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

CH2 - ATOMIC STRUCTURE

Which species contains the same number of neutrons as $^{14}_{6}\text{C}$ and the same number of electrons as $^{23}_{11}\text{Na}^+$?

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

Which process has the largest enthalpy change per mole?

2024 Spring

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Which sodium compound contains 74.2% by mass of sodium?

2024 Spring

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

What is the maximum volume of sulfur dioxide gas measured at room conditions produced from burning 100\,\text{dm}^3 of diesel fuel containing 0.834\,\...

2024 Spring

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which row shows the correct number of covalent bonds in a molecule of methylpropene? [Table_1]

2024 Spring

MCQ

CH3 - CHEMICAL BONDING

Aluminium chloride exists as $\text{Al}_2\text{Cl}_6$ molecules at room temperature. When heated to a high temperature, $\text{AlCl}_3$ molecules are ...

2024 Spring

MCQ

CH4 - STATES OF MATTER

The table shows the physical properties of four substances. Which substance has a giant covalent structure?

2024 Spring

MCQ

CH4 - STATES OF MATTER

At room temperature and pressure, $\text{H}_2\text{O}$ is a liquid and $\text{H}_2\text{S}$ is a gas.What is the reason for this difference of state?

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

The enthalpy change for a reaction can be calculated from values of:• enthalpies of formation, $\Delta H^{\circ}_f$• enthalpies of combustio...

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

Which reaction has an enthalpy change equal to the standard enthalpy change of formation of propane?

2024 Spring