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

Solid X is heated for 600 seconds. The graph shows the heating curve that is obtained. What is the melting point of X?

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Which statements about diffusion are correct? 1. Aqueous ions cannot diffuse in water. 2. Diffusion is caused by the random movement of particles. 3....

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Which statement about an atom of fluorine, $^{19}_{9}\text{F}$, is correct?

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Two of the isotopes of calcium are represented as $^{40}_{20}\text{Ca}$ and $^{44}_{20}\text{Ca}$. Which statement explains why these isotopes of calc...

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Which statement describes a property of potassium iodide?

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Methanal, CH$_2$O, has a boiling point of $-19^{\circ}$C. At $-20^{\circ}$C, the liquid methanal is a non-conductor of electricity. In a sample of met...

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

The structures of diamond and graphite are shown. Which statement about diamond and graphite is correct?

2024 Spring

3

MCQ

Explain state changes using kinetic particle theory

Which row contains a description of metallic bonding and a property that is explained by reference to metallic bonding? [Table_1]

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

What is the relative molecular mass, $M_r$, of sulfur dioxide?

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Magnetite is an ore of iron which contains the ions $\text{Fe}^{2+}$, $\text{Fe}^{3+}$, and $\text{O}^{2-}$ only. What is the formula of magnetite?

2024 Spring

1