Theory

CH8 - REACTION KINETICS

(a) The reaction between iodide ions and persulfate ions, $S_2O_8^{2-}$, is slow.$$2I^- + S_2O_8^{2-} \longrightarrow I_2 + 2SO_4^{2-} \quad 1$$The re...

2009 Summer

MCQ

CH8 - REACTION KINETICS

Four reactions of the type shown are studied at the same temperature.$X(g) + Y(g) \rightarrow Z(g)$Which is the correct reaction pathway diagram for t...

2009 Winter

Theory

CH8 - REACTION KINETICS

(a) Explain, using diagrams where appropriate, the types of interaction responsible for the primary, secondary and tertiary structure of a protein.pri...

2009 Winter

MCQ

CH8 - REACTION KINETICS

Na_2S_2O_3 reacts with dilute HCl to give a pale yellow precipitate. If 1 cm^3 of 0.1 mol dm^{-3} HCl is added to 10 cm^3 of 0.02 mol dm^{-3} Na_2S_2O...

2010 Summer

MCQ

CH8 - REACTION KINETICS

Na₂S₂O₃ reacts with dilute HCl to give a pale yellow precipitate. If 1 cm³ of 0.1 mol dm⁻³ HCl is added to 10 cm³ of 0.02 mol dm⁻³ Na₂...

2010 Summer

Theory

CH8 - REACTION KINETICS

The diagram below shows, for a given temperature T, a Boltzmann distribution of the kinetic energy of the molecules of a mixture of two gases that wil...

2010 Summer

Theory

CH8 - REACTION KINETICS

Phenacyl chloride has been used as a component of some tear gases. Its lachrymatory and irritant properties are due to it reacting with water inside b...

2010 Summer

Theory

CH8 - REACTION KINETICS

Phenacyl chloride has been used as a component of some tear gases. Its lachrymatory and irritant properties are due to it reacting with water inside b...

2010 Summer

MCQ

CH8 - REACTION KINETICS

The diagram represents the Boltzmann distribution of molecular energies at a given temperature. Which of the factors that affect the rate of a reactio...

2010 Winter

MCQ

CH8 - REACTION KINETICS

The diagram represents the Boltzmann distribution of molecular energies at a given temperature. Which of the factors that affect the rate of a reac...

2010 Winter

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

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

2018 Summer

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

MCQ

CH3 - CHEMICAL BONDING

Which solid contains more than one type of bonding?

2018 Summer

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