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

CH10 - GROUP 2

Group 2 metals form alkaline solutions in water.(a) (i) Write the equation for the reaction of calcium oxide with water..................................

2020 Spring

Theory

CH11 - GROUP 17

(a) Describe the trend in the colour of the Group 17 elements down the group. ..........................................................................

2020 Spring

Theory

CH17 - HYDROXY COMPOUNDS

(a) A series of reactions starting from glycerol is shown. (i) Suggest the reagent(s) and conditions for reaction 1. ....................................

2020 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

Iron is a transition element in the fourth period. Iron forms compounds containing the ions $\text{Fe}^{2+}$ and $\text{Fe}^{3+}$.(a) (i) Define the t...

2020 Spring

Theory

CH10 - GROUP 2

(a) Group 2 metals form stable carbonates and sulfates.(i) State and explain the trend in the thermal stability of the Group 2 carbonates down the gro...

2020 Spring

Theory

CH6 - ELECTROCHEMISTRY

Gold is an unreactive metal that can only be oxidised under specific conditions.(a) The standard electrode potential, $E^{\circ}$, of $\text{Au}^{3+}(...

2020 Spring

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Compound F has been found in small quantities in some cereals and dried fruit.(a) (i) Give the name of the functional groups labelled A and B.A .........

2020 Spring

Theory

CH7 - EQUILIBRIA

Gallic acid, $C_7H_6O_5$, is a naturally occurring aromatic molecule. [Image_1: Structure of gallic acid] (a) Gallic acid contains the carboxylic ...

2020 Spring

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Valinol can be synthesised by the following reactions. Reaction 1 uses valine as the starting material. (a) (i) Write an equation for reaction 1, u...

2020 Spring

MCQ

CH7 - EQUILIBRIA

Ethene can be oxidised to form epoxyethane, $C_2H_4O$.$$C_2H_4(g) + \frac{1}{2}O_2(g) \rightleftharpoons C_2H_4O(g) \quad \Delta H^\circ = -107 \text{...

2020 Summer