Grade 12 Physical Science (PS) March Paper and Memo - 2024
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Course
Physical Sciences
Institution
12th Grade
Grade 12 Physical Sciences March Paper and Memo:
Total: 100 Marks.
This exam paper covers the following work:
50/50 Newton's Laws | Momentum & impulse | Vertical projectile motion | Organic Chemistry
This is a practice paper with memorandum meant to test the student's knowledge, and wil...
QUESTION 1
Various options are provided as possible answers to the following questions. Choose the correct
answer and write ONLY the LETTER (A-D) next to the QUESTION NUMBER (1.1-1.7) on your
folio paper. Example 1.8. D.
1.1 Which of the following pairs of compounds contains members of the same homologous
series?
A C2H4 and C3H8
B C2H4O and C3H6O
C C3H6 and C4H6
D CH4O and C2H4O2
1.2 In which of the following cases would the resultant force acting on an object be equal to 0N.
A An object moving with constant acceleration.
B When the only force acting on the object is gravitational acceleration.
C An object that undergoes equal displacements every second.
D An object is moving with increasing acceleration.
1.3 Which of the statements below best describes Weightlessness?
A An object moving at constant velocity upwards from the ground.
B An object moving at constant velocity downwards from the ground.
C An object that is accelerated upwards away from the ground by a constant applied
force.
D An object accelerates downwards towards the Earth with an acceleration of 9.8m.s -2.
1.4 The inertia of an object …
A is greater if its mass is smaller.
B increases as the applied force on the object increases.
C is the resistance to any change in its state of motion.
D increases as the frictional force on the object increases.
1|Page www.summariessa.co.za Physical Sciences
Grade 12 March Paper
,1.5 An astronaut has a weight Fg on Earth. What distance, in terms of the radius of
the Earth (r), will the astronaut be if his weight is a 1⁄4 of his weight (F g) on the
surface of the Earth?
A 2r
B R
C 1⁄2 r
D 1⁄4 r
1.6 A box is pushed forward with a force of 100N but does not move. A possible reason for this
is that:
A frictional force is also 100N.
B frictional force is more than 100N.
C frictional force is less than 100N.
D none of the above.
1.7 A box is pushed forward with a force of 100N but does not move. A possible reason for this
is that:
A frictional force is also 100N.
B frictional force is more than 100N.
C frictional force is less than 100N.
D none of the above.
[14]
QUESTION 2
Three organic compounds (A, B and C) with different functional groups are given below.
2.1 Write down TWO special properties of carbon which make it possible for
carbon to form such a variety of organic compounds. (2)
2.2 Define the term functional group. (2)
2.3 Write down the:
2.3.1 Structural formula of compound A (2)
2.3.2 IUPAC name of compound B (2)
2|Page www.summariessa.co.za Physical Sciences
Grade 12 March Paper
, 2.4 Compound C, pentane and a compound X are compounds that have the
same molecular formula but different structural formulae.
Write down the:
2.4.1 Term used for the underlined phrase. (1)
2.4.2 Structural formula and IUPAC name of compound X (4)
[13]
QUESTION 3
Three compounds are used to investigate one of the factors that influences boiling
point. The results obtained are shown in the table below.
COMPOUND MOLECULAR MASS
(g∙mol-1
)
3.1 In one investigation the boiling points of compound B and compound C are
compared.
3.1.1 Is this a fair investigation? Write down YES or NO. Refer to the data
in the table and give a reason for the answer. (2)
3.1.2 Write down the independent variable for this investigation. (1)
3.2 Which ONE of the compounds (A, B or C) has the highest vapour pressure?
Give a reason for the answer. (2)
3.3 Refer to the intermolecular forces present in each compound and FULLY
explain the trend in boiling points, as shown in the above table. (5)
3.4 Which compound, BUTAN-1-OL or PROPAN-1-OL, has the higher boiling
point? Give a reason for the answer. (2)
[12]
QUESTION 4
4.1 Consider the TWO reactions of haloalkanes with sodium hydroxide (NaOH)
shown below.
4.1.1 Which reaction (I or II) is classified as elimination reaction? (1)
Write down:
4.1.2 The IUPAC name of the ORGANIC product formed in reaction I. (2)
4.1.3 A balanced equation for reaction II using structural formulae for the
organic reagents. (5)
3|Page www.summariessa.co.za Physical Sciences
Grade 12 March Paper
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