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

CH4 - STATES OF MATTER

The temperature of a sample of an inert gas is increased.What effect does this have on the number of molecules with the most probable energy and on th...

2019 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A sample of element X is analysed using mass spectrometry. The mass spectrum obtained is shown.What is the relative atomic mass of this sample of elem...

2019 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A washing powder contains sodium hydrogencarbonate, NaHCO_3, as one of the ingredients.In a titration, a solution containing 1.00 g of this washing po...

2019 Summer

MCQ

CH2 - ATOMIC STRUCTURE

The outermost electron in an atom of neon occupies a particular orbital.Which row shows the relative energy and shape of this orbital?[Table_1: Energy...

2019 Summer

MCQ

CH3 - CHEMICAL BONDING

In which species is there a lone pair of electrons?

2019 Summer

MCQ

CH4 - STATES OF MATTER

When an evacuated tube of volume 400 cm$^3$ is filled with gas at 300 K and 101 kPa, the mass of the tube increases by 0.65 g.Assume the gas behaves a...

2019 Summer

MCQ

CH4 - STATES OF MATTER

Under which conditions will nitrogen behave most like an ideal gas?[Table with conditions]

2019 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Two reactions and their enthalpy changes are shown.2C(s) + 2H$_2$(g) \rightarrow C$_2$H$_4$(g) \hspace{1em} \Delta H^\circ = +52.2 \text{ kJ mol}^{-1}...

2019 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Ethandioic acid, HO$_2$CCO$_2$H, can be oxidised by KMnO$_4$ in dilute sulfuric acid. The products of this reaction are carbon dioxide, water, potassi...

2019 Summer

MCQ

CH7 - EQUILIBRIA

Hydrogen iodide gas decomposes reversibly producing iodine vapour and hydrogen.$$2HI(g) \rightleftharpoons I_2(g) + H_2(g) \quad \Delta H = +12 \text{...

2019 Summer