Theory

CH7 - EQUILIBRIA

(a) Complete Table 1.1 using relevant information from the Periodic Table.Table 1.1| | nucleon number | proton number | number of elec...

2024 Summer

2

Theory

CH7 - EQUILIBRIA

(a) Describe and explain the change, if any, to the percentage yield of NH$_3$(g) produced in B compared to A............................................

2024 Summer

4

Theory

CH7 - EQUILIBRIA

(a) Describe what is meant by dynamic equilibrium. .....................................................................................................

2024 Summer

2

Theory

CH7 - EQUILIBRIA

Nitrogen, $N_2$, is generally an unreactive molecule but it does react under certain conditions. (a) Give two reasons to explain the lack of reactivi...

2024 Spring

4

Theory

CH7 - EQUILIBRIA

(a) Define Le Chatelier’s principle....................................................................................................................

2024 Summer

2

Theory

CH7 - EQUILIBRIA

(a) Disodium phosphate, $(\text{Na}^+)_{2}(\text{HPO}_4^{2-})$, reacts with an acid to form monosodium phosphate, $\text{Na}^+(\text{H}_2\text{PO}_4^-...

2024 Winter

2

Theory

CH7 - EQUILIBRIA

(a) (i) Describe the trend in the solubility of the hydroxides of magnesium, calcium and strontium.Explain your answer...................................

2024 Summer

2

Theory

CH7 - EQUILIBRIA

(a) Equation 1 shows water acting as a Brønsted–Lowry acid. equation 1 \[ \text{H}_2\text{O} + \text{NO}_2^- \rightleftharpoons \text{HNO}_2 + \tex...

2024 Spring

2

Theory

CH7 - EQUILIBRIA

Iron is a transition metal in Group 8 of the Periodic Table.(a) (i) Explain why iron has variable oxidation states.......................................

2024 Spring

3

Theory

CH7 - EQUILIBRIA

(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

CH10 - GROUP 2

Group 2 metals form alkaline solutions in water.(a) (i) Write the equation for the reaction of calcium oxide with water..................................

2020 Spring

2

Theory

CH11 - GROUP 17

(a) Describe the trend in the colour of the Group 17 elements down the group. ..........................................................................

2020 Spring

1

Theory

CH17 - HYDROXY COMPOUNDS

(a) A series of reactions starting from glycerol is shown. (i) Suggest the reagent(s) and conditions for reaction 1. ....................................

2020 Spring

2

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

Iron is a transition element in the fourth period. Iron forms compounds containing the ions $\text{Fe}^{2+}$ and $\text{Fe}^{3+}$.(a) (i) Define the t...

2020 Spring

3

Theory

CH10 - GROUP 2

(a) Group 2 metals form stable carbonates and sulfates.(i) State and explain the trend in the thermal stability of the Group 2 carbonates down the gro...

2020 Spring

1

Theory

CH6 - ELECTROCHEMISTRY

Gold is an unreactive metal that can only be oxidised under specific conditions.(a) The standard electrode potential, $E^{\circ}$, of $\text{Au}^{3+}(...

2020 Spring

1

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Compound F has been found in small quantities in some cereals and dried fruit.(a) (i) Give the name of the functional groups labelled A and B.A .........

2020 Spring

2

Theory

CH7 - EQUILIBRIA

Gallic acid, $C_7H_6O_5$, is a naturally occurring aromatic molecule. [Image_1: Structure of gallic acid] (a) Gallic acid contains the carboxylic ...

2020 Spring

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Valinol can be synthesised by the following reactions. Reaction 1 uses valine as the starting material. (a) (i) Write an equation for reaction 1, u...

2020 Spring

2

MCQ

CH7 - EQUILIBRIA

Ethene can be oxidised to form epoxyethane, $C_2H_4O$.$$C_2H_4(g) + \frac{1}{2}O_2(g) \rightleftharpoons C_2H_4O(g) \quad \Delta H^\circ = -107 \text{...

2020 Summer

2