# Physical Sciences Grade 11 KZN September Test 2022 QP & Memo

> Grade 11 Physical Sciences question paper and memo from the KZN September Test 2022, 21 pages. Read online or get the free PDF download.

- Page: https://www.hlayiso.com/library/physical-science-grade-11-sept-2022-qp-and-memo/98249f21-1d5f-4b1b-b609-64f6094fbc30
- Updated: 2026-09-27
- Subject: Physical Sciences
- Grade: Grade 11
- Document type: Question paper and memo
- Year: 2022
- Exam period: KZN September Test
- Curriculum: CAPS
- Pages: 21

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## About this document

Physical Sciences · Grade 11 · KZN September Test · 2022. Question paper and memorandum, 21 pages. Read online or download the PDF.

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## Document text

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### Page 1

EDUCATION
REPUBLIC OF SOUTH AFRICA

NATIONAL
SENIOR CERTIFICATE

PHYSICAL SCIENCES
COMMON TEST
SEPTEMBER 2022

TIME: 2 hours

MARKS: 100

This question paper consists of 11 Pages, two data sheets and
one graph sheet.

### Page 2

Physical Sciences D own loaded fro m h layisg..¢ QWMNeommon Test
Downloaded from StalfinGPéptiysics. com

INSTRUCTIONS AND INFORMATION TO CANDIDATES

4. Write your name on the ANSWER BOOK.

2. This question paper consists of SEVEN questions. Answer ALL the questions in the
ANSWER BOOK.

3. Start EACH question on a NEW page in the ANSWER BOOK.

4. Number the answers correctly according to the numbering system used in thigeQuestion
paper. ew)

5. Leave ONE line between two subsections, for example between, (?
QUESTION 2.1 and QUESTION 2.2. A\

6. You may use a non-programmable calculator. Ry
7. You may use appropriate mathematical instuments

8. You are advised to use the attached DATA SHEE ;
g. Show ALL formulae and substitutions in ALL calculations.

40. Round off your final numerical XO ‘0 a minimum of TWO decimal places.

11. Give brief motivations, discussions, et cetera where required.

oe

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Physical Sciences September 2022 Common Test

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QUESTION 1 : MULTIPLE CHOICE QUESTIONS

Four options are provided as possible answers to the following questions. Each question
has only ONE correct answer. Write only the letter (A - D) next to the question number
(1.1 — 1.6) in the ANSWER BOOK, for example 1.7 D.

1.1 The north pole of a magnet is moved into a coil consisting of 20 turns of
insulated conducting wire. Which ONE of the following changes will INCREASE
the induced emf?

A _ Increasing the time taken for the magnet to move into the coil. &

B Decreasing the number of turns in the coil. ew)

C Moving the south pole of the magnet into the coil. o:

D Increasing the speed at which the magnet is moved into whee (2)

1.2 In the circuit below, the four bulbs P, Q, R and S are ent

oo &)

Which ONE tong pairs of bulbs has equal brightness?

A Ss and
B QandR
C PandQ
D QandS (2)

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PhysiFg! Sciences

oWildaded from Stanmerepbysics.com

September 2022 Common Test

1.3 The circuit diagram below shows two bulbs A and B connected in series, a
battery, an ammeter, and a voltmeter connected across resistor B. The battery,
ammeter and conducting wires have negligible resistance, while the voltmeter has

very high resistance.

How will the readings on the ammeter and the voltmeter change if the resistance
of the bulb B increases, while that of bulb A remains the same?

Ammeter Voltmeter
A | Increases Decreases
B | Decreases Decreases
C | Remains the same Increases
D | Décreasés Increases (2)
1.4. Which ONE of the following combinations of acids represent a polyprotic and a
monoprotic acid respectively?
A H2SO4 and H3PQO.4
B H3PO4 and HNO3
Cc H20 and H2CO3
D  CHsCOOH and HNO3 (2)
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September 2022 Common Test

Physical $ 5 :
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4.5 Which ONE of the following graphs CORRECTLY represents the deviation of a
real gas from ideal gas behaviour?

A B
p p
iv iN
Cc D
p p
In
(2)
1.6 The decomposition of water can be represented by the following chemical
equation:
2H,0 (g) ———* 2H(g) + O2(g) AH = +571,8 kJ-mol"
What is the heat of reaction for the formation of the two moles of H2?
A +571,8 kJ
B -571,8 kJ
C  -1143,6 kJ
D  +1143,6 kJ (2)
[12]

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Physi5a ded from Stanngcephysics. com September 2022 Common Test

QUESTION 2

The diagram below shows a bar magnet that is dropped vertically downwards into a
stationary coil. The direction of the current induced in the coil is shown.

2

2.1 ,StateFaraday's law of electromagnetic induction in words. (2)

)

aaa
()
ar

|

2.2 Determine the polarity of the bar magnet at X.

Choose from NORTH POLE or SOUTH POLE. (2)

2.3 What is the polarity of the coil at Y as the bar magnet exits the coil?
Choose from NORTH POLE or SOUTH POLE. (2)
[6]

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Si i September ommon
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QUESTION 3

A group of learners carried out an experiment to verify Ohm’s law.
The following components were used: A battery, a resistor R of unknown resistance, a
rheostat, an ammeter, a voltmeter, a switch and conducting wire.

3.1. State Ohm’s law in words. (2)

3.2 Sketch a circuit diagram to show how the above apparatus should be connected
for this investigation. (4)

3.3. Five readings were taken, indicated by the five points plotted in the graph below.

Current vs Potential difference

»
a

Current (A)
nN

on & wo

=

0 0.5 1 1.5 2 2.5 3
Potential difference(V)

3.3.1 What is the mathematical relationship between current strength and

potential difference? (1)
3.3.2 Is the graph drawn correctly? Give a reason for the answer. (2)
3.3.3. Calculate the resistance of resistor R using the graph. (2)
3.3.4 What physical quantity does the product of the current and the potential

difference represent for any point on the graph? Oy

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September 2022 Common Test

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QUESTION 4

In the circuit below, the emf of the battery is unknown and its internal resistance is
negligible. Four resistors, Ri, R2, Rs, and R4 are connected as shown in the diagram.
The resistance of Ri, R2, and R3 are 3,5 Q, 3. O and 100 respectively, and the ammeter

reads 1,25 A.
The resistance of R4 is unknown.

—Or-|1

Ry

1,25 A
302
_(m)
R2
100
Ra

(v)
YY

4.1 Calculate the reading on:
4.1.1. voltmeter V
4.1.2 ammeter Az

4.2 1200 C of charge flows through resistor R; in 5 minutes.
Calculate
4.2.1 The readingion ammeter As.
4.2.2 The resistance of resistor R4.
4.2.3 The emf of the battery.

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3,50

(3)

SES

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Physical Sciences September 2022 Common Test

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4.3 Aniron is rated “230 V , 2200 W “*

4.3.1 What information about the iron does the rating “2200 W” provide when it is
connected to a 230 V source? (2)

4.3.2 If the iron is connected to a 220 V source for 30 minutes, calculate the amount of
electrical energy transferred to the iron. (5)

4.3.3 If the cost of electricity is R 2,56 per kWh, calculate the cost of using the iron for
30 minutes. (3)
[25]

QUESTION 5

An investigation was done to determine the relationship between volume and pressure of a
fixed mass of dry gas. The table below shows the results of the investigation.

Volume(cm’*) | Pressure(kPa) pV

5 25,0 125

10 12,5 125

13 10,0 130

20 6,25 125

25 5,0 125

30 4,20 126

35 3,50 123
5.1. NAME and STATE in words the law being investigated here. (3)
5.2 Write down an investigative question for this investigation. (2)

5.3 Apart from the mass of gas, what other physical quantity must be kept constant (1)
during this investigation?

5.4 Use the attached graph paper on page 14 to draw a graph of VOLUME versus
PRESSURE for the gas. (4)

5.5 The product of the pressure and volume (pV) for each reading is approximately
constant. Show that the unit for pV is the JOULE.

(3)
5.6 When the pressure is extremely high, the pressure-volume relationship deviates
from the law referred to in Question 5.1. (3)
Explain.why this deviation occurs.
5.7 Caleulate the pressure exerted by the gas when the volume of the gas is
increased to 45 cm*.
(3)
[19]

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Physical Sciences 40 . September 2022 Common Test
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QUESTION 6

Cold packs and Hot packs are commonly used to treat injuries to reduce swelling in muscles.
Study the reactions taking place in the packs, and the graph below and answer the questions
that follow.

Cold pack: NH4NOs(s) +H20 ——* NH,"(aq) + NOs3‘(aq)

Hot Pack: 4Fe(s)+302(g) ———+ 2Fe,03 (s)

ay nase ———

ao

60

50

40 I r atl

30

Energy (KJ)
vi

—

eh

20

10

Extent of reaction

6.1 Define the term activation energy. (2)

6.2 Provide values from the graph for the following:

6.2.1 Activation energy for the reaction in the absence of a catalyst. (1)

6.2.2 Energy of products. (1)

6.2.3 AH (2)
6.3 Does the graph represent the reaction for the Hot pack or the Cold pack?

Give a reason for the answer. (2)

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September 2022 Common Test

Physical Scjence 11 -
Downloaded from Stanmosephysics.com

6.4 Define a catalyst? (2)

6.5 The reaction mixture is heated. How will this affect the activation energy for the
reaction at this higher temperature? Choose from INCREASES, DECREASES or

NO EFFECT (1)
[11]

QUESTION 7
7.1 Phosphoric acid (H3PO,) reacts with water through the following three step

reaction.

Step 1. H3PO4 + H2O = H2PO4 + H30*

Step 2. H2PO, + HO & HPO,” + H30*

Step 3. HPOw + HO = PO,* + H30*
7.1.1. Why is H3PO, a Lowry-Bronsted Acid? (2)
7.1.2. Define the term ampholyte. (2)
7.1.3 Identify TWO substances that act as ampholytes in the reactions above. (2)
7.1.4 Write down ONE conjugate acid-base pair for step 2. (2)

7.2 Complete and balance the following reactions:

7.2.1. CH3COOH +NaQH ———> (3)
7.2.2 HCf + CaCO; —_ (3)
[14]

TOTAL MARKS: 100

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DATA FOR PHYSICAL SCIENCES GRADE 11

PHYSICS :
FORMULAE : TABLE 1

September 2022 Common Test

\-2 R=
At I
1 1
R rn R=t+ Ib +fg+...
W=Vq _Ww
~ At
W=VIAt
W=PRat P=VI
; P=PR
We Viat Vv
R R
CHEMISTRY :
FORMULAE : TABLE 2
DV, PV,
abe 2 V=nRT
TT P
n=” n=
M Ny
n= cx" ORIOF ga
V, V MV

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September 2022 Common Test

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Physical Sci 14 . September 2022 C Test
‘Downloaded from Stanmexephysics.com “Pe emmon es

NAME OF SCHOOL:

NAME OF LEARNER : GR 11

QUESTION 5.4 ANSWER SHEET

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} KWAZULU-NATAL PROVINCE

EDUCATION
REPUBLIC OF SOUTH AFRICA

NATIONAL
SENIOR CERTIFICATE

GRADE 11

NB: This marking guideline consists of 7 pages.

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### Page 16

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Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test

NSC-Grade 11

QUESTION ONE

11 Dvv
12 Avv
13 Dv¥vv
14 BYY
15  Cvv
16 Dvv [12]
QUESTION TWO
2.1 |The magnitude of the induced emf across the ends of a conductor is
directly proportional to the rate of change in the magnetic flux linkage with
the conductor. v ” (2)
2.2 North/Nvv (2)
2.3 Positive marking from Question 2.2
Northy v (2)
[6]
QUESTION 3
3.1 The potential difference across a conductor is directly proportional to the
current in the conductor vat constant temperature. Vv (2)
3.2
@
WA R
: “Op
Marking Rubric
No | Criteria Mark
1__| All components included in diagram 1
2. | Ammeter connected in series to resistor R 1
3. | Voltmeter connected in parallel to R 1
4. | All components are connected correctly. 1 (4)

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Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test
NSC-Grade 11

3.3.1 Directly proportional” (1)
3.3.2 Nov ,the line is not drawn through the average of the plotted points. (2)
3.4.3 1 Al

RAV

=27%y
1-0

R =0,5QV (2)

3.4.4 PowerY v (2)
[13]

QUESTION 4
4.1.1 V=LRY =1,25x3 V=3,75 VW (3)

Positive marking from question 4.1.1
4.1.2 V

3,75
P= *
I = 0,375 AY (2)

421 Q=IAt y
1200 =1-300V
Il=4Ay (3)

4.2.2 Positive marking from Question 4.1 and 4.2

Ip = 4 =(1,25+0,375)V

=2,375A

R= V

~T
p27,

~ 2375"

= 1,58 0 /1,579 OW (4)

4.2.3 V=IR
=4x3,5v
=14V
EMF N, + 3,75” x
= 17,75 VW

a) (3)

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Physicsuemtsaded From Stanmorephysics. Ccsapiember 2022 Common Test
NSC-Grade 11

4.3.1 2200 J of energy is dissipated by the iron per secondv v (2)

2
4.3.2 p Vey

5000 = 230”
oR
R = 24,045 Q
v2
W=—AtY,
220?
= v
24,046 (1800)
= 3,62 x10® JV 6)

4.3.3. Energy used in kWh : 3,62 x10® J = 1,01 kWh Vv

1 kWh costs R 2,56
Cost of using the iron =1,01 x 2,56”
=R 2,59 V (3)
[25]

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Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test
NSC-Grade 11

QUESTION 5

5.1 Boyles Law” (3)
The volume of an enclosed mass of gas is inversely proportional to the
presi exeR By the gas when the temperature remains constant. vv

5.2 i 1 ionship between volume and pressure for a fixed mass of
gas.vv¥ (2)
Marking criteria:

e Identifying the two variables (pressure and volume).
e Correctly phrased as a question. =

5.3. Temperature (of the gas)”
5.4 Graph of Volume vs Pressure

‘ 7

Volume(cm?)
rey

3 19 1s 20 25 30
Pressure(kPa)
Marking Rubric
No | Criteria Mark
1 | All points correctly plotted 2
-1 if more than 2 points plotted incorrectly
2 | Volume on y-axis and Pressure on x-axis 1
3 _| Line of best fit curve drawn 1 (4)

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Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test
NSC-Grade 11

5.5 Pressure x Volume
=N.m?@v x mo v
N.m
Jv (3)

5.6 At very high pressure, the gas becomes less compressible.
The volume occupied by the gas is so small that intermolecular distance
between the molecules decreases. Thus an attractive force is observed

between molecules and gas may become a liquid.” (3)
5.7 PiVi = P2V2V
(3.5)(35)__= (P2)(45) ¥
3.5)(35) P2)(45 (3)
P2 = 2,72 cm8 Vv
[19]
QUESTION 6
6.1 The minimum energy needed for a reaction to take place. vv (2)
6.2.1 56kIY (1)
6.2.2 36 kIJv (1)
6.2.3 AH= Eproducts - Ereactants
= 36-10 v
= +26 kJv (2)
6.3 = Gold patky
Energy is absorbed./ Reaction is endothermic/ AH > OV (2)
6.4 ~ Substance that speeds up the reaction” by decreasing the activation
energy.” (2)
6.5 Noeffect v (1)
[11]

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Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test
NSC-Grade 11

QUESTION 7

7.1.1 It is a proton donor. ¥v (2)
7.1.2. Is a substance that can act as an acid or a base. vv (2)
7.1.3 H2PO4 V and HPO ¥ (2)
7.1.4 HePOs and HPO vv (2)

or H20 and H30*

7.2.1. CHs3COOH +NaOQH v ——> CHsCOONa + HO VY vbhal_ (3)
7.2.2 2HCl + CaCO3 ¥Y ——> CaCle + COz +H20v Ybal (3)

[14]

TOTAL MARKS: 100

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