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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).
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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: