# Physical Sciences Grade 10 P2 Gauteng November 2020 QP (Eng)

> Grade 10 Physical Sciences Paper 2 question paper from the Gauteng November 2020 (English), 9 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/gr10-phy-p2-english-2020-exemplars-question-paper/b73f7863-1dbd-4b9b-93ec-9ca726a859a8
- Updated: 2026-09-27
- Subject: Physical Sciences
- Grade: Grade 10
- Language: English
- Document type: Question paper
- Year: 2020
- Exam period: Gauteng November
- Paper: 2
- Curriculum: CAPS
- Pages: 9

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## About this document

Physical Sciences · Grade 10 · Gauteng November · 2020 · English. Question paper, 9 pages. Read online or download the PDF.

Read it free online on the page above; download the PDF from there.

## Document text

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               GAUTENG DEPARTMENT OF EDUCATION
                         PROVINCIAL EXAMINATION
                             NOVEMBER 2020
                                     GRADE 10

                    PHYSICAL SCIENCES (CHEMISTRY)
                               PAPER 2

TIME: 1½ hours

MARKS: 70

7 pages, 1 data sheet and 1 periodic table

                                                    b.o.

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                                              PHYSICAL SCIENCES (CHEMISTRY)               2
                                              GRADE 10             PAPER 2

INSTRUCTIONS AND INFORMATION

1.    Write your name on the ANSWER SHEET.

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

3.    Number the answers correctly according to the numbering system used in this question
      paper.

4.    You may use a non-programmable calculator.

5.    You may use appropriate mathematical instruments.

6.    You are advised to use the attached DATA SHEETS.

7.    Show ALL formulae and substitutions in ALL calculations.

8.    Round off your FINAL numerical answers to a minimum of TWO decimal places.

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

10.   Write neatly and legibly.

                                                                                         P.T.O.

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                                               PHYSICAL SCIENCES (CHEMISTRY)                    3
                                               GRADE 10             PAPER 2

QUESTION 1: MULTIPLE CHOICE QUESTIONS

Various options have been provided as possible answers to the following questions.
Choose the answer and write only the letter (A – D) next to the question numbers
(1.1 to 1.5) in the ANSWER BOOK, e.g. 1.6 D.

1.1   Air can be classified as a/an…

      A      homogeneous mixture.
      B      element.
      C      heterogeneous mixture.
      D      compound.                                                                    (2)

1.2   According to the Kinetic Molecular Theory the particles of a solid ...

      A      vibrate in their fixed positions and have a fixed shape.
      B      are free to move and are compressible.
      C      are free to move and have a fixed shape.
      D      vibrate in their fixed positions and are compressible.                       (2)

1.3   Which one of the following electron configuration notations represent an ion of a
      halogen?

      A      1s2 2s2 2p6 3s2
      B      1s2 2s2 2p6 3s2 3p6
      C      s2 2s2 2p6 3s2 3p5
      D      1s2 2s2 2p6 3s2 3p1                                                          (2)

1.4   There are … atoms of hydrogen in 2 moles of NH3.

      A      5 x 1023
      B      3,1 x 1023
      C      3,61 x 1024
      D      4 x 1023                                                                     (2)

1.5   The percentage hydrogen in C2H4 is …

      A      4 %.
      B      85, 71 %.
      C      66,67 %.
      D      14,29 %.                                                                     (2)
                                                                                          [10]

                                                                                           P.T.O.

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                                                    PHYSICAL SCIENCES (CHEMISTRY)                4
                                                    GRADE 10             PAPER 2

QUESTION 2

2.1 The heating curve of a substance is shown below.

                     Temperature

                                               Time (minutes)

       2.1.1   Write down the physical state of the substance at t = 15 minutes.           (1)

       2.1.2   What is the boiling point of any substance?                                 (2)

       2.1.3   Give the value and unit of the freezing point for the substance in the
               graph.                                                                      (2)

       2.1.4   How will the average kinetic energy of the particles of this substance be
               affected between:

               (a)        t = 0 minutes and t = 5 minutes                                  (1)
               (b)        t = 5 minutes and t = 10,5 minutes                               (1)

               (Write down only INCREASE, DECREASE or REMAINS THE SAME.)

       2.1.5 Refer to the Kinetic Molecular Theory to fully explain the answer to
             QUESTION 2.1.4 (b).                                                           (3)
                                                                                           [10]

                                                                                            P.T.O.

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                                              PHYSICAL SCIENCES (CHEMISTRY)                   5
                                              GRADE 10             PAPER 2

QUESTION 3

3.1   Complete the table below. Write only the answer next to the question number
      (3.1.1 – 3.1.5).

         Element        Atomic       Mass     Number of      Number of   Number of
                        number      number     protons       neutrons    electrons
        Potassium         19          39        3.1.1          3.1.2       3.1.3
        Magnesium         12         3.1.4       12             12         3.1.5
           ion                                                                          (5)

3.2   Lithium occurs as two isotopes in nature. 7 % lithium-6 atom and 93 % lithium-7
      atom.

      3.2.1 Define the term isotopes.                                                   (2)

      3.2.2 Calculate the relative atomic mass of lithium.                              (3)
                                                                                        [10]

QUESTION 4

Magnesium reacts with chlorine gas to form magnesium chloride.

4.1   Define the term ionic bond.                                                       (2)

4.2   Write down the chemical formula of magnesium chloride.                            (2)

4.3   For the chlorine atom:

      4.3.1   Draw the Aufbau diagram.                                                  (3)

      4.3.2   Write down the valence electrons.                                         (1)

4.4   Write down the electron configuration notation (sp notation) of magnesium.        (2)

4.5   Show the formation of magnesium chloride by using the Lewis dot diagrams.         (4)
                                                                                        [14]

                                                                                         P.T.O.

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                                               PHYSICAL SCIENCES (CHEMISTRY)                  6
                                               GRADE 10             PAPER 2

QUESTION 5

The empirical formula of a certain compound needs to be determined.

The compound has 62,5 % of Pb; 8,45 % of N and 29,05 % of O.

5.1   Define the term empirical formula.                                                (2)

5.2   Determine the empirical formula of this compound.                                 (6)
                                                                                        [8]

QUESTION 6

Consider the following chemical reactions.

A:     SO2(g) + O2 → SO3(g)
B:     KCℓO3(s) → KCℓ(s) + O2(g)
C:     Aℓ + Fe2O3 → Al2O3(s) + Fe(s)
D:     C2H6(g) + O2(g) → CO2 + H2O(g)
E:     2NaBr(aq) + Cℓ2(g) → 2NaCℓ(aq) + Br2(ℓ)

6.1   Balance equations A, B, C and D by writing out the full equation in your answer
      sheet.                                                                            (4)

6.2   State the Law of constant composition.                                            (2)

6.3   Show by calculation that the mass is conserved in reaction E.                     (5)
                                                                                        [11]

                                                                                         P.T.O.

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QUESTION 7

33,5 g sodium carbonate reacts with 500 cm3 hydrochloric acid according to the
balanced equation.

                Na2CO3(s) + 2HCℓ(ℓ) → 2NaCℓ(aq) + CO2(g) + H2O(g)

                                         HCℓ

                        Thistle funnel

                       Double bore
                          cork                   CO2 gas

                         Na2CO3

                                                                     Lime water

7.1   What does (aq) mean?                                                               (1)

7.2   Calculate the number of moles of sodium carbonate.                                 (3)

7.3   By using the mole ratio of the reactants, determine the number of moles of the
      500 cm3 hydrochloric acid that reacted completely with the 33,5 g sodium
      carbonate.                                                                         (2)

7.4   What is the function of the lime water shown in die diagram?                       (1)
                                                                                         [7]

                                                                                  TOTAL: 70

                                               END

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DATA FOR PHYSICAL SCIENCES GRADE 10
PAPER 2 (CHEMISTRY)

GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 10
VRAESTEL 2 (CHEMIE)

TABLE 1: PHYSICAL CONSTANTSI/TABEL 1: FISIESE KONSTANTES

NAME/NAAM SYMBOL/SIMBOOL | VALUE/WAARDE
tvcgadho tonetante Na 6,02 x 10 mor"
nai op citation e 16x 10°C
Ben mass me 9,11. x 107" kg
Moir gaovolane by STD Vn 22,4 dm?-mor"

TABLE 2: FORMULAE/TABEL 2: FORMULES

m Vv
n=— or/of n=—- n=
M Vm

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       THE PERIODIC TABLE OF ELEMENTS
  DIE PERIODIEKE TABEL VAN ELEMENTE

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