報日僑華
五第
BI+A=#*#32 WAH KIU YAT PO
1974 英文中學會考試題預習專欄:
四期星
日一十月三年一七九一写公年十六國民着中
MXAMINARE | SUNLIGHT PRESS
物理科
LESSON TWENTY
REVISION: TEST:
PHYSICS
MULTIPLE CHOICE SECTION
(1) A piece of glass (S.C. 6 2) is suspended by
thread with spring balance and placed in water
and then in a liquid of 5.0. 0.8 as shown:
(+)
10-3-1971
1971 英文中學會考試題預習專欄
WWE SUNLIGHT PRESS
化學科
CHEMISTRY
夏僑
(二十)
ルー
中文中學會考試題預習專欄
LESSON TWENTY
J-3-1971
ANSWERS TO EXERCISE 18:
數骨科(十) 張正部
(181) B
(182) p (183)
E
(184) E
(185) E
= 1+ 4 Sm — Sing
(186)
(187) S (188)
P
(189) T
(190) F
第十九次預習題解答
(191)
CHLORINE
BROMINE
TODINE
(1) △ABC之外援园半棒為R,
(A). Appearanc
Greenish-
Dark-red
Black crystal-
yellow gas
volatile
line solid;
ㄚ為内切因之半径,試証:
pungent smell
liquid; pungent
forms violet
r = 4RSin Sin
vapour
(证明)
smell,
(S—R) (S−b)(S~ <)
45(5-0)(5-1) (S−c)
sabc
poisonous
599.
HO
(Fig. d and e represents that only half the volume
of the solid is immersed.).
Consider the following statements:
1.The reading of balance in c is greatest.
2. The reading of balance in d is smaller than that
in each
3. The reading of balance
in b.
(B) Boiling
point (C) Melting-
point (D) Specific
gravity (E) Water
a is the same as that
(F) Bleaching
4. The reading of balance in a is greater than tha
in d.
When the glass is lowered further down in c. point is reached at which the reading of the balan becomes zero. (without touching the bottom of the breaker.}...
Which of the following alternatives is true?
A.. 2 and 4 only
B. 1, 3 and 4 only
C. 1, 3 and 5 onlv.
D. 1, and 2 only
2, 3 and 5 only
(2) Which of the following relations have the same meaning
Mass of a body
action
oxidizing agents% Metals and non-metals (1) Duute dil-ali
(J) Concentrated
alkalis
(K) Displacement
reactions
sonous
Slightly soluble;
114 sublime) 4.9
Slightly. soluble;
Almost insol- uble
forno acids, forns acids, HC1 and HC10; HB and
(de composes HBrO
water in sun
light)
Strong
Weak and
slow.
Strong
Fairly
strong
Reacts
Reacts.
Vigorously moderately Forms chlore Fords bro ides and mides. and hypochlorites hypo-
bromites
Forms chlorides Forms and chlorates bromides
and bronates Displaces bro- Displaces: mine and fodine fodine from bromides from and iodides jodides
Reacts least. vigorously.
Forms odides and hypoiodité.
S
Forms iodides and fouates
a = BD+ DC
(4) cz!! Ya + Yb + &c=Y= 4R
BD or cat of DC=Y GZ = BE) Ya+ Yb + Yc
a=rest - +rcot =
=(mt)
•2RSLA 2R 25
Sm
झ्ने नै हुन्छ ? हुन्छ उँ
+ +इन्ट
= a[stat sty+stc-#]"
=(A[ 25=sa-sb-sc + Q6
<<< [0+ab] =
4R
ab] abc
(5) #1BB (Ya-YJLF-1)(1-T)
ARYA
(EF) (Ta−1)(16-Y) (YE — Y) =(-a-π---
डाउन डेडिट है)
S syst
Volume of A
Density of à ̈
(in C.C.
Density of water
Weight of A Height of A in water
Density
Density of water
of the bod
in.
system,
Mass
Lass of equal volume of wat
A. 4 and 5 only
B. 1, 2 and 3 only
C. 2, 3 and 5 only
and
3 and
onl only
(3) A body or weight w suspended by a string is pulled
by a horizontal force F. (using a spring balance) shown. The tension of the string can be found by several methods: (Y and A are given)
1. Using triangle of forces with W, Fang
Tas sides of the triangle:
2. By taking moments at P
3. By finding the resultant of F and W, the
opposite force is T
By resolving F and W into 2 components on parallel to T, the other perpendicular. The.
vector sum of resultant components is the tension. By taking
at r
A, 1, 2, 3 and 4 onl
B. 1, 4 and 5 only
C. 2, 3 and 5 only
3, 4 and 5 only
E. All of them
EXERCISE 19
(192) There are three main kinds of steels:
(A) mild, Hard and Alloy steels. (B) Soft, Hard and Mild steels. (C) Cobalt, Mild and Alloy steels, (D) Cobalt, Hard and Alloy Steels. (E) Cobalt, Mild and Hard Steels. (193) Hard steels, containing about
0,1% - 0.2% of carbon (B) 0.2% 0.3% of carbon (C) 0.3% - 0.4% of cerbon (D) 0.5% 1.5% of carbon
2% -2.5% of carbon
(194) When Iron rusts in damp air, it forms hydrated.
ferric oxide or rust whose formula is
(A)
302
H2O
(B)
4Fe +30 + 280
Fe
(D) 4Fe + 302 + 5110.
(C) 4Fe 302 320
{E) 4Fe + 302 + xH_0
(195) Steam will react with heated metal, forming.
(Fe 0) 1.c.,
(A) triferric oxide
(B)
triferric tetroxide
(C) hydrated ferric oxide.
(D) ferric oxide
(E) ferrous oxide.
(196) Complete the following table:
PROPERTIES OF PHOSPHOROUS
RED
WHITE YELLOW
+Y=4RSW?
•(2) 32 Yo Yo Yo & DABC ZI 傍切图半佳 工為傍心脏明
Ya = stan^==
ERA)
SABC= AABIL+AACI1-
±ra(c+b-a)
-a-2a)
+
Ya (s-a)
abe sake
abc
(6) #2 YQ=Y=YL + Y¢ W=A
· 818=6V
同理=
AADI +
Ya=AD Ian
BUSZA 40 ÁÐTM AE
ADTAE ZAD ~AD - AB+BD
AE
=AB+BF
ACCE =AC +CF
2AD=AB+BETART CF
= ABT BC TAC
ZAPRS
stan
B = 1b = stan
<= rc = stan =
5(5-6) (5-6) (5-4)
s(b+c-a)-60
=(a+b+c)(b+c
△ABC為-三角形
第二十次預習題
BER] Sim₤=
Cos/24-tan-
(2) BEBA b GS = C+CGs B.
()}=hmbeikš 8, 12, 16
試求其名角之正弦,
(4)自某山麓之一點A與傳釘機.5 點之仰角南60°,再消點界地 早綫成30°角之斜坡上行-哩 達至點,測得∠BCA
求山之高度,
135
() {S}} |+ Tan2x lanX=See)
(6) A, B, C = 43IME.
(3) BEHA =+ |= Co Pt Cof+ Coc * Colt Shop Sing
CRC-GDA
(4) Which of the following can be expressed
the same
M. Work
2. Pover
3. Energy-
4. Quantity of heat.
Quantity of electricity
A. 1, 2 and 3 only
B. 1, 3 and 4 only.
C. 1, 4 and 5 only
3. only
and 5 only
A metre-rule is found to balance at the 49 cm mark When a weight of 50 gm is suspended at the 10 cm. mark, the balance point is found to be at 36 cm. mark. The weight of the metre scale is.
A. 25 gm
B. 50 gm
.C., 75 gm
D. 100 gr
(6) The velocity ratio of
1. an inclined plane is equal to sin A when A
the angle of inclination to the horizontal.
2.a wheel and axle is equal to the ratio of diameter
of wheel to diameter of axle,
a pulley system is equal to the number of pulleys.
a screw jack is equal to the pitch.
all machines increase with M.A%
Which of the above statements are true?
P. 1, 2, 3 and 5 onl
S. 2, 4 and 5 oni. T. All of them.
(a) Appearance
(c) Melting Point
(b) Stability
(d) Boiling Point
(e) Specific Gravity
(f) Solubility a
(g) Reaction with
NaOH Solution
(197) Write
out the formula for the following compound
of phosphorus
(a) phosphorus trioxide
(b) phosphorus pentoxide.
(c) metaphosphoric acid
(d) orthophosphoric acid
(e) phosphorous žeid
(f) Sodium dihydrogen phosphate
(g) Disodium hydrogen phosphate (h) Trisodium phosphate
having no change in momentum. Momentum.
conser
P203
the distance covered in each second is in arithmetic progression. ..
the power consumed is uniform.
Which of the following alternatives is true?
Q.1, 4 only
P. 1, 3 and 5 only
2, 3 and 4 only
T. All of them
B. 1, 4 and 5 only
Q. 1, 2 and 5 only
R. 2 and 3 only
(7) A body moves with a uniform acceleration of 2ft/sec2
implies
a suitable force (constant value) is acting on the body is moving with a velocity of 2ft/sec,
B) A force of 60 gm is just sufficient to push a block
of wood 100 gm up an inclined plane with
horizontal, The coefficient of.
10
(9) A bubble of air of volume 1/4c.c. at atmospheric
pressure, rises into the vacuum at the top a mercury barometer. The reading of the barometer drops from 75 cm.
0 cm. The volume of the air how occupies
P.
3.75
0.0.
Q. 1.25 c.c.
R. 5 c.c.
S.
15
to the
ANSWERS TO REVISION TEST. 1
JOANAL PART WILL BE GIVEN. NEXT TIME