Theory

CH23 - ORGANIC SYNTHESIS

(a) M reacts to form R by the addition of one reagent, as shown in Fig. 5.1.Identify the reagent and conditions for this reaction.(b) R is also made f...

2024 Summer

2

Theory

CH23 - ORGANIC SYNTHESIS

Potassium iodide, KI, is used as a reagent in both inorganic and organic chemistry.(a) KI forms an ionic lattice that is soluble in water.(i) Define e...

2024 Spring

4

Theory

CH23 - ORGANIC SYNTHESIS

(a) Identify compound U which contains only three elements............................................................ [1](b) Describe the reagents an...

2024 Winter

2

Theory

CH23 - ORGANIC SYNTHESIS

Four esters, A, B, C and D, with the molecular formula C$_6$H$_{12}$O$_2$, are shown in Fig. 7.1.(a) Give the systematic name of ester A.................

2024 Summer

2

Theory

CH23 - ORGANIC SYNTHESIS

(a) (i) State the variation in solubilities of group 2 hydroxides........................................................................................

2023 Winter

2

Theory

CH23 - ORGANIC SYNTHESIS

(a) (i) State the variation in solubilities of group 2 hydroxides. ......................................................................................

2023 Winter

2

Theory

CH23 - ORGANIC SYNTHESIS

(a) State the molecular formula of the Sunset Yellow anion. ............................................................................................

2023 Winter

2

Theory

CH23 - ORGANIC SYNTHESIS

(a) Benzoyl chloride, $C_6H_5COCl$, can be made from ethyl benzene in a two-step process. A reaction scheme is shown. (i) Draw the intermediate org...

2023 Winter

2

Theory

CH23 - ORGANIC SYNTHESIS

(a) State the molecular formula of the Sunset Yellow anion...............................................................................................

2023 Winter

3

Theory

CH23 - ORGANIC SYNTHESIS

(a) Benzoyl chloride, $C_6H_5COCl$, can be made from ethyl benzene in a two-step process.A reaction scheme is shown.(i) Draw the intermediate organic ...

2023 Winter

2

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

1

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

1

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

1