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

MCQ

CH8 - REACTION KINETICS

The diagram shows a Boltzmann distribution of molecular energies for a gaseous mixture. The distribution has a peak, labelled P on the diagram. What h...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

Which quantity gives the best indication of the relative strengths of the hydrogen bonds between the molecules in liquid hydrogen halides?

2015 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Use of the Data Booklet is relevant to this question.1.00 g of carbon is combusted in a limited supply of pure oxygen. 0.50 g of the carbon combusts t...

2015 Summer

MCQ

CH6 - ELECTROCHEMISTRY

In oxygen difluoride, $\text{OF}_2$, fluorine has an oxidation number of $-1$. $\text{OF}_2$ will react with sulfur dioxide according to the following...

2015 Summer

MCQ

CH4 - STATES OF MATTER

Use of the Data Booklet is relevant to this question.The gas laws can be summarised in the ideal gas equation below.$pV = nRT$0.96 g of oxygen gas is ...

2015 Summer

MCQ

CH7 - EQUILIBRIA

One mole of phosphorus(V) chloride, $\text{PCl}_5$, is heated to 600 K in a sealed flask of volume 1 dm$^3$. Equilibrium is established and measuremen...

2015 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The standard enthalpy changes of combustion of glucose and ethanol are given as −2820 and −1368 kJ molˉ¹ respectively.Glucose, C$_6$H$_{12}$O$_6...

2015 Summer

MCQ

CH7 - EQUILIBRIA

In which reaction is the underlined substance acting as a base? A. $\text{HNO}_3 + \underline{\text{H}_2\text{SO}_4} \rightarrow \text{H}_2\text{NO}_...

2015 Summer

MCQ

CH7 - EQUILIBRIA

One molecule of haemoglobin, Hb, can bind with four molecules of oxygen according to the following equation. $$\text{Hb(aq)} + 4\text{O}_2\text{(aq)}...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

The double bond between the two carbon atoms in an ethene molecule consists of one \( \sigma \) bond and one \( \pi \) bond.Which orbitals overlap to ...

2015 Summer