Theory

CH16 - HALOGEN DERIVATIVES

Chlorine is one of the elements in Group 17 of the Periodic Table.(a) (i) Describe the colours of the Group 17 elements, chlorine to iodine, at room t...

2024 Winter

3

Theory

CH16 - HALOGEN DERIVATIVES

(a) Complete Fig. 4.2 to show the mechanism for the formation of 1,2-dibromoethane in reaction 1.Include charges, dipoles, lone pairs of electrons and...

2024 Winter

2

Theory

CH16 - HALOGEN DERIVATIVES

(a) P, Q, R and S show stereoisomerism.Complete Table 4.1 by identifying with a tick (✓) the type of stereoisomerism that each molecule shows.The ty...

2024 Spring

5

Theory

CH16 - HALOGEN DERIVATIVES

Chlorine is one of the elements in Group 17 of the Periodic Table.(a) (i) Describe the colours of the Group 17 elements, chlorine to iodine, at room t...

2024 Winter

2

Theory

CH16 - HALOGEN DERIVATIVES

(a) Explain why trichloroethanoic acid, CCl$_3$COOH, is more acidic than ethanoic acid, CH$_3$COOH.......................................................

2024 Summer

2

Theory

CH16 - HALOGEN DERIVATIVES

Benzene reacts with chlorine gas to form chlorobenzene. This reaction can be described as the reaction between benzene molecules and $Cl^+$ ions. The ...

2024 Winter

2

Theory

CH16 - HALOGEN DERIVATIVES

(a) (i) State the reagent and conditions used to form E in reaction 1....................................................................................

2023 Spring

2

Theory

CH16 - HALOGEN DERIVATIVES

Fig. 3.1 describes a sequence of reactions that can be used to produce a food additive, compound Y, from $\text{CH}_3\text{CH}_2\text{Cl}$.(a) (i) Sta...

2023 Summer

3

Theory

CH16 - HALOGEN DERIVATIVES

(a) (i) Give the systematic name of D....................................................................................................................

2023 Winter

2

Theory

CH16 - HALOGEN DERIVATIVES

Compounds C and D are alkenes with the same molecular formula, $C_5H_{10}$. (a) (i) Give the systematic name of D. ..................................

2023 Winter

5

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