MCQ

CH3 - CHEMICAL BONDING

The antidote molecule shown can help to prevent liver damage if someone takes too many paracetamol tablets. What is the order of decreasing size of th...

2009 Winter

MCQ

CH3 - CHEMICAL BONDING

Which molecule has the largest overall dipole?

2009 Winter

MCQ

CH3 - CHEMICAL BONDING

Which physical properties are due to hydrogen bonding between water molecules? 1. Water has a higher boiling point than H$_2$S. 2. Ice floats on wat...

2009 Winter

MCQ

CH3 - CHEMICAL BONDING

Which diagrams represent part of a giant molecular structure? 1. [Image with C] 2. [Image with C] 3. [Image with Na and Cl]

2010 Summer

Theory

CH3 - CHEMICAL BONDING

Elements and compounds which have small molecules usually exist as gases or liquids.(a) Chlorine, $Cl_{2}$, is a gas at room temperature whereas bromi...

2010 Summer

Theory

CH3 - CHEMICAL BONDING

Hydrazine, N$_2$H$_4$, can be used as a rocket fuel and is stored as a liquid. It reacts exothermically with oxygen to give only gaseous products. Th...

2010 Summer

Theory

CH3 - CHEMICAL BONDING

(a) Describe how the behaviour of the oxides of tin and lead in their +4 oxidation states differ on heating..............................................

2010 Summer

MCQ

CH3 - CHEMICAL BONDING

Organic nitrates in photochemical smog can cause breathing difficulties. The diagram shows an example of an organic nitrate molecule. What is the corr...

2010 Winter

MCQ

CH3 - CHEMICAL BONDING

Which types of intermolecular forces can exist between adjacent urea molecules?

2010 Winter

MCQ

CH3 - CHEMICAL BONDING

Organic nitrates in photochemical smog can cause breathing difficulties. The diagram shows an example of an organic nitrate molecule. What is the cor...

2010 Winter

MCQ

CH8 - REACTION KINETICS

The Boltzmann distribution for a gas at constant temperature is shown below. If the temperature of the gas is reduced by 10°C the graph changes shape...

2014 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Which compound has the greatest total number of lone pairs of electrons in the valence shells of all of its atoms?

2014 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

A reaction pathway diagram is shown. Which enthalpy change could the diagram not apply to?

2014 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Use of the Data Booklet is relevant to this question.The most common ion-molecule reaction in gas clouds of the Universe is as shown.$$\text{H}_2(g) +...

2014 Summer

MCQ

CH6 - ELECTROCHEMISTRY

The electrolysis of brine using the diaphragm cell is an important industrial process. What happens at the anode?

2014 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Hydrazine, $\text{N}_2\text{H}_4$, is used as a rocket fuel because it reacts with oxygen as shown, producing 'environmentally friendly' gases.$\text{...

2014 Summer

MCQ

CH4 - STATES OF MATTER

A 10.0 cm^3 bubble of an ideal gas is formed on the sea bed where it is at a pressure of 2020 kPa. Just below the sea surface the pressure is 101 kPa ...

2014 Summer

MCQ

CH3 - CHEMICAL BONDING

Four substances have the physical properties shown in [Table_1].Which substance is an ionic solid?

2014 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The enthalpy change of formation of $\text{Mn(NO}_3)_2(\text{s})$ is $-696\text{ kJ mol}^{-1}$.The enthalpy change of formation of $\text{MnO}_2(\text...

2014 Summer

MCQ

CH3 - CHEMICAL BONDING

X is an element in Period 2. In which fluoride is the F−X−F angle the largest?

2014 Summer