilly North-- Western. Frontter Province, the 3ind, the broad, dry alluvial plain of west Punjab.

A dry region, onder 20" pia.

(Dry-zone crops: wheat,

millet, maize & cotton.

Irrigation essential More than of the cultivated land" |irrigated.

309,000 sq. milea Average density

10/sq mile

Very poor in miners s Fair mineral resources:

except natural gas

Jute is the major export item. Chittagong is its chief port.

Questione for next week.

oil salt natural gan and some chromite Great H.E.F.potent la ls.

Raw cotton 19 "sent

oversesa through- Karachi

16. Make a comparison between the Delta Region and the

Dry Zone of Burma.

17. Define the term hinterland'. Delimit the

hinterland of Penang and that of Singapore on a sketch map of Malaya. Then briefly account for the growth of each of these ports..