Theory

CH3 - CHEMICAL BONDING

(a) (i) Explain the lack of reactivity of nitrogen gas, $N_2(g)$.........................................................................................

2024 Summer

4

Theory

CH3 - CHEMICAL BONDING

Bismuth is an element in Group 15 of the Periodic Table.(a) Bismuth has metallic bonding.Draw a labelled diagram to show the metallic bonding in bismu...

2024 Spring

4

Theory

CH3 - CHEMICAL BONDING

Chlorine, $Cl_{2}$, reacts with many elements and compounds to form chlorides.Table 2.1 shows information about some chlorides of Period 3 elements.Ta...

2024 Spring

5

Theory

CH3 - CHEMICAL BONDING

(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

CH3 - CHEMICAL BONDING

Nitrogen, $N_2$, is generally an unreactive molecule but it does react under certain conditions. (a) Give two reasons to explain the lack of reactivi...

2024 Spring

4

Theory

CH3 - CHEMICAL BONDING

(a) Sulfur chloride, $\text{SCl}_2$, is a liquid at room temperature. When $\text{SCl}_2$ is added to water, misty fumes are seen and a solution is ma...

2024 Summer

4

Theory

CH3 - CHEMICAL BONDING

Hydrocarbon molecules contain covalent bonds.(a) Define covalent bond....................................................................................

2024 Summer

2

Theory

CH3 - CHEMICAL BONDING

Benzene reacts with chlorine gas to form chlorobenzene. This reaction can be described as the reaction between benzene molecules and $Cl^+$ ions. The ...

2024 Winter

2

Theory

CH3 - CHEMICAL BONDING

The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds.Use the information in Table 1.1 to answe...

2023 Spring

2

Theory

CH3 - CHEMICAL BONDING

The elements silicon, phosphorus and sulfur are in Period 3 of the Periodic Table.(a) (i) Describe the variation in atomic radius from silicon to sulf...

2023 Winter

3

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