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

Theory

CH3 - CHEMICAL BONDING

The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds.Use the information in Table 1.1 to answe...

2023 Spring

Theory

CH10 - GROUP 2

The Group 2 elements Mg to Ba are all silvery-white reactive metals.(a) (i) Draw a labelled diagram to show the bonding and structure of the Group 2 m...

2023 Spring

Theory

CH15 - HYDROCARBONS

(a) (i) Define addition reaction.........................................................................................................................

2023 Spring

Theory

CH16 - HALOGEN DERIVATIVES

(a) (i) State the reagent and conditions used to form E in reaction 1....................................................................................

2023 Spring

Theory

CH2 - ATOMIC STRUCTURE

(a) The most common zinc mineral contains zinc(II) sulfide, ZnS.(i) Complete the electrons in boxes diagram in Fig. 1.1 to show the electronic configu...

2023 Spring

Theory

CH6 - ELECTROCHEMISTRY

Hypophosphorous acid is an inorganic acid.The conjugate base of hypophosphorous acid is $\text{H}_2\text{PO}_2^-$.(a) Give the formula of hypophosphor...

2023 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

Vanadium is a transition element in Period 4 of the Periodic Table.(a) Define transition element.........................................................

2023 Spring

Theory

CH20 - NITROGEN COMPOUNDS

Ethylamine and phenylamine are primary amines.Fig. 4.1These two compounds are synthesised by different methods.(a) Several methods can be used to form...

2023 Spring

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

(a) Tulobuterol contains a benzene ring in its structure.Describe and explain the shape of benzene.In your answer, include:• the bond angle between ...

2023 Spring

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) (i) Suggest a compound that could be used as the stationary phase in this experiment.................................................................

2023 Spring