Theory

Particle arrangement in solids, liquids, and gases

1. Some symbol equations and word equations, A to J, are shown:A. $\text{Fe}^{3+} + 3\text{OH}^– \rightarrow \text{Fe(OH)}_3$B. $\text{H}^+ + \text{...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

2. (a) The symbols of the elements in Period 2 of the Periodic Table are shown:Li Be B C N O F NeUse the symbols of the elements in Period 2 to answer...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

3. This question is about ionic and covalent compounds.(a) (i) Sodium reacts with oxygen to form the ionic compound sodium oxide. The electronic confi...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

4. Oxygen is produced by the decomposition of aqueous hydrogen peroxide. Manganese(IV) oxide, MnO2, is a catalyst for this reaction.(a) State the mean...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

5. This question is about electricity and chemical reactions.(a) The electrolysis of concentrated aqueous potassium bromide using graphite electrodes ...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

6. This question is about sulfur and compounds of sulfur. Sulfur is converted into sulfuric acid, H2SO4, by the Contact process. The process involves ...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

7. This question is about organic compounds.(a) Butane reacts with chlorine in a photochemical reaction.$\text{C}_4\text{H}_{10} + \text{Cl}_2 \righta...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

A list of oxides, A to H, is shown.A calcium oxideB aluminium oxideC silicon(IV) oxideD sulfur dioxideE carbon dioxideF iron(III) oxideG silver oxideH...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

Fluorine, chlorine and bromine are in Group VII of the Periodic Table.(a) State the name given to Group VII elements. [1](b) Explain why Group VII ele...

2023 Summer

Theory

Particle arrangement in solids, liquids, and gases

Over 200 million tonnes of sulfuric acid are manufactured every year.(a) State the name of the process used to manufacture sulfuric acid. [1](b) Part ...

2023 Summer

MCQ

Explain state changes using kinetic particle theory

Substance M is a solid at 30°C.The substance is heated to 80°C and its temperature measured as it cools down to room temperature.The cooling curve i...

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Which gas has the fastest rate of diffusion?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

There are two stable isotopes of bromine. The mass number of isotope 1 is 79. The mass number of isotope 2 is 81. Which statement is correct?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Which statement about ions and ionic bonds is correct?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Part of the Periodic Table is shown. Which type of chemical bonding is present in the oxide of F and in the oxide of G?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Elements X and Y react to form a compound.Element X loses two electrons and element Y gains one electron.What is the charge on the ions of elements X ...

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Which statement about graphite explains why it is used as an electrode?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Methane, CH_4, burns in air to form carbon dioxide and water. What is the balanced equation for this reaction?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

The equation for the thermal decomposition of sodium hydrogencarbonate is shown.$$2\text{NaHCO}_3 \rightarrow \text{Na}_2\text{CO}_3 + \text{H}_2\text...

2023 Spring

MCQ

Explain state changes using kinetic particle theory

An electrolysis experiment is done using carbon electrodes. Hydrogen and oxygen are formed at the electrodes. What is the electrolyte?

2023 Spring