1970-12-23 — Page 26

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三期星日三廿月二十年〇七九一曆公年九十五國民華中 育教僑華

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聖伯多祿中學畢業

對假日辦後,帶落迂俗的精神上图,那便命反、假期而洪知晏榮了。(成).

•攝軍功課,隨作出一個作息有度的,對方以利用這些日子含運費作的錯,如灭灭只姆兹玩耍迢,迷 一根子們先縠斯當中,路好識 好好地利用,除怍有益身心的活動外,勿以爲假期如可完全,

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有满变外,並呼籲木尚得,有的两配, KAUNEDUCERS TEES

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CHEMISTRY

LESSON NINE

23-12-1970

ANSWERS TO EXERCISE 7

(61) C (62) € (63) E

(64)

(68) P (69)

(70)

(05) B (66) T

(71) B (72) -0

們造化藝街臨,陳

A

(74) A Note: (66)

because the density of gas C

is unknown.

花的

EXERCISE 8

(75) (a) Water (b) Sulphuric acid (c) Hydrochloric acid

(d) carbonic acid (e) nitric acid), ADA

Which of the above are strong electrolytes?

A. (a), (b) and (c)...

B. (b), (c) and (d)

C. (b); (c) and (e)

D. (c), (d) and (e)

E{a}; (c) and (e)

(76) (a) Sodium hydroxide. (b) Acetic acid⠀⠀⠀ fc) Ammonium hydro

xide (d) Sugar (e) Carbonic acid

Which of the above are weak electrolytes?

P. (a), (b) and (c)

Q. (b), (c) and (d)

R_fc) (d) and (e)

S. (a), (c) and (d)

T. (b); {c} and (e)·

(77) (a) Alcohol (b) Benzene (c) Acetic acid (d) Most organic

compounds (e) most salts

Which of the above are non-electrolytes?

P: (a), (b) and (c) R (b), (c) and (d).

0. (a), (b) and (d) S. (c), (d) and (e)

(b)(d) and (e)

(78) The electrochemical equivalent of an element is the weight of the

element liberated

P by 1 ampere 0. by 1 coulomb (R) during electrolysis by 1 coulomb S. after electrolysis by 1 coulomb Tby 1 Faraday.

(79) One

One Faraday of electricity is the quantity required to liberato

P. during electrolysis 1 gm of an element

¤. during electrolysis 1 gm equivalent

R. during electrolysis 1 gm equivalent of an elemen

S. during electrolysis 2 gm-equivalent of an element

1. during electrolysis 2 gm of an element

(80) An acid is a compound which, when dissolved in water

P. forms hydrogen ions only.

Q. forms hydrogen ions as the only negatively charged lons Rforms hydrogen ions as the only ions

S. forms hydrogen ions as the only positively charged cons T. forms oxygen ions as the only positively charged ons

(81) (a) By disdiplacing a volatile acid by a less volatile one

(b) By the action of water on an acid anhydride

(c) By electrolysis

(d) By synthesis

Which of the above can he used as preparation of ac

(a), (b) and (c) ·B (a) (b) and (d) Cb) (cand

D" (a) fel and (d) E (a) and (b)

(82) A salt is defined as the substance formed when either aus

part of the ionizable hydrogen of an acid is

A.

replaced by a metallic 1on.

B. replaced by a non-metallic ion

replaced by any other jon

D. replaced by oxygen only E replaced by hydrogen only

(83) (a) Potassium bisulphate. (b) Sodium carbonate

sulphite (d) Sodium bisulphite:

Which of the above are normal salts?

(ct. Sodium

A. (a) and (b). B (a) and (e) C (a) and (d} [[d] E, (a), (b) and (c)

O. (bl and

84) (a) Sodium carbonate (b) Calcium carbonate (c). Calcium

bicarbonate (d) Sodium bicarbonate

Which of the above are acid salts?

A

and (b) only

(c) and (d)

B (al and (c) E. (a) and (d}

C (L) and (c)

(85) Neutralization is the combination of the oxide or hydroxyle

sons of a base with

A. the hydrogen ions only

8. the hydrogen ions of an acid only..

the hydrogen ions of an acid to form water

D

IR6) a;

the hydrogen ions of an acid to form a salt

the hydrogen ions of an acid to form water and also a salt

Add water to a metal or oxide:

b. Heat the hydroxide, carbonate or nitrate of any metal" (except

potassium and sodium)

Add a solution of sodium hydroxide, potassium hydroxide. ammonium hydroxide to a solution of a salt

d. Burn a metal in air or oxygen

Which of the above can be used to prepare bases?

R. (a) and (b): only Q. (a) and (c) only R (c), (b) only

S. (b). (c) and (d) only:

(87) Fill in the following table

T. all of them.

·仙術期自李法我學型,每

1971 英文中學會考試題預習專欄

TE SUNLIGHT PRESS.

物理科(九)

PHYSICS

LESSON NIKE

23-12-1970

ANSWERS TO EXERCISE 7.

(14) B (15) E (16) R (17) R (20)

D (22) E (23)

(13)

(24)0

(19)

(25)

(27)

EXERCISE B

[(28)

(29) The final image formed by an astronomical telescope.

18 virtual. 2. is nverted relative to the ob subtends an angle at the eyepiece greater than the angle subtended by the obkect at the eyepiece. subtends an angle at the eyepiece greater than the angle subtended by the first image at the eyepice.

(30)

1.

is at 25 ch from the eye, under normal adjustment on of the following alterna

3, 4 and 5 only Q. 1, 2 and 3 only

1, 3 and 4 only S. 2, 4 and 5 only

1, 2 and 4 only

projection lantern

gives a larger picture the longer the focal Length of the projection lantern lens

gives an inverted image 2. gives a virtual image catsista of a condenser fu increasing the brigh→. tness of the image

had the film or slide as the ob

jection lens.

Silica of the following alternatives is true?

2,3 and 4 only

1,

1, 3, 4 and 5 only S,

and 5 on!

T- 1, 2, 3 and 5 only

(31) Which part of the human eye corresponds to the

ction of the stop in a camera?

A

D.

EXERCISE 9

ciliary muscles B. Eye-lid C. Irl blind-spot E. retina

§ 5. Colour and Photometry

(32) The colours in spectrum produced by white li

red, green, blue, violet

magenta 2. y yellow 3 indigo 4. pink orange

Which of the following alternatives is correct?

AUF KUW

1, 2 and 3 only

1, 3 and 5 only D.

2 and 5 only

2, 3 and 4 only

3 and 5 only.

33) Which of the following are complementary paira?

blue and yellow 2. green and agenta

3. red and peacock blue 5. blue and red

and B are 2 light sources, X and Y are the ac-

reens, the ratio of intensities of illumination on X and Y is

P. 1 1 Q. 9. T.

8:3

8 S. 31

(38) Brightness of a surface depends on

1 the amount of light incident on 31%,

the reflecting nature of the surface.

the area of the surface

the distance between the light source and surface

5. the angle at which light is incident on the surface Which of the following alternatives is true?

All of them Q. 1, 2, 4 and 5 only

R. 2, 3, 4 and 5 only S. 1, 3 and 5 only.

1, 2, 3 and 4 only

(39) The amount of light emitted by a source per sec

is expressed in

foot-candle Q. candle-power metre-candle/sec.

candle-power/sec.

Chapter IV

SOUND

joules

Sound Waves and Cha

(40) Sound travels faster 1-

cteristica

air Q. bydrogen R, liquid S. solid

часция

(41) The pitch of a note depends on

velocity of sound B. amplitude. C. wave-fore frequency E. its accompanied overtones

(2) The greatest distance through which a particle is

disturbed from rest is known as the

wavelength B. amplitude C. quality

auplitude E, resonance

The characteristics of sound depends on

1.

frequency 2. amplitude 3. overtones

velocity of sound 5. refraction of sound Which of the following alternatives is correct?

^, 2, 3 and 4 only B. 1 and 2 only

C. 4 and 5 only D. 1, 2 and 3 only

E

1 and 4 only

Which of the following set up compressions and rare- fractions in the medium? ·

water waves (2) vibrating string

3. longitudinal waves on a spring

sound waves in air

transverse waves on a string.

A. All of them · B. 1, 3 and 5 only

C. 1, 2, 3 and 4 only D. 3 and 4 only

E. 2, 4 and 5 only

(45) Two siren discs X, Y; X has 24 equally spaced holes

rotating with 10 rev./sec. Y has 30 holes and ro tating & rev./sec. The ratio of frequency produced by the is

(46)

44 magenta and red

A, 1, 2 and 3 only B. 2, 3 and 4 only 0.34 and 5 only D. 2, 4 and 5 only

1, 2 and 5 only

If green light is allowed to fall on a blue object, the object appears to be

ELECTROLYTE

Molten sodium chloride

ANODE

Carbon

At anode Chlorine

At cathode

Sodium:

(35) I

(a) Conc. sodium chloride

Carbon

green Byellow C. blue D. blank,

peacock blue filter, a magenta filter and yellow filter are placed one on the top of the other the combination appeara to br

colourless B. white C. black

A. 31

11

33 2 D. 53

Which of the following factors affect the of sound?

1. The medium in which sound travels

2. The period 3. The temperature

P.

The pressure 5.

The pitch

1, 2, 3 and 4 only

All of them Q. R. 1, 2 and 3 only S. 1 and 3 only T. 3 only

(47) Consider the two sound waves P and Q. which of the

following statements are correct?

P is louder

P has a higher pitch

3. - P hac, a onger wave length

P travels faster.

P has a lower frequency

1, 2, and 3 only

R.

2 and 4 only S.

Q.1, 3 and 4

3 and 5 ontv

(b) Copper chloride (c) Copper sulphate (d) Copper sulphate. (e) Molten sodium

hydroxide (f) Conc, hydrochloric

Acid

Carbon Copper

Platinum Nickel

A.

red

(36) A pure spectrum can be obtained by

(45)

ed ant

placing a convex lens behind the priam placing an identical prism behind the first in an exactly reversed position placing a concave lens in front of the prisa placing a convex lens in front of the priam placing a concave lens behind the prism

T.. 1, 3 and 5 only

Water wave is

progressive longitudinal. stationary Longitudinal. progressive taansverse. T.

longitudinal « stationary transvera

52. Vibrating Strings and hir Columine: