頁二張四鱨
日二十月三年巴乙层复
WAH KIU YAT PO
第二台:四月廿三日下午五時半至六時 第一台:四月廿七日上午八時半至九時
1.4634022
一九六
一
題預習專欄
香港商業廣播電台 升中指導英文科第卅七課
化學科
播出時間
(+) 王錦釗・
•
CHEMISTY (20)
·
58.20
vaention 1
4
64+32+16x4+18x5
- 250
Cuso
- 150
64+32+16x4/
Original weight of mixture
Weight_of_residue after prolonged gently heating
2 Lons of weight
1.50 g.
- 1.05 gm. 0.35 gm.
[Loss of weight when 250 gm, of Cu30,.5H20 are gently heating.
* Weight of Cu50.50 in mixture
Bence of CuS0.50 in mixture »
+
and % of aand in mixture
(b),
CaCO BING
- 90 gm..
0.45
* 250 gm. 90
1.25 ga,
1.25
* 100%
1.50
/38
168/32
40+12+16x3] 211-14-16x3}
100
* 126
weight of Cace, dissolved, Weight_of_ UNO, required
Ca(NO3)2
r. 2.50 g,"
- 2.50
- 3.15 g.
Volume of gilate acid used]
[Concentration_of_the bench dilute ac10
100
125 gm♫
- 25 al.)
4000
95
23.15 gm. par litre
126 gm, per litre
question ?
in a bisst zu KILA DÉ a reducing agent" at a high' temperature is used to remove the oxygen from the, trop oral the main ore being haematite, Fe,0,. The charge of iron orel choke and limestone is tipped into the furnace at intervals andhot air is blown in at the bottom through tuyaran, The "Temperature just above the tuyères-ranchas a temperature
ät Fenst 1500 C. The temperature is obtained by burning de les toycarbon dioxide.
co
The carbon dioxide rises up the furnace and 1
the hot coke to carbon monoxide,
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#
已佔第二位 出洋留發數字年多一年 留美遠東學生數宇中 香港
經費亦欠-
裕 港大寇比教授批評港大設備與科系不足
衆名投恶本港兩簡大人,今年有鎖會 大學學位顯然不壞,等等均尙製立此穠 學的學生,爲數近八 進入大學染,將同時躁方面亦務,形使大青年 大批學生在英國留學 足够之書籍或地方以 千人,筒按照去年兩 僅佔ㄨ生百分之十三 許多近代實用课際 海外留學,做成人,計香港有三下一百 從事學習。圖安全預
一千一百餘䒑径上,,安告,研發,來有:湘大的學生沒有 收件
KABELKI46İN - KEO •
「保險金融,商 藝術,材外流現象。
四十三名,中華民國 只有三千四百元,地域
二千一百零八名醫生 餞別會中,就有前港 苦和研究,非律賓有 比激揚,日前在一次 本版昨晚 大情况評論所
本年度投考港大中大
入選人數百分十四
西學年,在美湖求學 他國家居作的中國學 。 | 香己佔第二位了。 二千三百五十三名。 洲語文的今日,港大 的姿瓦學生數字中, 生與科學美國的,共 在洲多敦授正 【教育協會」的電報所 大韓民國有二千四百 灬具,亦無貨項以研 戰,一九六三——* 一十名。此外,在其 究太液的許多經濟問 番爆美粱「國際 有三千零五十七子:'朝偉有租用之計數被
出:
百二十名學生和一干 將返國 有的 年度,日本有三千二學的設備不足,實行推。
一百名學者在美國讀 港大學經濟系主任法
22~~某人的薪金,先增加20%,欲浓15%,問他實在加薪機貼
(73)某校招生,取錄720人,甲乙等人數的比是213 乙丙等人數的比是625,乙
丙三鹕人數各有多少?
(74)甲每9天到公園一次,乙6天一次,丙每8天一次,今天三人同 在公園相遇,問望少
要酒天,三人又在公園相遇?
(5)官正方形地,面積144方里,今欲郵地潤,其比例尺需2吋1,求此地圖的風
#?
(76)一條路的南共124 株,帶兩株的距離8呎 求路長雙碼發明?求下面圓形的面
200
Theˇcaruon monoxine-an-vormed "is"tlie-reducing agent,
which reduces the ore to iron in the upper
The neither temperaturevancia the region of
of the furnace
The coke serves a dual purpose; it servea an
ki vell as a reducing agent. The iron collects in a molten state and 10 tapped off at intervÄIN./
The function of the Limestone is to remove earthy; impurities that are prescut in the ore aud which would
herwise clog up the furnace. The linestone in first de- composed into quickline, calcium oxide, and carbon dioxide]]
Cao
Co
The quicklime" and the sapurity which is mainly cand combine to form a molten slag which stays on top of the molten Iron and which is also tapped off at intravals,
Cao
CAS183
Calcium silicate.
The bot air blown into the furnace is-heated by vaste gases which pass out of the furnace. The use of hot air brings" about a saving in foel, for air at the normal atmosphèria <temperaturen would have a considerable Cooling effect which would Chave to be compensated for by using extra fuel..
The iron which is obtained from the blast furnace known as cast iron, and contains 4 to 5 percent and various other impurities which make the iron brittle,
(*) When ferrous sulphate crystals are heated alone, vater
st ogystallisation de first lost.
On further heating, the anhydrous salt decomposes giving
dioxide and sulphur trioxide and leaving a red
Whe
ous sulphate crystals are warmed" with concentrated
d, the ferrous salt fe oxidised to the ferries
(1)36+ 4 × 9-45+20+ 4+ 5-? (2)17× 9-7 x 178 x 17-? (8) 65x65
(4) 13332 + 11
(5)2327717RE
- ( 6 ) 4×5 −5 × 5+9x ·
(7469+2244
(8)13+8x56
C948 108 14485H.C.F.
(10) 236 — ? 7.
(11) 18365429H.C.F. (12) 5.4担之0.是多少
1
3
(13) 05 x tai nạn 2 4. (14) 24:35 429 Ľ.C.M. (15) 640元的5%是多少:
·兼下列各耀的未知數(16號19)
24
-6
(17) 35)-7: 2
(18)
184 +18
(19) (20)--0.8x
(21) 3.2x0.18
(22)5哩的一半的一
8
(23)5:5呎+0.75機
把下列各數化爲最細分數(2427)
(243 0.05
(25) 4.375
(26)32.5%
(27) 3,596 +1.12
28至30選馬小數
136232304
|(29)
125 (30)10尺5分的尺 (31) 32.57R+ 141 (32)榖60乘0.3小時:
3 61.
8
4
9
(39)
7
2
12 3
(34)
(35)正方形的周界层6尺
(3)茶數加一
(37):2 去與某數得8–京某數•
(39).32.7 x 2.40,02
(39) 0.012 MARS? (40)
644 AMERE
(1)右列那個數將大;
(42)魚肉每斤2.4元,買魚肉12吨,転5元紙點一張,跟找四多少?
8 3
100 1
14 083 21 (44)長方體小是4吋,瀾7吋,高9吋,求體到?
(45)一後方體,長2尺,個3一尺,其後續念42一立方尺?京高酸
(46)11先令9個士之一與10先令之一之是多少?
(47)英酵1) 港幣16,港幣224元合英幣多少? (48)解一元一港幣5.9元,美幣26.5本合港幣多少? (49) 0,65 » 0.063 0.006268»
(50)地一塊,丁方.6一平方嫌它的满国志多少?
《汽車的旅琚》
2to
18+
150
120
下圖AB的全赭代表汽車所行的運數試囘答下列問題
#2
(79)上午8時至下午12時汽車午的時邂多少?
(80)汽車在甚麼時候停止前進?停止了多少時間?
(81)下午1時30分至5時30分的平均時速比上午8時至12時的平均時油快多的
(82)下午由一時代起至八時半到建終點止車行共多少哩?
(88)汽車由開出至到線終點止共需幾小時幾分鐘?(除中途停止時間)
..咁預習一答案
(1)4144
(-2):3595
C546
(8)2
(3)8514
700
C4,35
(9)213
(10):566
(8) 0.18
(12) 32:
(13):40
(17) 451
1 (10)-
14 (18) 12
(18) 1
(19) 7
MA
ZUNO.
NO
* 2N0,
(c) When a solution of aedium hydroxide is added to m
solution at farrous aúti
(51)赠一本以九折出售,得歛4,95元,問原價是多少? (52)甲每分鐘打字125個,乙條分確能打201個,求甲打字的速率是乙的百分之飛? (53)李果8打,吃了48個,懷了25%,雄餘幾個?
of ferrous hydrox
"a"green gelatinous precí
is obtained, F@(OH) |
(54)汽娅部小時行12里,開行3小時,凡行了全密的一,間全聯多少?
9
(21) 112
(25) 97
(29) 1.7
(39) 2
(37) 78
(22) 107 M
(26) 80 160
(34) 12
(16),124
(20) 110
(23)16 (24) 3207
(28) 1 (27) 5
2 (31)-
(35) 120.
(99) 23
(32)
11
(36-) 907
437
(40)
250
(55)农物一批定價260元,以九折出售,遞可燾17%,問原價多少元8
(56)承上題若賣價是216元,求矱
($?)承上題若要賺25%,求變價?兩
green preclufata rapidly turna Drowu on exposure
to ferric hydroxide.
Questions for next week:
1. Starting with a piece ofhead, how would you proceed to
prepare (*) Liviarge, (b) red lead?
How and under what conditions do these oxides react
c) concentrated hydrochloric acid, {{d} carbon ́s
88
Dilate hydrochloric acid as added to a solution of lead nitrate and flie resultant mixture is pluted, boiled, and then evoled, Describe and explain what takes place.
How would you extract one constituent ium faxely, pure")
ion from each of the following mixtures couda
sted uitric acid and conecatrated sulphuric. seld carbon dioxide and carbon munozidei
(58)某轡店有碰4000本,實去2920本,鋰未貨的是全部的百分之幾? (59)一件工程30人做,6日可成,如果成少10人,發日可成? (60)本金1500元,年利962年4個月的本利和是多少? (61)用有銀60.8元,乙有線82.4元,乙哈甲起元則附人所有相继?警 (62)平行四集形的面積是60方吋,寯时,求它的真是辣眠?
(3)本輪直徑2.5呎,轉9大前進有花?(三屬中~
22
(4)泗精一瓶含水5%,若境加水25,問酒精內共含水麵%;
(65)新鄰今年14嵗,恰是母親的——五年後冊無癭歲?
(66)七時至八時之間,陶針成直錢是什麼時間? (67)每日走7小時,每小時走8型15米可到的路绳,若改需每日6小時褟小時是10里,我
(68)蕊速長14时的正方形比直徑14时圆形的面後大多少? (69)把一根12尺的竹竿,掃進水真,一無出永固,其餘的一在泥賽,那末水深多少?
(70)一木船,上行時速6一起,下行|小時共行86一哩,問水流速楚
(58). 180.
(61)10先会5厘士(52)28
(65)用40哩,乙34哩(68)40(美元)
19 (69) 25500 50
41. (73) 125
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(74) 5177
(78) 2-
(63) #14.26,797, (64) 2305
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(69) 26000
·传得90005
(67) 526
(71) 30
(75) 192 A
(72) 4878
(76) 64
(79)7方尺 7一方时(80) 420款:
(41)
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150
(42) 1.658
(43) 0.32
(44) 0.2225
€45-) 0.3305
(49) 176 R
(53) 7050
(46)
(50) 105
(54) 20
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