Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Propanope, CH₃COCH₃, is an important organic reagent. Fig. 4.1 shows some reactions of propanone and its derivatives.[Image_1: Fig. 4.1 with react...

2024 Winter

4

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

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

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

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

2024 Summer

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

(a) (i) Write an equation for the formation of the electrophile for step 1. .............................................................................

2024 Spring

5

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

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

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Fig. 6.1 shows two reactions of ethanedioic acid, HOOC-COOH.(a) (i) Draw the organic product G in the box in Fig. 6.1. [1](ii) In Fig. 6.1, SOCl$_2$ i...

2024 Winter

3

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Four esters, A, B, C and D, with the molecular formula $C_6H_{12}O_2$ are shown in Fig. 7.1.(a) Give the systematic name of ester A......................

2024 Summer

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

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 of the...

2024 Winter

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

A reaction scheme is shown in Fig. 7.1.The reagents needed for reaction 2 and reaction 3 are stated.Reaction 5 takes place when $C_2H_5NH_2$ is mixed ...

2024 Winter

1

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Lactic acid, $\text{CH}_3\text{CH(OH)COOH}$, and pyruvic acid, $\text{CH}_3\text{COCOOH}$, both contain two functional groups. ![Image_1: Chemical str...

2023 Winter

3

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