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

MCQ

CH2 - ATOMIC STRUCTURE

Which species contains the same number of neutrons as $^{14}_{6}\text{C}$ and the same number of electrons as $^{23}_{11}\text{Na}^+$?

2024 Spring

5

MCQ

CH5 - CHEMICAL ENERGETICS

Which process has the largest enthalpy change per mole?

2024 Spring

4

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Which sodium compound contains 74.2% by mass of sodium?

2024 Spring

4

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

What is the maximum volume of sulfur dioxide gas measured at room conditions produced from burning 100\,\text{dm}^3 of diesel fuel containing 0.834\,\...

2024 Spring

1

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which row shows the correct number of covalent bonds in a molecule of methylpropene? [Table_1]

2024 Spring

3

MCQ

CH3 - CHEMICAL BONDING

Aluminium chloride exists as $\text{Al}_2\text{Cl}_6$ molecules at room temperature. When heated to a high temperature, $\text{AlCl}_3$ molecules are ...

2024 Spring

4

MCQ

CH4 - STATES OF MATTER

The table shows the physical properties of four substances. Which substance has a giant covalent structure?

2024 Spring

3

MCQ

CH4 - STATES OF MATTER

At room temperature and pressure, $\text{H}_2\text{O}$ is a liquid and $\text{H}_2\text{S}$ is a gas.What is the reason for this difference of state?

2024 Spring

1

MCQ

CH5 - CHEMICAL ENERGETICS

The enthalpy change for a reaction can be calculated from values of:• enthalpies of formation, $\Delta H^{\circ}_f$• enthalpies of combustio...

2024 Spring

1

MCQ

CH5 - CHEMICAL ENERGETICS

Which reaction has an enthalpy change equal to the standard enthalpy change of formation of propane?

2024 Spring

2