Theory

CH15 - HYDROCARBONS

Chlorine, $Cl_{2}$, reacts with many elements and compounds to form chlorides.Table 2.1 shows information about some chlorides of Period 3 elements.Ta...

2024 Spring

5

Theory

CH15 - HYDROCARBONS

CH_3(CH_2)_5CHBrCH_3 exists as a pair of stereoisomers.(a) Draw the three-dimensional structures of the two stereoisomers of CH_3(CH_2)_5CHBrCH_3. R c...

2024 Summer

2

Theory

CH15 - HYDROCARBONS

(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

CH15 - HYDROCARBONS

Hydrocarbon molecules contain covalent bonds.(a) Define covalent bond....................................................................................

2024 Summer

2

Theory

CH15 - HYDROCARBONS

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

CH15 - HYDROCARBONS

(a) Nitrosyl chloride, NOCl, can be formed by the reaction between nitrogen monoxide and chlorine, as shown.$2NO + Cl_{2} \rightarrow 2NOCl$The initia...

2024 Summer

2

Theory

CH15 - HYDROCARBONS

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

CH15 - HYDROCARBONS

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

CH15 - HYDROCARBONS

(a) (i) Define addition reaction.........................................................................................................................

2023 Spring

2

Theory

CH15 - HYDROCARBONS

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

2023 Winter

2

Theory

CH3 - CHEMICAL BONDING

The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds.Use the information in Table 1.1 to answe...

2023 Spring

2

Theory

CH10 - GROUP 2

The Group 2 elements Mg to Ba are all silvery-white reactive metals.(a) (i) Draw a labelled diagram to show the bonding and structure of the Group 2 m...

2023 Spring

2

Theory

CH15 - HYDROCARBONS

(a) (i) Define addition reaction.........................................................................................................................

2023 Spring

2

Theory

CH16 - HALOGEN DERIVATIVES

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

2023 Spring

2

Theory

CH2 - ATOMIC STRUCTURE

(a) The most common zinc mineral contains zinc(II) sulfide, ZnS.(i) Complete the electrons in boxes diagram in Fig. 1.1 to show the electronic configu...

2023 Spring

3

Theory

CH6 - ELECTROCHEMISTRY

Hypophosphorous acid is an inorganic acid.The conjugate base of hypophosphorous acid is $\text{H}_2\text{PO}_2^-$.(a) Give the formula of hypophosphor...

2023 Spring

1

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

Vanadium is a transition element in Period 4 of the Periodic Table.(a) Define transition element.........................................................

2023 Spring

2

Theory

CH20 - NITROGEN COMPOUNDS

Ethylamine and phenylamine are primary amines.Fig. 4.1These two compounds are synthesised by different methods.(a) Several methods can be used to form...

2023 Spring

3

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

(a) Tulobuterol contains a benzene ring in its structure.Describe and explain the shape of benzene.In your answer, include:• the bond angle between ...

2023 Spring

2

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) (i) Suggest a compound that could be used as the stationary phase in this experiment.................................................................

2023 Spring

1