1973-05-03 — Page 23

育教僑華頁三第張六第日一初月四年丑癸歷夏

se

的藥

化學科

WAH KIU YAT PO

報日僑茶

四期星

日三月五年三七九一歷公年二十六國民華中

B. C2H4

c. coc

unsaturated hydrccarbori.

Ethylene; because it contains "a higher percentage of carbor

There is no difference;

because they are both hydro- carbons.

An unsaturated organic compo

is characterized by one of the following reactions.

照菇勿蛋懷

A

(廿八)美

C.

produced by condensation between

hexamethylene diamine, H2N(CH2)6

NH2 and adipic acid, 1100C(CH)

COOH.

After a simple first-stage. combination to nylon salt,

HOOC(CH2) COOH + HẠN(CH2) NH

HCOO(CH) CORH(CHy)@IHz + H2O

heating under pressure produces furuner "polymerisation", farely condensation because water is split out to give a linearm superpolymer of the type:

...CO(CH2)CONH(CH) NHCO (CH,

CONH(CH) TH

This superpolymer is zylon 66.

Exercise

Part

1. Which of the two gases, ethene (C2Hg) or ethylene(CH). burns with a luminous and smoky flame?

Ethane; because it is:à saturated hydrocarbon:

Ethane, because it contains

a. lower percentage of carbon Ethylene; because it isar

1978

DE

substitution

B. addition

esterification.

D. hydrogenation

E. dehydration.

The conditions required for the preparation of ethylene from ethyl alcohol and concent. rated sulphuric acid are

T. Ethyl alcohol in excess II. Concentrated sulphurie

acid in excess

III: Heated to 14500.

IV. Heated to 18000.

A. I & III-

B. I & IV 3.

G. II & III

D. II & TV

E. I, IT & TV

When equal volumes of ethane and chlorine are mixed in ultra-violet light the organ product is

A. pure ethyl chloride B. mainly ethyl chloride C. pure ethylene dichloride. D. mainly ethylene dichloride E. mainly hexachloroethane.

An organic compound does not decolour (se promine water and has no effect on acid potassi permangariate solution. .It

be

()答:C.40歐姆

網設P表電功率,V表電流之電位差

尺表電阻,

中文中學會考試題預習專欄

40歐姆

物理科(廿五)

宋泰初

(六)下面圖示電橋三種電路中呈現

平衡的是:(六)答: B.祗有工及工。

測驗八解答

760

時間:式小時

120

Ca

·8.0

甲(40%)

5

工選擇題(共20%,答案式分 (一)下列各圈的平衡狀態属

(二)答:三

圖一

稳定

不稳

n

圖三:

稳定

(二)如下圖,X及Y為完全相同之兩彈簧 秤,質量如下圖所示;物體重為600 克,則X及Y之讀數應為:

(-)-A6405

(七)在下列三種鏡中單獨使用時,對控

實物造成虚像的是

(七)答:EIII及亚。

III凸镜 工平面鏡

T凹透鏡 (解]工,因平面镜所成三像必在藐後,圾 非實際光線所成立像,是為虚像.

1.因凸镜將光線發散,而將光線反向 延長聚於鏡後,故所成立像為虛像。

III国凹透镜爲發射透镜,所成立像為光

(八)如下圖,凹镜造成:针像與针同在一

位置,此凹镜$焦距為:

(八)答:A、10厘米

600

眼無

像

W = 40g (14) X=111# Wy+W

Wy=

故為40克+600克=640克

Y3懸重為1=600克≤

(三)若一簡單機械之機 械效率為0.12,则

(三)答:B.該機械输出 功為輸入之功的0.12倍

解因為: 機械效率=

W=600g)

輸入之功 輸出之功

一下因為一磁棒置指與地磁子午線:

平行之位置時所得之磁力線圖.

(四)答:D,祇有工及正確 I.磁棒靠近X之一端為其

南極。

此磁場中和點之联線 舆東西方向平行。 (五)有一電功率為1仟至:電熨斗,用於200

伏特之電路中,其電阻為:

凹镜

觸因物體與像在同.

一位置上,故物體 之位置必在凹镜的 球心上!

埝:5=R

5為焦距,尺為球心。即R.

故f=2x200m

•Car = 10 cm

(九)相同的一组單位是

(九)號:C.比重,比热

200m

(解)因比重及比热的單位皆為1.

(+)在測定空氣中的聲達時影響後

结果的因素是:

(4)签: A.當時的氣温。 秒在1738年,法國科學院 Académic. des devantis 測定聲音了速度,並打1832 年再測將其修正,得聲波在0°C空氣中 傳播,其速度為331.3米/秒;或1,0875/5 若温度改变,凡温度升降1°C則速度约

未下期续

Solid sodium propionate is heated with a mixture of

calcium hydroxide and sodium hydroxide: Which statements

are correct?

I. The product:

nethane:.

mainly

II. The product is mainly

ethene..

III. The product is pure propane

IV. The reaction can be: named

decarboxylation,

TT only w

Q. 1, III only

R. II, ITI only

S. TI, IV only

TWII only

Which statements are correc concerning: ethylene?

It is made in large quanti ties. by hydrogenating acetylene

II. It can be made in the

IV.

laboratory by dehydrating ethanol

Refluxing iōdoethane with aqueous sodium hydroxide gives ethylene:

It can be polymerised. It combines readily with bromine.

1, II only

V only

RII IV only. 5. III, IV only

II, IV, V only

Isomers.

have the same physical but. different chemical properti

1978

中文中學會考試題預習專欄 化學科 (廿五) 未泰初

測驗八解答

時間:二小時

甲部(全答)(共60%)

工選擇題(每題查(共10%) (一)對化學反應速度影響最少的因素 显:(一)答:E(反應物的顏色)

(二)質量作用定律是:(二)答:A.(化學反應 的速度與參加反應各物質的濃度成正

(三)週期表每行的同族元素所不能表示的 事项。 (三)答:E(回族者同為金属或非金 屬

「氧化」的正確及最佳的解釋

(回答:A.氧或其他页電性元素增加,或 氢或其他正電性元素增加。

(五)某元素之電子排列是238852.故元 素應属:(三)答:A.(鹼土金属)..

(六)漂白粉能起漂白作用,因為它能分解出:

(六)答新生態氧) B

(七)菜混合物含鈣及鎂離子,在焰色反應. 中此混合物會產生火焰的颜色是 (七)答: D.(磚)

()通硫化氢入下列各離子酸性溶液

中而不產生沉澱者是

(八)答:A. (Zn2+)

1972年中改中學會考試題 (九)下列各化學反應中,元素X3化合物

被還原者是

(九)答:D

(X1 (50) + 3Pb (NO2) →→→2X (NO2) +3Pb50] (4)在下圖中,指出其裝置或藥品全 部错誤點

凡疏化亞鐵

正

(4)答:C硫化亚铁

放置的位置錯誤!

漏斗的型式 不合

洗茶用龍頭

Q.. vary in both physical and

chemical properties.

R. have different molecular

·weights

S. differ only in their boiling

points

always have the same chemica. but different physical properties

"Nylon is best described as P. a polymeric hydrocarbon Q. a refined natural fibre Ra protein::

5. condensation product

an organic polyester

Which of the following quanti-

ties as the number of carbon atoms per molecule of a straight:chain alkane

increased?

. Molecular weight.

Q. Specific gravity.

R. Vapour: pressure.

. Boiling point

Vapour density:

Part II

A gaseous organic compound:: was found to contain 85.72% carbon and 14.28% of hydrogen weight. :(i) Calculate the empiricel

formula of X from the above data.

Suggest a structural formulɛ and name for X, if its vapour density was 21: (iii) Calculate the volume of oxygen required to burn completely 10 c.c. of X (iv) How does this compound:

react:with:

(a) Hydrogen:

(b) Chlorine

(c) Hydrogen Chloride

(d) Concentrated sulphirie

acid.

1.填-

题(每答案或分(共50分) (土)將H2S通入下列金属的塩類中,即有顏

色的沈澱生成;試寫出其檢燕的結果。

:沈澱的顏色

溶液的性質

(1)中性

黑(滾於硫酸)-

2中性——黑或橙

3中性——深棕色;有光澤

(4)酸性鹼 -蒸乾沈澱後成: 性及中性淡紅色粉末,吸水後 皆能漆味成無色結晶 沈澱

(5)鹼性若 為中性則 此沈澱能

·微微溶解。 (6) 酸性、鹼 性及中性皆

(7)鹼性及

中性

(8)中性

-淡灰色;蒸乾溶 液後成立方形立固 体。

一蒸乾渚液後得

红色結晶。

(1)亚铜哈

亞镯慈

3亚铁茗

4).銅鹽

(6)鉀裝

-黑色或银灰色。一()鉛监

黑色:沈澱能

溶於濃硫酸及酸(8)銀盤

(9)銅盤 (10)酸性一黄色;沈澱能溶水。

(9)酸性-綠色或灰色;能溶於

水

(1)中性—黑棕色;沈澱能溶於

硝酸

(19) 3

(1)秘蓝

(三)指示出下列六種化合物何者為氧化 劑?何者為還原劑?并用方程式表示其 反應。(答案1%,程式3%,即每题40 (12) H250, §£ **, 方程式: 2H250+02 還原 (13) H25&

方程式: 2H25+02

→2H2504

72420 +51.

氧化 方程式:Cl2 + H2O → Hd + HO (15) KMio是氧化

劑(中性溶液

入程式:4KMnO4+H0→400H+4

(16) HNO3(濃)是氧化

方程式: 4HNO3+C→ 2H2O +4NO2+CO2

劑。

(17) CO & I k

方程式:

CuO + co

(三)馬口铁是拿上((3)的铁片;水银的合金

称為(19)

(0) $2

(1)汞齊

——————甲部解答客,乙部下期一