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

CH3 - CHEMICAL BONDING

Which molecule contains six bonding electrons?

2017 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The mass spectrum of a sample of lithium shows that it contains two isotopes, $^6\text{Li}$ and $^7\text{Li}$.The isotopic abundances are shown in the...

2017 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A sports medal has a total surface area of 150 cm$^2$. It was evenly coated with silver by electrolysis. Its mass increased by 0.216 g.How many atoms ...

2017 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Which property of an atom does not affect its first ionisation energy?

2017 Summer

MCQ

CH3 - CHEMICAL BONDING

Which molecule has the largest overall dipole?

2017 Summer

MCQ

CH4 - STATES OF MATTER

The complete combustion of 2 moles of a straight chain alkane produces 400 dm^3 of carbon dioxide measured at 301 K and 1 \times 10^5 Pa. Carbon dioxi...

2017 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Which expression gives the standard enthalpy change of combustion of methane?

2017 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Solutions containing chlorate(I) ions are used as household bleaches and disinfectants. These solutions decompose on heating as shown. $$3ClO^- \righ...

2017 Summer

MCQ

CH6 - ELECTROCHEMISTRY

When $K_2MnO_4$ is dissolved in water, the following reaction occurs:$aMnO_4^{2-}(aq) + bH_2O(l) \rightarrow cMnO_4^{-}(aq) + dMnO_2(s) + eOH^{-}(aq)$...

2017 Summer

MCQ

CH7 - EQUILIBRIA

Methanol can be produced from hydrogen and carbon monoxide.$2H_2(g) + CO(g) \rightleftharpoons CH_3OH(g)$What is the expression for $K_p$ for this rea...

2017 Summer