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 Boltzmann distribution for a gas at constant temperature is shown below. If the temperature of the gas is reduced by 10°C the graph changes shape...

2014 Summer

2

MCQ

CH2 - ATOMIC STRUCTURE

Which compound has the greatest total number of lone pairs of electrons in the valence shells of all of its atoms?

2014 Summer

2

MCQ

CH5 - CHEMICAL ENERGETICS

A reaction pathway diagram is shown. Which enthalpy change could the diagram not apply to?

2014 Summer

3

MCQ

CH2 - ATOMIC STRUCTURE

Use of the Data Booklet is relevant to this question.The most common ion-molecule reaction in gas clouds of the Universe is as shown.$$\text{H}_2(g) +...

2014 Summer

2

MCQ

CH6 - ELECTROCHEMISTRY

The electrolysis of brine using the diaphragm cell is an important industrial process. What happens at the anode?

2014 Summer

2

MCQ

CH5 - CHEMICAL ENERGETICS

Hydrazine, $\text{N}_2\text{H}_4$, is used as a rocket fuel because it reacts with oxygen as shown, producing 'environmentally friendly' gases.$\text{...

2014 Summer

2

MCQ

CH4 - STATES OF MATTER

A 10.0 cm^3 bubble of an ideal gas is formed on the sea bed where it is at a pressure of 2020 kPa. Just below the sea surface the pressure is 101 kPa ...

2014 Summer

2

MCQ

CH3 - CHEMICAL BONDING

Four substances have the physical properties shown in [Table_1].Which substance is an ionic solid?

2014 Summer

2

MCQ

CH5 - CHEMICAL ENERGETICS

The enthalpy change of formation of $\text{Mn(NO}_3)_2(\text{s})$ is $-696\text{ kJ mol}^{-1}$.The enthalpy change of formation of $\text{MnO}_2(\text...

2014 Summer

2

MCQ

CH3 - CHEMICAL BONDING

X is an element in Period 2. In which fluoride is the F−X−F angle the largest?

2014 Summer

2