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

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table]name of element | nucleon number | atomic number | number of...

2016 Summer

Theory

CH4 - STATES OF MATTER

D, E, F, and G are four consecutive elements in the fourth period of the Periodic Table. (The letters are not the actual symbols of the elements.)D is...

2016 Summer

Theory

CH10 - GROUP 2

The elements in Group 2, and their compounds, show many similarities and trends in their properties.(a) Magnesium, calcium, strontium and barium all r...

2016 Summer

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

This question is about molecules with molecular formula $C_4H_8$.(a) Give the structures of a pair of **positional** isomers with the formula $C_4H_8$...

2016 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the diagram to show the mechanism of reaction 1. Include all necessary charges, partial charges, lone pairs and curly arrows.H3C—C—Br...

2016 Summer

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table_1]name of element | nucleon number | atomic number | number ...

2016 Summer

Theory

CH5 - CHEMICAL ENERGETICS

The elements in Group 17, the halogens, and their compounds, show many similarities and trends in their properties. Some data are given for the elemen...

2016 Summer

Theory

CH6 - ELECTROCHEMISTRY

Acidified potassium dichromate(VI) can oxidise ethanedioic acid, $H_2C_2O_4$. The relevant half-equations are shown. $$Cr_2O_7^{2-} + 14H^+ + 6e^- \r...

2016 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

This question is about molecules with molecular formula $C_4H_8O_2$.(a) Give the structural formulae of the pair of extbf{chain} isomers with the for...

2016 Summer

Theory

CH17 - HYDROXY COMPOUNDS

A reaction sequence based on propan-1-ol is shown. (a) Reactions 1 and 2 can both be carried out using the same reagents. (i) Identify suitable rea...

2016 Summer