Theory

CH4 - STATES OF MATTER

(a) Table 3.1 shows some properties of two Group 14 elements, C and Sn, in their standard states. The table is incomplete.\begin{table} \centering \b...

2024 Winter

4

Theory

CH4 - STATES OF MATTER

(a) Table 3.1 shows some properties of two Group 14 elements, C and Sn, in their standard states. The table is incomplete.\begin{center} Table 3.1 \en...

2024 Winter

2

Theory

CH4 - STATES OF MATTER

NO and NO_2 react at 25 °C to give N_2O_3 as shown in the equation.NO(g) + NO_2(g) \rightleftharpoons N_2O_3(g) \hspace{5mm} \Delta H = -7.2 \, \text...

2023 Winter

3

Theory

CH4 - STATES OF MATTER

Potassium chlorate, $KClO_3$, is widely used as an oxidising agent and to make $O_2(g)$.(a) Define oxidising agent.......................................

2023 Winter

2

Theory

CH4 - STATES OF MATTER

The rate of chemical reactions is affected by changes in temperature and pressure.(a) (i) Draw a curve on the axes to show the Boltzmann distribution ...

2021 Spring

1

Theory

CH4 - STATES OF MATTER

Carbon monoxide gas, CO(g), and nitrogen gas, N_2(g), are both diatomic molecules.(a) The diagram shows the arrangement of outer electrons in a molecu...

2021 Summer

2

Theory

CH4 - STATES OF MATTER

Gallium is an element in Group 13.A sample of gallium is analysed using a mass spectrometer. The mass spectrum produced is shown.(a) Explain what is m...

2020 Summer

3

Theory

CH4 - STATES OF MATTER

(a) Write an equation to show the reaction occurring in stage 1..........................................................................................

2020 Summer

2

Theory

CH4 - STATES OF MATTER

(a) Explain what is meant by the term relative isotopic mass.............................................................................................

2020 Summer

2

Theory

CH4 - STATES OF MATTER

Calcium nitrate, Ca(NO3)2, reacts with ammonia, carbon dioxide and water to form a mixture of ammonium nitrate and calcium carbonate.Ca(NO3)2 + 2NH3 +...

2020 Summer

2

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

This question refers to isolated gaseous atoms.In which atom are all electrons paired?

2018 Summer

1

MCQ

CH3 - CHEMICAL BONDING

Which compound has a boiling point that is influenced by hydrogen bonding?

2018 Summer

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which fuel would produce the largest mass of CO$_2$ when 10 kg of the fuel undergo complete combustion?

2018 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The diagram shows the Boltzmann distribution of energies in a gas. The gas can take part in a reaction with an activation energy, $E_a$. The gas is ma...

2018 Summer

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which molecule has no overall dipole?

2018 Summer

1

MCQ

CH3 - CHEMICAL BONDING

Which solid contains more than one type of bonding?

2018 Summer

1

MCQ

CH5 - CHEMICAL ENERGETICS

Enthalpy changes of combustion can be used to determine enthalpy changes of formation. The following equation represents the enthalpy change of format...

2018 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Ethanedioate ions, $\text{C}_2\text{O}_4^{2-}$, react with a suitable reagent to form $\text{CO}_2$. A half-equation for this reaction is shown. $\te...

2018 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Oxidation numbers should be used to answer this question.A redox reaction takes place between hydroxylammonium ions, $[\text{NH}_3\text{OH}]^+$, and a...

2018 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Element X has a higher first ionisation energy than element Y.Two students state what they believe is one factor that helps to explain this.student 1 ...

2018 Summer

1