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Chemistry 10 Past Paper 2026 | Notely

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All Chemistry 10 papers

Matric 10 · Past paper

Chemistry 10 past paper 2026

82 published questions in this index. The full practice view lets you work through them and track your own attempts.

24 MCQs58 written questionsPractise this paper

Question index

1
A student places a piece of dry ice (solid CO₂) in a sealed container. After a while, the container expands and may even burst. What is the best explanation for this?
MCQmodelMatter
1(ix)
How many grams of NaCl are present in 2 moles of sodium chloride? (Molar mass of NaCl = 58.5 g/mol)
MCQspecimenMatter
2(i)
A gas sample has a volume of 72 dm³ at room temperature and pressure. How many moles of gas does it contain?
Part B3 marksmodelStoichiometry
2(i)
A gas sample has a volume of 72 dm3 at room temperature and pressure. How many moles of gas does it contain?

This is a skimmable index, not a replacement for the study surface. Open the practice view to answer questions and use the linked study material.

Part B3 marksspecimenStoichiometry

2(ii)

(a) What is molarity? How can you convert molarity to g/dm³? (b) What is the molarity of a solution made by dissolving 98 g of H₂SO₄ in 1 dm³ of water? (Molar mass of H₂SO₄ = 98 g/…

Part B1.5 marksmodelStoichiometry

2(ii)

a. What is molarity? How can you convert molarity to g/dm3? b. What is the molarity of a solution made by dissolving 98 g of H2SO4 in 1 dm3 of water? (Molar mass of H2SO4 = 98 g/mo…

Part B1.5 marksspecimenStoichiometry

2(iii)

A sample of calcium carbonate (CaCO₃) contains 20 grams of calcium. What mass of carbon dioxide (CO₂) is produced when the calcium carbonate is heated?

Part B3 marksmodelStoichiometry

2(iii)

A sample of calcium carbonate (CaCO3) contains 20 grams of calcium. What is the mass of carbon dioxide (CO2) produced when the calcium carbonate is heated?

Part B3 marksspecimenStoichiometry

9

How many grams of NaCl are present in 2 moles of sodium chloride? (Molar mass of NaCl = 58.5 g/mol.)

MCQmodelStoichiometry

Q.4

Carbon dioxide is produced by 2CO(g) + O₂(g) → 2CO₂(g). If 28 g CO reacts with excess O₂: (a) calculate moles of CO, (b) moles of CO₂, (c) mass of CO₂, and (d) volume of CO₂ at RTP…

Part C1.5 marksmodelStoichiometry

Q.4

An unknown hydrocarbon from crude oil has molar mass 70 g/mol and data: carbon 10.0 g, hydrogen 3.0 g, nitrogen 2.0 g. Calculate its empirical and molecular formula.

Part C4 marksmodelStoichiometry

Q.4

Carbon dioxide (CO2) is produced by the reaction of carbon monoxide (CO) with oxygen gas (O2) according to the balanced equation: 2CO(g) + O2(g) -> 2CO2(g). If 28 g of carbon monox…

Part C1.5 marksspecimenStoichiometry

Q.4

A student is working in a lab and has been assigned a task to examine an unknown hydrocarbon. The compound has been isolated from a crude oil sample and has a molar mass of 70 g/mo…

Part C4 marksspecimenStoichiometry

1(ii)

What is the direction of flow of electrons in an electrolytic cell?

MCQspecimenElectrochemistry

1(xii)

Which of the following equations will take place at the anode during the electrolysis of an aqueous CuSO4 solution?

MCQspecimenElectrochemistry

2

What is the direction of flow of electrons in an electrolytic cell?

MCQmodelElectrochemistry

2(i)

Based on the given standard electrode potential values, arrange Mg, Cu and Ni in increasing reactivity. Explain how electrode potential relates to metal reactivity. Mg²⁺ + 2e⁻ → Mg…

Part B1 marksmodelElectrochemistry

2(i)

Based on the given standard electrode potential (E°) values, arrange the following metals in order of increasing reactivity. Explain how electrode potential relates to metal reacti…

Part B1 marksspecimenElectrochemistry

2(v)

(a) What are reactants in a hydrogen-oxygen fuel cell? (b) Which electrode undergoes oxidation? (c) Write the overall reaction equation.

Part B3 marksmodelElectrochemistry

2(v)

a) What are the reactants in a hydrogen-oxygen fuel cell? b) Which electrode in a hydrogen-oxygen fuel cell undergoes oxidation c) Write the overall reaction equation for a hydroge…

Part B3 marksspecimenElectrochemistry

2(xi)

Zinc plating is carried out to prevent iron corrosion. Describe its complete process and chemical reactions at anode and cathode.

Part B1.5 marksmodelElectrochemistry

2(xi)

Zinc plating is carried out to prevent iron from corrosion. Describe its complete process and chemical reactions taking place at anode and cathode.

Part B1.5 marksspecimenElectrochemistry

12

Which equation will take place at the anode during electrolysis of an aqueous CuSO₄ solution?

MCQmodelElectrochemistry

Q.6

(a) Draw a schematic diagram for electrolysis of dilute copper(II) sulphate using inert or copper electrodes. (b) Label anode, cathode, electrolyte, and direction of ion movement.…

Part C1 marksmodelElectrochemistry

Q.6

a) Draw a schematic diagram for the electrolysis of dilute copper(II) sulphate using inert or copper electrodes. b) Label the anode, cathode, electrolyte, and the direction of ion…

Part C1 marksspecimenElectrochemistry

1(iii)

In the following reaction, N2(g) + 3H2(g) 2NH3(g). Which physical factor has the greatest impact on the reaction rate as the reaction progresses?

MCQspecimenReaction Kinetics

1(vii)

A student plotted a graph of reactant concentration versus time for a chemical reaction. What does a steeper slope indicate?

MCQspecimenReaction Kinetics

3

In the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g), which physical factor has the greatest impact on the reaction rate as the reaction progresses?

MCQmodelReaction Kinetics

7

A student plotted a graph of reactant concentration versus time for a chemical reaction. What does a steeper slope indicate?

MCQmodelReaction Kinetics

1(i)

A student places a piece of dry ice (solid CO2) in a sealed container. After a while, the container expands and may even burst. What is the best explanation for this?

MCQspecimenSalts

1(iv)

Which cations generally form soluble salts in water?

MCQspecimenSalts

1(v)

The products of the reaction of an acid with an insoluble base are?

MCQspecimenSalts

1(viii)

What is the purpose of evaporation in salt purification?

MCQspecimenSalts

2(vi)

How does the lattice structure of salts contribute to their physical properties?

Part B3 marksmodelSalts

2(vi)

How does the lattice structure of salts contribute to their physical properties?

Part B3 marksspecimenSalts

4

Which cations generally form soluble salts in water?

MCQmodelSalts

5

The products of the reaction of an acid with an insoluble base are?

MCQmodelSalts

8

What is the purpose of evaporation in salt purification?

MCQmodelSalts

1(vi)

What are essential conditions used in the manufacture of ammonia in Haber process?

MCQspecimenNitrogen, Sulphur And Metals

2(ii)

The Contact Process is an industrial method for sulfuric acid production. (a) Write the balanced symbol equation for conversion of sulfur dioxide to sulfur trioxide. (b) Identify t…

Part B1 marksmodelNitrogen, Sulphur And Metals

2(ii)

The Contact Process is an industrial method for sulfuric acid production. a. Write the balanced symbol equation for conversion of sulfur dioxide to sulfur trioxide in the Contact p…

Part B1 marksspecimenNitrogen, Sulphur And Metals

2(ix)

Give reactions to illustrate how unburned hydrocarbons contribute to formation of peroxyacetyl nitrates (PANs).

Part B1 marksmodelNitrogen, Sulphur And Metals

2(ix)

Give reactions to illustrate how unburned hydrocarbons contribute to the formation of peroxyacetyl nitrates (PANs)?

Part B1 marksspecimenNitrogen, Sulphur And Metals

2(v)

Write chemical equations for reactions of (a) zinc with steam, (b) magnesium with hydrochloric acid, and (c) sodium with cold water.

Part B1 marksmodelNitrogen, Sulphur And Metals

2(v)

Write the chemical equations for the reactions of: a. Zinc with steam. b. Magnesium with hydrochloric acid. c. Sodium with cold water.

Part B1 marksspecimenNitrogen, Sulphur And Metals

2(vii)

Why are SO₂ and CO₂ classified as acidic oxides and CuO and CaO considered basic oxides?

Part B1.5 marksmodelNitrogen, Sulphur And Metals

2(vii)

Why are SO2 and CO2 classified as acidic oxides and CuO and CaO considered basic oxides?

Part B1.5 marksspecimenNitrogen, Sulphur And Metals

6

What are essential conditions used in the manufacture of ammonia in Haber process?

MCQmodelNitrogen, Sulphur And Metals

Q.3

Describe general chemical properties of metals with reference to reactions with (i) dilute acids, (ii) cold water, (iii) steam, and (iv) oxygen. Provide balanced equations.

Part C1 marksmodelNitrogen, Sulphur And Metals

Q.3

Describe the general chemical properties of metals with reference to their reactivity with: i. Dilute acids ii. Cold water iii. Steam iv. Oxygen. Provide balanced chemical equation…

Part C1 marksspecimenNitrogen, Sulphur And Metals

Q.5

Metals X, Y, and Z were tested: X reacts with cold water forming hydrogen; Y does not react with water but reacts with hydrochloric acid forming hydrogen; Z reacts with neither wat…

Part C3 marksmodelNitrogen, Sulphur And Metals

Q.5

Metals X, Y, and Z were tested for their reactivity with dilute acid and water. Metal X reacts with cold water, forming hydrogen gas. Metal Y does not react with water but reacts w…

Part C3 marksspecimenNitrogen, Sulphur And Metals

1(xi)

Gasohol is a mixture of?

MCQspecimenOrganic Chemistry

2(iii)

Draw structural formulae of (a) pent-2-ene, (b) but-1-ol, and (c) pentanoic acid.

Part B1 marksmodelOrganic Chemistry

2(iii)

Draw structural formula of following: a. Pent-2-ene b. But-1-ol c. Pentanoic acid

Part B1 marksspecimenOrganic Chemistry

Q.3

Identify functional groups in (a) HCOOCH₃, (b) CH₃–C≡C–CH₃, (c) C₃H₆, and (d) C₄H₁₁OH.

Part C1 marksmodelOrganic Chemistry

Q.3

Identify the functional groups in the following compounds: a. HCOOCH3 b. CH3-C≡C-CH3 c. C3H6 d. C4H11OH

Part C1 marksspecimenOrganic Chemistry

2(ix)

(a) What are the primary fossil fuels used for energy production? (b) Identify the fossil fuel mainly composed of methane. (c) Among coal, petroleum, and natural gas, which is the…

Part B1 marksmodelHydrocarbons

2(ix)

a. What are the primary fossil fuels used for energy production? b. Identify the fossil fuel that is mainly composed of methane. Among coal, petroleum, and natural gas, which is co…

Part B1 marksspecimenHydrocarbons

2(vii)

Complete: (a) CH₃–CH₂–Br + alcoholic KOH → Y; (b) Y + Br₂ → Z.

Part B1.5 marksmodelHydrocarbons

2(vii)

Complete the following reactions: a. CH3-CH2-Br + alcoholic KOH -> Y b. Y + Br2 -> Z

Part B1.5 marksspecimenHydrocarbons

2(viii)

Why is petroleum considered a mixture? Give three examples of a hydrocarbon found in petroleum.

Part B1.5 marksmodelHydrocarbons

2(viii)

Ethene and ethane belong to different classes. How can they be distinguished? Write at least two tests in each case.

Part B1 marksmodelHydrocarbons

2(viii)

a. Why is petroleum considered a mixture? Give three examples of a hydrocarbon found in petroleum.

Part B1.5 marksspecimenHydrocarbons

2(viii)

Ethene and ethane are hydrocarbons which belong to different classes. How can they be distinguished? Write at least two tests in each case for the support of your answer.

Part B1 marksspecimenHydrocarbons

1(x)

Which one of the following compounds is formed by oxidation of ethanol?

MCQspecimenHydroxy Compounds

2(x)

Explain combustion of alcohols and why they are cleaner fuels compared to fossil fuels.

Part B1.5 marksmodelHydroxy Compounds

2(x)

Explain the combustion process of alcohols and discuss why they are considered cleaner fuels compared to fossil fuels?

Part B1.5 marksspecimenHydroxy Compounds

2(xi)

Explain formation of ethanol by (a) fermentation and (b) catalytic addition of steam, with balanced chemical equations.

Part B1.5 marksmodelHydroxy Compounds

2(xi)

How will you explain the formation of ethanol by: a. Fermentation and catalytic addition of steam. Explain your answer with balanced chemical equations.

Part B1.5 marksspecimenHydroxy Compounds

10

Which compound is formed by oxidation of ethanol?

MCQmodelHydroxy Compounds

11

Gasohol is a mixture of?

MCQmodelHydroxy Compounds

2(vi)

(a) What is esterification? Provide a general reaction equation. (b) Why is esterification considered a condensation reaction?

Part B2 marksmodelCarboxylic Compounds

2(vi)

a. What is esterification? Provide a general reaction equation to illustrate the process. b. Why is esterification considered a condensation reaction?

Part B2 marksspecimenCarboxylic Compounds

2(iv)

(a) What is a polymer? (b) Name the basic building blocks of polymers. (c) Which polymer is commonly used to make plastic bottles?

Part B1 marksmodelPolymers

2(iv)

a. What is a polymer? b. Name the basic building blocks of polymers. c. Which polymer is commonly used to make plastic bottles?

Part B1 marksspecimenPolymers

Q.6

A polymer is formed between a dicarboxylic acid and a diamine. (a) What type of polymerization occurs? Explain. (b) Determine repeating-unit structure. (c) Identify functional grou…

Part C4 marksmodelPolymers

Q.6

A polymer is formed by the reaction between a dicarboxylic acid and a diamine. a) What type of polymerization occurs in this reaction? Explain. b) Determine the structure of the re…

Part C4 marksspecimenPolymers

2(iv)

Draw the structure showing how protein molecule is formed, clearly highlighting peptide linkages within the structure.

Part B2 marksmodelBiochemistry

2(iv)

Draw the structure showing how protein molecule is formed, clearly highlighting the peptide linkages within the structure.

Part B2 marksspecimenBiochemistry

2(x)

Vitamins are important for health. Summarize their sources and importance in health.

Part B1.5 marksmodelBiochemistry

2(x)

Vitamins are important for our health. Summarize their sources and importance in health.

Part B1.5 marksspecimenBiochemistry