Theory

Interpret heating and cooling curves

A list of chemical and physical processes, A to H, is shown. A combustion B diffusion C melting D neutralisation E photosynthesis F reversible r...

2024 Winter

2

Theory

Interpret heating and cooling curves

This question is about atomic structure and the Periodic Table. (a) Define the term nucleon number. [1] (b) State the connection between the number ...

2024 Winter

2

Theory

Interpret heating and cooling curves

Copper(II) sulfate has the formula CuSO4. Aqueous copper(II) sulfate is a blue solution. A sample of aqueous copper(II) sulfate is made by adding exce...

2024 Winter

2

Theory

Interpret heating and cooling curves

When magnesium nitrate is heated strongly, magnesium oxide is formed. (a) The equation for this reaction is shown. \(2\text{Mg} (\text{NO}_3)_2 → ...

2024 Winter

3

Theory

Interpret heating and cooling curves

Hydrogen is the first element of the Periodic Table. (a) Hydrogen is used in fuel cells to produce electricity in vehicles. (i) Name the substance w...

2024 Winter

1

Theory

Interpret heating and cooling curves

Natural polyamides are polymers made from amino acid monomers. (a) State the type of polymerisation reaction that occurs when natural polyamides form...

2024 Winter

2

Theory

Interpret heating and cooling curves

1. A list of substances is shown: bauxite, carbon dioxide, cryolite, ethane, ethanol, ethene, graphite, helium, hematite, hydrogen, silicon(IV) oxide,...

2024 Winter

2

Theory

Interpret heating and cooling curves

2. This question is about electrolysis. (a) State the meaning of the term electrolysis. [2] (b) Table 2.1 gives some information about the electroly...

2024 Winter

2

Theory

Interpret heating and cooling curves

3. This question is about compounds of tin. (a) Tin(IV) oxide has the formula $\text{SnO}_2$. The relative formula mass, $M_r$, of $\text{SnO}_2$ is ...

2024 Winter

1

Theory

Interpret heating and cooling curves

4. This question is about sulfuric acid, $\text{H}_2\text{SO}_4$. (a) Dilute sulfuric acid and aqueous sodium hydroxide can be used to prepare sodium...

2024 Winter

1

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

1

MCQ

Explain state changes using kinetic particle theory

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

2023 Spring

1

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

2

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

2

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

2