Theory

CH23 - ORGANIC SYNTHESIS

Phenol and chlorobenzene are less reactive towards certain reagents than similar non-aromatic compounds. Thus hexan-1-ol can be converted into hexylam...

2009 Summer

Theory

CH23 - ORGANIC SYNTHESIS

This question is about the modern techniques of analysis which may be used to determine molecular structures.(a) In X-ray crystallography X-rays are d...

2009 Winter

Theory

CH23 - ORGANIC SYNTHESIS

Compounds J and K are isomers with the molecular formula $C_5H_{11}NO$, and they contain the same functional group.They may both be obtained from etha...

2009 Winter

Theory

CH23 - ORGANIC SYNTHESIS

(a) Some drugs have to be given by injection, rather than by mouth. Name a functional group in a drug molecule that might be broken down by the acid ...

2010 Summer

Theory

CH23 - ORGANIC SYNTHESIS

The following chart shows some reactions of ethylbenzene and compounds produced from it. (i) Draw the structure of compound X in the box provided in t...

2010 Winter

Theory

CH23 - ORGANIC SYNTHESIS

The following scheme outlines the production of some compounds from ethene.(a) (i) Suggest the reagent and conditions for reaction I.....................

2010 Winter

Theory

CH23 - ORGANIC SYNTHESIS

One of the greatest challenges facing scientists today is the development of effective drugs to treat different forms of cancer.(a) Drugs can be intro...

2010 Winter

Theory

CH23 - ORGANIC SYNTHESIS

(a) There are several ways of introducing chlorine atoms into organic molecules. State the reagents and conditions necessary to carry out the followin...

2011 Summer

Theory

CH23 - ORGANIC SYNTHESIS

(a) State the functional groups which the above four reagents test for.(i) $\text{Br}_2(\text{aq})$......................................................

2011 Winter

Theory

CH23 - ORGANIC SYNTHESIS

Compound C has the molecular formula $C_7H_{14}O$. Treating C with hot concentrated acidified $KMnO_4(aq)$ produces two compounds, D, $C_4H_8O$, and E...

2011 Winter

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table]name of element | nucleon number | atomic number | number of...

2016 Summer

Theory

CH4 - STATES OF MATTER

D, E, F, and G are four consecutive elements in the fourth period of the Periodic Table. (The letters are not the actual symbols of the elements.)D is...

2016 Summer

Theory

CH10 - GROUP 2

The elements in Group 2, and their compounds, show many similarities and trends in their properties.(a) Magnesium, calcium, strontium and barium all r...

2016 Summer

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

This question is about molecules with molecular formula $C_4H_8$.(a) Give the structures of a pair of **positional** isomers with the formula $C_4H_8$...

2016 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the diagram to show the mechanism of reaction 1. Include all necessary charges, partial charges, lone pairs and curly arrows.H3C—C—Br...

2016 Summer

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table_1]name of element | nucleon number | atomic number | number ...

2016 Summer

Theory

CH5 - CHEMICAL ENERGETICS

The elements in Group 17, the halogens, and their compounds, show many similarities and trends in their properties. Some data are given for the elemen...

2016 Summer

Theory

CH6 - ELECTROCHEMISTRY

Acidified potassium dichromate(VI) can oxidise ethanedioic acid, $H_2C_2O_4$. The relevant half-equations are shown. $$Cr_2O_7^{2-} + 14H^+ + 6e^- \r...

2016 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

This question is about molecules with molecular formula $C_4H_8O_2$.(a) Give the structural formulae of the pair of extbf{chain} isomers with the for...

2016 Summer

Theory

CH17 - HYDROXY COMPOUNDS

A reaction sequence based on propan-1-ol is shown. (a) Reactions 1 and 2 can both be carried out using the same reagents. (i) Identify suitable rea...

2016 Summer