Theory

CH7 - EQUILIBRIA

Concern over the ever-increasing use of fossil fuels has led to many suggestions for alternative sources of energy. One of these, suggested by Profess...

2009 Summer

Theory

CH7 - EQUILIBRIA

Concern over the ever-increasing use of fossil fuels has led to many suggestions for alternative sources of energy. One of these, suggested by Profess...

2009 Summer

Theory

CH7 - EQUILIBRIA

(a) Explain what is meant by the Bronsted-Lowry theory of acids and bases................................................................................

2009 Summer

Theory

CH7 - EQUILIBRIA

A large number of organic compounds are soluble in both water and non-aqueous solvents such as hexane. If such a compound is shaken with a mixture of ...

2009 Summer

MCQ

CH7 - EQUILIBRIA

The equilibrium \[ \text{N}_2(g) + \text{O}_2(g) ightleftharpoons 2\text{NO}(g) \quad \Delta H = +180 \, \text{kJ mol}^{-1} \] contributes to a serie...

2009 Winter

MCQ

CH7 - EQUILIBRIA

PCl\textsubscript{5} dissociates as follows:\( \text{PCl}_5(g) \rightarrow \text{PCl}_3(g) + \text{Cl}_2(g) \)The extent of dissociation is 13\% at 16...

2009 Winter

MCQ

CH7 - EQUILIBRIA

Which equilibria, in which all species are gaseous, would have equilibrium constants, $K_p$, with no units? 1. sulfur dioxide and oxygen in equilibri...

2009 Winter

MCQ

CH7 - EQUILIBRIA

Why does a mixture of hydrogen gas and bromine gas react together faster at a temperature of 500K than it does at a temperature of 400K?1. A higher pr...

2009 Winter

Theory

CH7 - EQUILIBRIA

One major difference between the properties of compounds of the transition elements and those of other compounds is that the compounds of the transiti...

2009 Winter

Theory

CH7 - EQUILIBRIA

(a) Analysis of the bodies of birds of prey show that the pesticide residues accumulate in the fatty tissues of the birds. This is because of the high...

2009 Winter

MCQ

CH2 - ATOMIC STRUCTURE

What could be the proton number of an element that has three unpaired electrons in each of its atoms?

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Use of the Data Booklet is relevant to this question.The elements radon (Rn), francium (Fr) and radium (Ra) have consecutive proton numbers in the Per...

2010 Summer

MCQ

CH4 - STATES OF MATTER

Which gas closely approaches ideal behaviour at room temperature and pressure?

2010 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Some bond energy values are listed below. [Table_1: ] These bond energy values relate to the following four reactions. P Br_2 \rightarrow 2Br Q ...

2010 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Given the following enthalpy changes,$I_2(g) + 3Cl_2(g) \rightarrow 2ICl_3(s) \quad \Delta H^\circ = -214 \text{ kJ mol}^{-1}$$I_2(s) \rightarrow I_2(...

2010 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Ammonium nitrate, NH$_4$NO$_3$, can decompose explosively when heated. NH$_4$NO$_3$ $\rightarrow$ N$_2$O + 2H$_2$O What are the changes in the oxidati...

2010 Summer

MCQ

CH20 - NITROGEN COMPOUNDS

The Haber process for the manufacture of ammonia is represented by the following equation. \( \text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\tex...

2010 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, $X$, reacts with an excess of chlorine to form 5.287 g of a compou...

2010 Summer

MCQ

CH4 - STATES OF MATTER

Which mass of gas would occupy a volume of 3 dm$^3$ at 25°C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm$^3$ at 25°C and 1 atmosphere pre...

2010 Summer

MCQ

CH7 - EQUILIBRIA

The table gives the concentrations and pH values of the aqueous solutions of two compounds, X and Y. Either compound could be an acid or a base.[Table...

2010 Summer