Theory

CH15 - HYDROCARBONS

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

CH15 - HYDROCARBONS

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

MCQ

CH15 - HYDROCARBONS

The presence of 11-cis retinal, $C_{20}H_{28}O$, in cells in the eye is important for vision.The structure of retinal includes an aldehyde group, a cy...

2009 Winter

MCQ

CH15 - HYDROCARBONS

What is the least number of carbon atoms in a non-cyclic alkane molecule that has a chiral centre?

2009 Winter

MCQ

CH15 - HYDROCARBONS

Bromine reacts with ethene to form 1,2-dibromoethane. What is the correct description of the organic intermediate in this reaction?

2009 Winter

MCQ

CH15 - HYDROCARBONS

Which equation represents a valid propagation step in the free radical reaction between ethane and chlorine?

2009 Winter

Theory

CH15 - HYDROCARBONS

(a) (i) Use the data to calculate $\Delta H^\circ_{\text{reaction}}$ for the formation of CH$_3$Cl. CH$_4$ + Cl$_2$ $\rightarrow$ CH$_3$Cl + HCl (...

2009 Winter

Theory

CH15 - HYDROCARBONS

(a) All the carbon atoms in benzene lie in the same plane. This means that they are coplanar, but this is not the case with cyclohexane.By rotating th...

2009 Winter

MCQ

CH15 - HYDROCARBONS

When gaseous chemicals are transported by road or by rail they are classified as follows.flammable        &nbs...

2010 Summer

MCQ

CH15 - HYDROCARBONS

When heated with chlorine, the hydrocarbon 2,2-dimethylbutane undergoes free radical substitution.In a propagation step the free radical $X^\cdot$ is ...

2010 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Copper and titanium are each used with aluminium to make alloys which are light, strong and resistant to corrosion. Aluminium, $Al$, is in the third p...

2009 Summer

Theory

CH10 - GROUP 2

Magnesium will react on heating with chlorine, or oxygen, or nitrogen to give the chloride, or oxide, or nitride respectively. Each of these compounds...

2009 Summer

Theory

CH15 - HYDROCARBONS

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

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the following reaction scheme which starts with ethanol.In each empty box, write the structural formula of the organic compound that woul...

2009 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) When F is formed in step I no other compound is produced. Suggest a structural formula for F, which contains one –OH group.(b) Compound G has tw...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Complete the electronic configuration of aluminium and of titanium, proton number 22.\[\begin{array}{|c|c|} \hline \text{Al} & 1s^2 \\ \hline \tex...

2009 Summer

Theory

CH10 - GROUP 2

(a) (i) Write an equation, with state symbols, for the second ionisation energy of calcium...............................................................

2009 Summer

Theory

CH15 - HYDROCARBONS

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

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the following reaction scheme which starts with propanone. In each empty box, write the structural formula of the organic compound that w...

2009 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

Ethanol, CH$_3$CHO, can be converted into compound U by the following sequence.(a) When T is formed in step I, no other compound is produced.Suggest a...

2009 Summer