Theory

CH22 - ANALYTICAL TECHNIQUES

Compound $W$ has molecular formula $C_4H_{10}O$. It contains only one functional group.(a) Table 5.1 shows the two peaks with the greatest $m/e$ value...

2024 Summer

2

Theory

CH22 - ANALYTICAL TECHNIQUES

(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

CH22 - ANALYTICAL TECHNIQUES

(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

CH22 - ANALYTICAL TECHNIQUES

(a) V shows stereoisomerism.(i) Explain what is meant by stereoisomerism.................................................................................

2024 Summer

2

Theory

CH22 - ANALYTICAL TECHNIQUES

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

CH22 - ANALYTICAL TECHNIQUES

Propanone, $\text{CH}_3\text{COCH}_3$, is an important organic reagent. Fig. 4.1 shows some reactions of propanone and its derivatives.(a) Reaction 1 ...

2024 Winter

3

Theory

CH22 - ANALYTICAL TECHNIQUES

Benzene, $C_6H_6$, reacts with chloroethane, $C_2H_5Cl$, in the presence of a suitable catalyst to form ethylbenzene, $C_6H_5C_2H_5$. In the presence ...

2024 Winter

2

Theory

CH22 - ANALYTICAL TECHNIQUES

Amino acids are molecules that contain —NH₂ and —COOH functional groups.Glycine, $H_2NCH_2COOH$, is the simplest stable amino acid.(a) The isoel...

2024 Spring

2

Theory

CH22 - ANALYTICAL TECHNIQUES

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

CH22 - ANALYTICAL TECHNIQUES

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

2024 Summer

2

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

This question refers to isolated gaseous atoms.In which atom are all electrons paired?

2018 Summer

1

MCQ

CH3 - CHEMICAL BONDING

Which compound has a boiling point that is influenced by hydrogen bonding?

2018 Summer

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which fuel would produce the largest mass of CO$_2$ when 10 kg of the fuel undergo complete combustion?

2018 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The diagram shows the Boltzmann distribution of energies in a gas. The gas can take part in a reaction with an activation energy, $E_a$. The gas is ma...

2018 Summer

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which molecule has no overall dipole?

2018 Summer

1

MCQ

CH3 - CHEMICAL BONDING

Which solid contains more than one type of bonding?

2018 Summer

1

MCQ

CH5 - CHEMICAL ENERGETICS

Enthalpy changes of combustion can be used to determine enthalpy changes of formation. The following equation represents the enthalpy change of format...

2018 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Ethanedioate ions, $\text{C}_2\text{O}_4^{2-}$, react with a suitable reagent to form $\text{CO}_2$. A half-equation for this reaction is shown. $\te...

2018 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Oxidation numbers should be used to answer this question.A redox reaction takes place between hydroxylammonium ions, $[\text{NH}_3\text{OH}]^+$, and a...

2018 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Element X has a higher first ionisation energy than element Y.Two students state what they believe is one factor that helps to explain this.student 1 ...

2018 Summer

1