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

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Some intercontinental jet airliners use kerosene as fuel. The formula of kerosene may be taken as $C_{14}H_{30}$.(a) To which homologous series of com...

2011 Summer

Theory

CH15 - HYDROCARBONS

(a) (i) What is meant by the term `cracking` and why is it carried out?..................................................................................

2011 Summer

Theory

CH10 - GROUP 2

(a) State the formula of each of the calcium compounds U to Y.   U V W X Y (b) Compound Y may be converted into compound V. Out...

2011 Summer

Theory

CH18 - CARBONYL COMPOUNDS

Ketones are widely used as solvents and as intermediates in the chemical industry.Ketones contain the reactive keto group, $\text{C=O}$.(a) Propanone,...

2011 Summer

Theory

CH5 - CHEMICAL ENERGETICS

(a) When calcium carbide is reacted with water, ethyne and calcium hydroxide are formed. Construct a balanced equation for this reaction. (b) (i) Wh...

2011 Summer

Theory

CH7 - EQUILIBRIA

Ethanoic acid can be reacted with alcohols to form esters, an equilibrium mixture being formed.$$\text{CH}_3\text{CO}_2\text{H} + \text{ROH} \rightlef...

2011 Summer

Theory

CH16 - HALOGEN DERIVATIVES

(a) Use relevant bond energies from the Data Booklet, and the equation below to calculate a value for the bond energy of the C–F bond.CH$_2$ = CH$_2...

2011 Summer

Theory

CH10 - GROUP 2

(a) State the formula of each of the barium compounds R to W.R .................................... S ....................................T .............

2011 Summer

Theory

CH6 - ELECTROCHEMISTRY

(a) (i) Describe, with the aid of a fully labelled diagram, the industrial electrolysis of brine in a diaphragm cell. State what each electrode is mad...

2011 Summer

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Although there are many different types of food eaten around the world, animal fats and/or vegetable oils are commonly used in cooking.Animal fats and...

2011 Summer