Theory

CH8 - REACTION KINETICS

(a) \( NH_3(g) \) reacts with \( HCl(g) \) to produce \( NH_4Cl(s) \), as shown.\[ NH_3(g) + HCl(g) \rightarrow NH_4Cl(s) \]Draw a diagram to show the...

2024 Summer

2

Theory

CH8 - REACTION KINETICS

(a) A and B react together to give product AB.A + B → ABWhen the concentrations of A and B are both 0.0100 mol dm−3, the rate of formation of AB i...

2024 Winter

3

Theory

CH8 - REACTION KINETICS

(a) The equation for reaction 1 is shown.reaction 1\qquad X \rightarrow 2YReaction 1 is first order with respect to the concentration of X. The half-l...

2024 Winter

2

Theory

CH8 - REACTION KINETICS

(a) In aqueous solution, persulfate ions, $S_2O_8^{2-}$, react with iodide ions, as shown in reaction 1.reaction 1 $S_2O_8^{2-} + 2I^- \rightarrow 2SO...

2024 Summer

2

Theory

CH8 - REACTION KINETICS

(a) In aqueous solution, persulfate ions, $\text{S}_{2}\text{O}_{8}^{2-}$, react with iodide ions, as shown in reaction 1.reaction 1 $\text{S}_{2}\tex...

2024 Summer

2

Theory

CH8 - REACTION KINETICS

(a) A and B react together to give product AB.A + B → ABWhen the concentrations of A and B are both 0.0100 mol dm⁻³, the rate of formation of AB ...

2024 Winter

3

Theory

CH8 - REACTION KINETICS

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

CH8 - REACTION KINETICS

Fluorine reacts with chlorine dioxide, $ClO_2$, as shown.$$F_2(g) + 2ClO_2(g) \rightarrow 2FClO_2(g)$$The rate of the reaction is first order with res...

2023 Winter

2

Theory

CH8 - REACTION KINETICS

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

CH8 - REACTION KINETICS

Hypophosphorous acid is an inorganic acid.The conjugate base of hypophosphorous acid is $\text{H}_2\text{PO}_2^-$.(a) Give the formula of hypophosphor...

2023 Spring

1

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