Theory

CH4 - STATES OF MATTER

(a) Table 3.1 shows some properties of two Group 14 elements, C and Sn, in their standard states. The table is incomplete.\begin{table} \centering \b...

2024 Winter

4

Theory

CH4 - STATES OF MATTER

(a) Table 3.1 shows some properties of two Group 14 elements, C and Sn, in their standard states. The table is incomplete.\begin{center} Table 3.1 \en...

2024 Winter

2

Theory

CH4 - STATES OF MATTER

NO and NO_2 react at 25 °C to give N_2O_3 as shown in the equation.NO(g) + NO_2(g) \rightleftharpoons N_2O_3(g) \hspace{5mm} \Delta H = -7.2 \, \text...

2023 Winter

3

Theory

CH4 - STATES OF MATTER

Potassium chlorate, $KClO_3$, is widely used as an oxidising agent and to make $O_2(g)$.(a) Define oxidising agent.......................................

2023 Winter

2

Theory

CH4 - STATES OF MATTER

The rate of chemical reactions is affected by changes in temperature and pressure.(a) (i) Draw a curve on the axes to show the Boltzmann distribution ...

2021 Spring

1

Theory

CH4 - STATES OF MATTER

Carbon monoxide gas, CO(g), and nitrogen gas, N_2(g), are both diatomic molecules.(a) The diagram shows the arrangement of outer electrons in a molecu...

2021 Summer

2

Theory

CH4 - STATES OF MATTER

Gallium is an element in Group 13.A sample of gallium is analysed using a mass spectrometer. The mass spectrum produced is shown.(a) Explain what is m...

2020 Summer

3

Theory

CH4 - STATES OF MATTER

(a) Write an equation to show the reaction occurring in stage 1..........................................................................................

2020 Summer

2

Theory

CH4 - STATES OF MATTER

(a) Explain what is meant by the term relative isotopic mass.............................................................................................

2020 Summer

2

Theory

CH4 - STATES OF MATTER

Calcium nitrate, Ca(NO3)2, reacts with ammonia, carbon dioxide and water to form a mixture of ammonium nitrate and calcium carbonate.Ca(NO3)2 + 2NH3 +...

2020 Summer

2

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table]name of element | nucleon number | atomic number | number of...

2016 Summer

1

Theory

CH4 - STATES OF MATTER

D, E, F, and G are four consecutive elements in the fourth period of the Periodic Table. (The letters are not the actual symbols of the elements.)D is...

2016 Summer

1

Theory

CH10 - GROUP 2

The elements in Group 2, and their compounds, show many similarities and trends in their properties.(a) Magnesium, calcium, strontium and barium all r...

2016 Summer

1

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

This question is about molecules with molecular formula $C_4H_8$.(a) Give the structures of a pair of **positional** isomers with the formula $C_4H_8$...

2016 Summer

1

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the diagram to show the mechanism of reaction 1. Include all necessary charges, partial charges, lone pairs and curly arrows.H3C—C—Br...

2016 Summer

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table_1]name of element | nucleon number | atomic number | number ...

2016 Summer

2

Theory

CH5 - CHEMICAL ENERGETICS

The elements in Group 17, the halogens, and their compounds, show many similarities and trends in their properties. Some data are given for the elemen...

2016 Summer

3

Theory

CH6 - ELECTROCHEMISTRY

Acidified potassium dichromate(VI) can oxidise ethanedioic acid, $H_2C_2O_4$. The relevant half-equations are shown. $$Cr_2O_7^{2-} + 14H^+ + 6e^- \r...

2016 Summer

2

Theory

CH22 - ANALYTICAL TECHNIQUES

This question is about molecules with molecular formula $C_4H_8O_2$.(a) Give the structural formulae of the pair of extbf{chain} isomers with the for...

2016 Summer

2

Theory

CH17 - HYDROXY COMPOUNDS

A reaction sequence based on propan-1-ol is shown. (a) Reactions 1 and 2 can both be carried out using the same reagents. (i) Identify suitable rea...

2016 Summer

2