Theory

CH17 - HYDROXY COMPOUNDS

(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

CH17 - HYDROXY COMPOUNDS

(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

CH17 - HYDROXY COMPOUNDS

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

CH17 - HYDROXY COMPOUNDS

(a) An aqueous solution of phenol, $C_6H_5OH$, is acidic at 298K.Explain why phenol is more acidic than water............................................

2024 Winter

2

Theory

CH17 - HYDROXY COMPOUNDS

(a) (i) State what is meant by partition coefficient, $K_{pc}$...........................................................................................

2024 Summer

3

Theory

CH17 - HYDROXY COMPOUNDS

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

2024 Summer

2

Theory

CH17 - HYDROXY COMPOUNDS

(a) Samples of phenol, $C_6H_5OH$, are reacted separately with sodium and with dilute nitric acid.[Image_1: phenol structure]Fig. 9.1(i) Write the equ...

2024 Summer

3

Theory

CH17 - HYDROXY COMPOUNDS

(a) (i) State what is meant by partition coefficient, $K_{pc}$...........................................................................................

2024 Summer

2

Theory

CH17 - HYDROXY COMPOUNDS

(a) Samples of phenol, $C_6H_5OH$, are reacted separately with sodium and with dilute nitric acid.[Image_1: Fig. 9.1 - Structure of phenol](i) Write t...

2024 Summer

2

Theory

CH17 - HYDROXY COMPOUNDS

(a) An aqueous solution of phenol, $C_6H_5OH$, is acidic at 298 K.Explain why phenol is more acidic than water...........................................

2024 Winter

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